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Journal articles on the topic 'Vascular disturbances'

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Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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1

Kimura, Robert S. "Animal models of inner ear vascular disturbances." American Journal of Otolaryngology 7, no. 2 (March 1986): 130–39. http://dx.doi.org/10.1016/s0196-0709(86)80042-4.

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2

Takimoto, Isao, and Meiho Nakayama. "Vascular Disturbances in Patients with Equilibrium Disorders." Practica Oto-Rhino-Laryngologica 85, no. 9 (1992): 1357–64. http://dx.doi.org/10.5631/jibirin.85.1357.

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3

Widimsky Jr., J., B. Strauch, O. Petrák, J. Rosa, Z. Somloova, T. Zelinka, and R. Holaj. "Vascular Disturbances in Primary Aldosteronism: Clinical Evidence." Kidney and Blood Pressure Research 35, no. 6 (2012): 529–33. http://dx.doi.org/10.1159/000340031.

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4

Zhdankina, A. A., M. B. Plotnikov, V. I. Smoliyakova, I. S. Ivanov, N. G. Kolosova, A. Zh Fursova, A. V. Kuchin, I. P. Chukicheva, and S. V. Logvinov. "Morphological aspects used of semisynthetic antioxidant dibornol in treatment of rats OXYS with involutional central chorioretinal degeneration." Bulletin of Siberian Medicine 8, no. 3 (June 28, 2009): 27–31. http://dx.doi.org/10.20538/1682-0363-2009-3-27-31.

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Retina of rats OXYS 6 months of age by treatment of 4-methyl-2,6-diisobornylphenol (dibornol) was researched. Mainly, rats OXYS have of vascular disturbances such as reduction open functional vasculars of choroidea, destruction of retinal pigmental epithelium and retinal neurons. Dibornol was protected of retina increased area of open vascular and safety of retinal neurons. Besides dibornol was prevented thrombosis in retinal vasculars.
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5

Bogdanov, Е. I., and Е. G. Mendelevich. "Clinico-mr-tomographic characteristics of different kinds of chronic vascular multiple brain lesions." Neurology Bulletin XXVIII, no. 3-4 (December 15, 1996): 9–13. http://dx.doi.org/10.17816/nb79636.

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21 patient with different clinical patterns of non-insult course of developing vascular brain disturbance were included into investigation. Standard neurological examination was fol lowed by MR-tomography. Different degress of intellectualmnestic disorders and various locomotor disturbances correspond to the depicted in tomograms multiple brain lesions with cortical and subcortical foci. Comparison of clinical and MRT-data didnt reveal in full measure correlations between them.
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6

Hashimoto, Hiroshi, Masahiro Sugawara, Hiroshi Tsuda, and Shunichi Hirose. "Lipo PEG1 Therapy for Vascular Disturbances in SLE." Japanese Journal of Clinical Immunology 9, no. 3 (1986): 157–64. http://dx.doi.org/10.2177/jsci.9.157.

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7

Lindsell, Christopher J. "Test battery for assessing vascular disturbances of fingers." Environmental Health and Preventive Medicine 10, no. 6 (November 2005): 341–50. http://dx.doi.org/10.1007/bf02898195.

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8

LINDSELL, Christopher J. "Test Battery for Assessing Vascular Disturbances of Fingers." Environmental Health and Preventive Medicine 10, no. 6 (2005): 341–50. http://dx.doi.org/10.1265/ehpm.10.341.

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9

Black, R. A., and T. V. How. "Attenuation of Flow Disturbances in Tapered Arterial Grafts." Journal of Biomechanical Engineering 111, no. 4 (November 1, 1989): 303–10. http://dx.doi.org/10.1115/1.3168383.

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Flow disturbances in tapered arterial grafts of angles of taper between 0.5 and 1.0 deg were measured in vitro using a pulsed ultrasound Doppler velocimeter. The increase in transition Reynolds numbers with angle of taper and axial distance was determined for steady flow. The instantaneous centerline velocities were measured distal to a 50 percent area stenosis (as a model of a proximal anastomosis), in steady and pulsatile flow, from which the disturbance intensities were calculated. A significant reduction in post-stenotic disturbance intensity was recorded in the tapered grafts, relative to a conventional cylindrical graft. In pulsatile flow with a large backflow component, however, there was an increase in disturbance intensity due to diverging flow during flow reversal. This was observed only in the 1.0 deg tapered graft. These findings indicate that taper is an important consideration in the design of vascular prostheses.
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10

Спиридоненко, В. В. "Diagnosis of Vascular Disturbances of Erectile Function in Men." Health of Man, no. 2 (June 30, 2020): 6–9. http://dx.doi.org/10.30841/2307-5090.2.2020.212410.

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11

Shakhparonova, N. V., A. S. Kadykov, and A. A. Telenkov. "PREVENTION AND THERAPY OF COGNITIVE DISTURBANCES OF VASCULAR GENESIS." Medical Council, no. 11 (January 1, 2017): 198–201. http://dx.doi.org/10.21518/2079-701x-2017-11-198-201.

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12

Santa Cruz, Maria R., Priscilla C. Hidalgo, Meredith S. Lee, Cornelius W. Thomas, and Suzanne Holroyd. "Buspirone for the treatment of dementia with behavioral disturbance." International Psychogeriatrics 29, no. 5 (January 26, 2017): 859–62. http://dx.doi.org/10.1017/s1041610216002441.

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ABSTRACTBehavioral disturbances are common but serious symptoms in patients with dementia. Currently, there are no FDA approved drugs for this purpose. There have been case reports and small case series of the use of buspirone. In this retrospective study, we review 179 patients prescribed buspirone for treatment of behavioral disturbance in dementia to better characterize the efficacy and potential side effects. All patients prescribed buspirone for behavioral disturbance due to dementia from a geropsychiatric outreach program were reviewed. Data was collected and analyzed using SPSS. One hundred-seventy-nine patients met criteria for the study with a mean age of 83.8 + 7. Alzheimer's dementia was the most common dementia (n = 61; 34.1%) followed by mixed dementia (n = 50, 27.9%) then vascular type (n = 31; 17.3%). Behavioral disturbances were mainly verbal aggression (n = 125; 69.8%), and physical aggression (n = 116; 64.8%). Using the Clinical Global Impression scale, 68.6% of patients responded to buspirone, with 41.8% being moderately to markedly improved. The mean dose of buspirone was 25.7 mg ± 12.50. Buspirone appears to be effective in treating behavioral disturbances in dementia. Future prospective and double blinded studies are needed.
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13

Fraserab, I. "Endometrial vascular changes and bleeding disturbances with long-acting progestins." Steroids 65, no. 10-11 (November 2000): 665–70. http://dx.doi.org/10.1016/s0039-128x(00)00188-4.

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14

Hargrave, R. "Affective behavioural disturbances in Alzheimer's disease and ischaemic vascular disease." Journal of Neurology, Neurosurgery & Psychiatry 68, no. 1 (January 1, 2000): 41–46. http://dx.doi.org/10.1136/jnnp.68.1.41.

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15

Hickey, Martha, and Ian S. Fraser. "Clinical implications of disturbances of uterine vascular morphology and function." Best Practice & Research Clinical Obstetrics & Gynaecology 14, no. 6 (December 2000): 937–51. http://dx.doi.org/10.1053/beog.2000.0136.

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16

Wada, Yoshiro, Nobuya Fujita, Isao Koh, Takashi Ueda, and Takashi Matsunaga. "Effects of Drugs for Vascular Disturbances on Patients with Vertigo." Practica oto-rhino-laryngologica. Suppl. 1990, Supplement37 (1990): 78–83. http://dx.doi.org/10.5631/jibirinsuppl1986.1990.supplement37_78.

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17

Horsburgh, Karen J., Michell Reimer, Philip Holland, Gillian Scullion, James McCulloch, and Jill Fowler. "P1-173: The link between vascular disturbances and Alzheimer's disease." Alzheimer's & Dementia 6 (July 2010): S224. http://dx.doi.org/10.1016/j.jalz.2010.05.723.

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18

Kozhevnikova, L. M., and P. V. Avdonin. "Disturbances in hormonal regulation of vascular tone during traumatic shock." Bulletin of Experimental Biology and Medicine 141, no. 5 (May 2006): 574–77. http://dx.doi.org/10.1007/s10517-006-0224-y.

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19

Tolstov, S. N., V. B. Mychka, I. A. Salov, Yu V. Prokhorova, and V. A. Vyshivanyuk. "Cardiorenal disturbances in perimenopausal women." Cardiovascular Therapy and Prevention 11, no. 3 (June 20, 2012): 16–29. http://dx.doi.org/10.15829/1728-8800-2012-3-16-29.

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Aim. To identify early signs of renal dysfunction; to investigate the associations between renal function and vascular remodelling; to evaluate the role of metabolic and hydrodynamic disturbances in the development of cardiorenal syndrome among perimenopausal women; and to assess the potential of hormone replacement therapy (17β-estradiol 1 mg and drospirenone 2 mg) for the correction of the above-mentioned disturbances. Material and methods. In total, 69 perimenopausal women were divided into two groups. Group I included 69 premenopausal women, while Group II consisted of 43 women in early postmenopause. Mean age in Group I was 49,0 years (95% CI 48,0-51,0 years); in Group II, it was 54,0 (50,0-56,0) years (p<0,01). Age at menopause reached 50,3 (48,0-52,0) years, with median duration of menopause of 3,5 (2,0-5,0) years. All participants underwent biochemical blood tests (creatinine (Cr), uric acid (UA), lipid profile, and glucose tolerance test (GTT)). Large elastic artery remodelling was assessed by intima-media thickness (IMT) of common carotid artery (CCA). Non-invasive assessment of endothelial vasoregulatory function involved the measurement of brachial artery (BA) endothelium-dependent vasodilatation (EDVD) in the reactive hyperemia test (RHT). Renal function was assessed by glomerular filtration rate (GFR) and Cr clearance (CrC). Monoalbuminuria (MAU) was qualitatively assessed with a urine strip test. Postmenopausal women were additionally divided into two groups: 23 patients were administered HRT (17β-estradiol 1 mg and drospirenone 2 mg; Angelique medication), while 20 women not receiving HRT comprised a control group. At the end of the study, after 12 months, the assessment of metabolic status, body mass dynamics, endothelial vasoregulatory function, and CCA IMT was repeated. Results. In most postmenopausal women, lipid and carbohydrate metabolism disturbances were observed, which were typical for metabolic syndrome (MS). Lipid metabolism disturbances were observed as early as in premenopause, but reached their maximum during early postmenopause. Postmenopausal women, compared to their peers in premenopause, had significantly higher fasting and postprandial levels of blood glucose. Structural and functional changes in vascular wall were more severe in postmenopausal vs. premenopausal women (p<0,001). While blood flow velocity in the RHT was comparable in both groups, postmenopausal women did not demonstrate a comparable increase in BA EDVD, in contrast to premenopausal females. This could point to the decrease in BA sensitivity to endothelial shear stress among women in postmenopause. Reduced GFR was observed only in postmenopausal women. MAU was registered in premenopausal women with normal GFR, as well as in postmenopausal females. These data on independent role of MAU and reduced GFR suggest an increase in the proportion of women with subclinical renal injury, as a manifestation of target organ damage. Conclusion. The associations between vascular structure and function, renal function, and main MS components were demonstrated. HRT (17β-estradiol 1 mg and drospirenone 2 mg) had beneficial effects on BP dynamics, visceral obesity, metabolic status, and arterial structure and function.
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20

Ocić, G., E. Stefanova, J. Djordjević, D. Pavlović, G. Tomić, P. Smiljković, and S. Žugić. "3-12-27 Cognitive disturbances in Alzheimer's disease and vascular dementia." Journal of the Neurological Sciences 150 (September 1997): S158—S159. http://dx.doi.org/10.1016/s0022-510x(97)85625-0.

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21

Schneider, R., and H. Klesewetter. "The Significance of Microcirculatory Disturbances in the Pathogenesis of Vascular Dementia." Pharmacopsychiatry 21, S 1 (1988): 11–16. http://dx.doi.org/10.1055/s-2007-1017059.

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22

De Witte, Lieve, Raf Brouns, Dimokritos Kavadias, Sebastiaan Engelborghs, Peter P. De Deyn, and Peter Mariën. "Cognitive, affective and behavioural disturbances following vascular thalamic lesions: A review." Cortex 47, no. 3 (March 2011): 273–319. http://dx.doi.org/10.1016/j.cortex.2010.09.002.

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23

Boedtkjer, Ebbe, Vladimir V. Matchkov, Donna M. B. Boedtkjer, and Christian Aalkjaer. "Negative News: Cl− and HCO3− in the Vascular Wall." Physiology 31, no. 5 (September 2016): 370–83. http://dx.doi.org/10.1152/physiol.00001.2016.

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Cl− and HCO3− are the most prevalent membrane-permeable anions in the intra- and extracellular spaces of the vascular wall. Outwardly directed electrochemical gradients for Cl− and HCO3− permit anion channel opening to depolarize vascular smooth muscle and endothelial cells. Transporters and channels for Cl− and HCO3− also modify vascular contractility and structure independently of membrane potential. Transport of HCO3− regulates intracellular pH and thereby modifies the activity of enzymes, ion channels, and receptors. There is also evidence that Cl− and HCO3− transport proteins affect gene expression and protein trafficking. Considering the extensive implications of Cl− and HCO3− in the vascular wall, it is critical to understand how these ions are transported under physiological conditions and how disturbances in their transport can contribute to disease development. Recently, sensing mechanisms for Cl− and HCO3− have been identified in the vascular wall where they modify ion transport and vasomotor function, for instance, during metabolic disturbances. This review discusses current evidence that transport (e.g., via NKCC1, NBCn1, Ca2+-activated Cl− channels, volume-regulated anion channels, and CFTR) and sensing (e.g., via WNK and RPTPγ) of Cl− and HCO3− influence cardiovascular health and disease.
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24

Suroto, Nur Setiawan. "Spinal Dural Arteriovenous Fistula: Diagnosis and Treatment." Neurologico Spinale Medico Chirurgico 1, no. 2 (August 7, 2018): 26. http://dx.doi.org/10.15562/nsmc.v1i2.104.

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Spinal dural arteriovenous (AV) fistulas are the most commonly encountered vascular malformation of the spinal cord and a treatable cause for progressive paraplegia or tetraplegia. They most commonly affected are elderly men and are classically found in the thoracolumbar region.Symptoms gradually progress or decline in a stepwise manner and are commonly associated with pain and sphincter disturbances. Surgical or endovascular disconnection of the fistula has a high success rate with a low rate of morbidity. Motor symptoms are most likely to improve after treatment, followed by sensory disturbances, and lastly sphincter disturbances.
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25

Gerbali, O. Yu, I. A. Krivoruchko, and N. N. Goncharova. "Pathophysiological disturbances in complicated pancreatic pseudocysts." Kazan medical journal 96, no. 2 (April 15, 2015): 191–97. http://dx.doi.org/10.17750/kmj2015-191.

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Aim. To determine profibrogenic mediators, markers of endothelial dysfunction and hemostasis in patients with different types of complicated pancreatic pseudocysts.Methods. The study included 47 patients aged 43.58±7.38 years: 42 males and 5 females. The patients were allocated to three groups based on the classification of pancreatic pseudocysts by A. D’Egidio and М. Schein (1991). All patients underwent surgery. Serum levels of vascular endothelial growth factor, matrix metalloproteinase-9, matrix metalloproteinase-2 tissue inhibitor, the complex of metalloproteinase-9 and inhibitor, plasma levels of interleukin-6, -8, -18 and -10 were determined by ELISA method. Blood glutathione peroxidase activity and malondialdehyde serum level were determined by spectrophotometry.Results.Levels of Interleukin-6, -8 and -18 was higher in patients with type I of pseudocysts compared to control (pConclusion. Increased concentration of matrix metalloproteinase-2 tissue inhibitor and increased inhibition coefficient in patients with chronic pancreatitis may reflect favorable conditions for pancreatic remodeling and fibrosis.
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26

Su, Xiangping, Minhuang Wang, Zhiqun Huang, Songling Fu, and Han Y. H. Chen. "Forest Understorey Vegetation: Colonization and the Availability and Heterogeneity of Resources." Forests 10, no. 11 (October 24, 2019): 944. http://dx.doi.org/10.3390/f10110944.

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Understorey vegetation comprises a major portion of plant diversity and contributes greatly to nutrient cycling and energy flow. This review examines the mechanisms involved in the response of understorey vegetation to stand development and the overstorey canopy following disturbances. The overall abundance and diversity of the understorey is enhanced with the availability and heterogeneity of light, soil nutrients, soil moisture, and substrates. Vascular plants are positively impacted by the availability and heterogeneity of light and soil nutrients, whereas non-vascular vegetation is more strongly influenced by colonization time, soil moisture, and substrates, and is decreased with a higher proportion of broadleaf overstorey. The availability of resources is a prominent driver toward the abundance and diversity of understorey vegetation, from the stand initiation to stem exclusion stage under a single-species dominated overstorey. However, resource heterogeneity dominates at the later stages of succession under a mixed overstorey. Climate and site conditions modify resource availability and heterogeneity in the understorey layer, but the extent of their influences requires more investigation. Forest management practices (clearcutting and partial harvesting) tend to increase light availability and heterogeneity, which facilitates the abundance and diversity of understorey vascular plants; however, these factors reduce the occurrence of non-vascular plants. Nevertheless, in the landscape context, anthropogenic disturbances homogenize environmental conditions and reduce beta-diversity, as well, the long-term effects of anthropogenic disturbances on understorey vegetation remain unclear, particularly compared with those in primary forests.
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27

Dutschmann, M., H. Waki, T. Manzke, A. E. Simms, A. E. Pickering, D. W. Richter, and J. F. R. Paton. "The potency of different serotonergic agonists in counteracting opioid evoked cardiorespiratory disturbances." Philosophical Transactions of the Royal Society B: Biological Sciences 364, no. 1529 (September 12, 2009): 2611–23. http://dx.doi.org/10.1098/rstb.2009.0076.

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Serotonin receptor (5-HTR) agonists that target 5-HT 4(a) R and 5-HT 1A R can reverse μ-opioid receptor (μ-OR)-evoked respiratory depression. Here, we have tested whether such rescuing by serotonin agonists also applies to the cardiovascular system. In working heart–brainstem preparations in situ , we have recorded phrenic nerve activity, thoracic sympathetic chain activity (SCA), vascular resistance and heart rate (HR) and in conscious rats, diaphragmatic electromyogram, arterial blood pressure (BP) and HR via radio-telemetry. In addition, the distribution of 5-HT 4(a) R and 5-HT 1A R in ponto-medullary cardiorespiratory networks was identified using histochemistry. Systemic administration of the μ-OR agonist fentanyl in situ decreased HR, vascular resistance, SCA and phrenic nerve activity. Subsequent application of the 5-HT 1A R agonist 8-OH-DPAT further enhanced bradycardia, but partially compensated the decrease in vascular resistance, sympathetic activity and restored breathing. By contrast, the 5-HT 4(a) R agonist RS67333 further decreased vascular resistance, HR and sympathetic activity, but partially rescued breathing. In conscious rats, administration of remifentanyl caused severe respiratory depression, a decrease in mean BP accompanied by pronounced bradyarrhythmia. 8-OH-DPAT restored breathing and prevented the bradyarrhythmia; however, BP and HR remained below baseline. In contrast, RS67333 further suppressed cardiovascular functions in vivo and only partially recovered breathing in some cases. The better recovery of μ-OR cardiorespiratory disturbance by 5-HT 1A R than 5-HT 4(a) R is supported by the finding that 5-HT 1A R was more densely expressed in key brainstem nuclei for cardiorespiratory control compared with 5-HT 4(a) R. We conclude that during treatment of severe pain, 5-HT 1A R agonists may provide a useful tool to counteract opioid-mediated cardiorespiratory disturbances.
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28

Kay, Jonathan. "Vascular Occlusion and Cardiac Conduction Disturbances in a Patient Undergoing Peritoneal Dialysis." Seminars in Dialysis 6, no. 2 (October 1, 2007): 135–39. http://dx.doi.org/10.1111/j.1525-139x.1993.tb00276.x.

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29

Hennerici, Michael G., Manfred Oster, Simon Cohen, Andreas Schwartz, Lillian Motsch, and Michael Daffertshofer. "Are Gait Disturbances and White Matter Degeneration Early Indicators of Vascular Dementia?" Dementia and Geriatric Cognitive Disorders 5, no. 3-4 (1994): 197–202. http://dx.doi.org/10.1159/000106723.

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30

Marcoccia, Antonella, Peter F. Klein-Weigel, Michael E. Gschwandtner, Jean Claude Wautrecht, Jiri Matuska, Ulrich Rother, and Alfons J. H. M. Houben. "Microcirculatory assessment of vascular diseases." Vasa 49, no. 3 (April 1, 2020): 175–86. http://dx.doi.org/10.1024/0301-1526/a000851.

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Summary. The term “microcirculation” refers to the terminal vascular network of the body, which includes arterioles, capillaries, venules as well as initial lymphatic vessels. Additionally, it insinuates to their unique function in thermoregulation, fluid balance, maintenance of cellular exchange, and metabolism. Disturbances of microvascular function were identified to precede macrovascular involvement in the presence of cardiovascular risk factors and is the hallmark of terminal disease stages like critical limb or acral ischemia. Nevertheless, despite its obvious significance in vascular medicine assessment of microvascular function became increasingly neglected in the clinical institutions during the last decades and seems to play a subordinary role in medical education. We therefore provide an overview over relevant and clinically practicable methods to assess microcirculation in vascular medicine with critical estimations of their pros and cons and their perspectives in the future.
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31

Gonçalves, Leila J. B., Edgar E. Santo-Silva, Maria Fabíola Barros, Kátia F. Rito, Inara R. Leal, and Marcelo Tabarelli. "The palm Syagrus coronata proliferates and structures vascular epiphyte assemblages in a human-modified landscape of the Caatinga dry forest." Journal of Tropical Ecology 36, no. 3 (May 2020): 123–32. http://dx.doi.org/10.1017/s0266467420000073.

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AbstractThe proliferation of disturbance-adapted species in human-modified landscapes may change the structure of plant communities, but the response of biodiversity to human disturbances remains poorly understood. We examine the proliferation of the palm, Syagrus coronata, in disturbed forest stands and its impacts on the structure of vascular epiphyte assemblages in a human-modified landscape of Brazilian Caatinga dry forest. First, we compared S. coronata density between old-growth and regenerating forest stands. We then surveyed vascular epiphytes on 680 phorophytes (S. coronata and non-palm/control species) across five habitat types with different disturbance levels. There was an eight-fold increase in S. coronata density in regenerating areas compared with in old-growth forest. Syagrus coronota supported richer epiphyte assemblages at local (i.e. per palm) and landscape (i.e. pooling all palms) scale than control phorophytes, supporting more than 11 times the number of species of control phorophytes at both scales. Epiphyte assemblages were more abundant, species-rich and dominated by abiotically dispersed species in forest sites with intermediate disturbance levels (regenerating forest stands). More than simply operating as an exclusive phorophyte for more than 90% of the epiphyte species we recorded here, S. coronata favours epiphyte persistence and structures their assemblages across human-modified landscapes of the Caatinga forest.
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32

Rai, Himanshu, Roshni Khare, Rajan Kumar Gupta, and Dalip Kumar Upreti. "Terricolous lichens as indicator of anthropogenic disturbances in a high altitude grassland in Garhwal (Western Himalaya), India." Botanica Orientalis: Journal of Plant Science 8 (March 2, 2012): 16–23. http://dx.doi.org/10.3126/botor.v8i0.5554.

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Lichens are known to be more sensitive indicators of ecosystem functioning and disturbances than any other cryptogams and vascular plant communities. Himalayan habitats, despite their stressed climates, harbor some of the unique biodiversity of the region, vital for overall ecosystem functioning and stability. Lichens, due to their desiccation tolerance, are able to survive in high altitude habitats and evolved into diverse categories and functional groups. Present study examines the terricolous lichen community in Chopta-Tungnath temperate-alpine grassland of Garhwal Himalaya, in order to identify potential elements (species/growth form) as indicator of anthropogenic disturbances. Terricolous lichens were sampled from twelve sites distributed in three stratified macrohabitats, along increasing altitudinal gradient. A total of twenty soil lichen species belonging to ten genera, six families and four morphological groups (i.e. leprose, foliose, dimorphic and fruticose) were identified. Terricolous lichen diversity was negatively correlated (r = 0.70; p<0.05) with altitude. Among the four growth forms, fruticose growth form was indicator of grazing disturbance, distinguishing low grazed high altitude (3400-4001 m asl) areas with highly grazed low altitude (2700-3000 m asl) to mid altitude (3000-3400 m asl) areas. Terricolous lichen diversity in the study area was found constrained by vascular plants at lower altitudes, human-related impacts (tourism and livestock grazing induced trampling) at mid-altitudes and habitat characteristics (low soil cover) at higher altitudes.doi: http://dx.doi.org/10.3126/botor.v8i0.5554 Botanica Orientalis – Journal of Plant Science (2011) 8: 16-23
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33

Huo, Yajing, Xuqing Wu, Jing Ding, Yang Geng, Weiwei Qiao, Anyan Ge, Cen Guo, Jianing Lv, Haifeng Bao, and Wei Fan. "Vascular Remodeling, Oxidative Stress, and Disrupted PPARγExpression in Rats of Long-Term Hyperhomocysteinemia with Metabolic Disturbance." PPAR Research 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/6738703.

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Hyperhomocysteinemia, a risk factor for vascular disease, is associated with metabolic syndrome. Our study was aimed at exploring the effect of long-term hyperhomocysteinemia with metabolic disturbances on vascular remodeling. We also studied oxidative stress and expression of PPARγin the coronary arteriole as a possible mechanism underlying vascular remodeling. Rats were treated with standard rodent chow (Control) or diet enriched in methionine (Met) for 48 weeks. Plasma homocysteine, blood glucose, serum lipids, malondialdehyde (MDA), superoxide dismutase (SOD), and nitric oxide (NO) levels were measured. Coronary arteriolar and carotid arterial remodeling was assessed by histomorphometric techniques and the expression of PPARγin vessel wall was investigated. In Met group, an increase in the level of fasting blood glucose, serum triglyceride, total cholesterol, MDA, and NO, a decline in the serum SOD level, and increased collagen deposition in coronary and carotid arteries were found. Moreover, we detected decreased expression of PPARγin the coronary arterioles in Met group. In summary, our study revealed metabolic disturbances in this model of long-term hyperhomocysteinemia together with vascular remodeling and suggested that impaired oxidative stress, endothelium dysfunction, and decreased PPARγexpression in the vessel wall could be underlying mechanisms.
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34

Gillet, J. L., A. Donnet, M. Lausecker, J. M. Guedes, J. J. Guex, and P. Lehmann. "Pathophysiology of visual disturbances occurring after foam sclerotherapy." Phlebology: The Journal of Venous Disease 25, no. 5 (September 24, 2010): 261–66. http://dx.doi.org/10.1258/phleb.2009.009068.

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Background Visual disturbances (VDs) are reported with an average rate of 1.4% after foam sclerotherapy (FS). Some clinical clues indicate that they could correspond to migraine with aura (MA). Aims To validate the hypothesis that VDs occurring after FS correspond to MA and are not transient ischaemic cerebro-vascular events. Method A prospective multicentre study was carried out by the French Society of Phlebology in collaboration with the Neurology Department of the Marseille University Hospital (France). We included prospectively and consecutively all patients who experienced VDs after FS using air to make the foam. The patients were assessed (1) clinically with a specific form describing procedures of FS and recording neurological symptoms, later analysed by a neurologist specialized in migraine; and (2) by a brain diffusion-weighted magnetic resonance imaging (MRI) (T1, T2, T2*, diffusion) carried out within two weeks and analysed by a neuroradiologist. Results Twenty patients, 16 women and four men, were included in 11 phlebology clinics. All kinds of veins were treated. VDs occurred in average seven minutes after FS. Clinical assessment showed that VDs presented characteristics of MA in all patients, with headache in 10 and without in 10. Paresthesia was observed in five patients and dysphasic speech disturbance in one. Fifteen patients (75%) had a personal history of migraine. Fifteen MRIs were performed within two weeks (mean: 8 days) and three were late (26 days). All of them were normal. MRI was not performed in two patients. Conclusion These results show that VDs occurring after FS correspond to MA and are not transient ischaemic cerebro-vascular events. We suggest a pathophysiological hypothesis resting on the release of endothelin that would reach the cerebral cortex through a paten foramen ovale.
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Koryshkov, N. A., and O. V. Zaytsev. "OSOBENNOSTI LEChENIYa POVREZhDENIY TARANNOY KOSTI." N.N. Priorov Journal of Traumatology and Orthopedics 10, no. 1 (March 15, 2003): 46–50. http://dx.doi.org/10.17816/vto200310146-50.

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The experience in diagnosis and treatment of 52 talus injuries (50 patients) is presented. Inclusion of computer tomography into examination complex allowed to improve the diagnosis accuracy, especially in fractures of talus body and talus blocking in sagittal plane. Eight (16%) patients underwent conservative treatment and 42 (84%) were operated on. Surgical dissection of medial malleolus provides anatomic (preservation of artery deltoideus) and vast approach for the revision of fracture zone. Reposition performed at the early terms as well as stable fixation of talus fragments by sunken metal-devices are the means for the compensation of vascular disturbances (aseptic necrosis). In case of moderate pain syndrome, development of small aseptic necrosis zones and absence of talus prolapse active vascular therapy and delayed tactics are indicated. In marked pain syndrome, vascular disturbances, significant aseptic necrosis of talus with its prolapse the indications to the resection astragalectomy should be considered. Long term results were observed in 43 patients. Good results were achieved in 36 (83.7%) and satisfactory results - in 7 (16.3%) patients.
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Koetje, Jan H., Karsten D. Ottink, Iris Feenstra, and Wilbert M. Fritschy. "Negative Pressure Incision Management System in the Prevention of Groin Wound Infection in Vascular Surgery Patients." Surgery Research and Practice 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/303560.

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Objectives. Groin wounds following vascular surgery are highly susceptible to healing disturbances, with reported site infections reaching 30%. Negative pressure incision management systems (NPIMS) are believed to positively influence the prevention of surgical wound-healing disturbances (WHD) and surgical site infections (SSI). NPIMS placed directly after closure of the surgical wound is thought to result in fewer infections; we analysed its effect on postoperative wound infections in patients after vascular surgery via the groin.Methods. From May 2012 to March 2013 we included 90 surgical patients; 40 received a NPIMS. All patients with WHDs were labelled and subanalysed for surgical site infection in case of positive microbiological culture. These infections were graded according to Szilagyi. Number of WHDs and SSIs were compared across cohorts.Results. Patient and perioperative characteristics were equal, except for a significantly higher number of emergency procedures among non-NPIMS patients. We found no significant differences in number of WHDs, SSIs, or Szilagyi grades between the two cohorts.Conclusion. The equal number of SSIs across cohorts showed that NPIMS could not reduce the number of surgical site infections after vascular groin surgery.
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Richter, M. "To what extent do natural disturbances contribute to Andean plant diversity? A theoretical outline from the wettest and driest parts of the tropical Andes." Advances in Geosciences 22 (October 13, 2009): 95–105. http://dx.doi.org/10.5194/adgeo-22-95-2009.

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Abstract. This paper deals with natural disturbances and their impact on vascular plant enrichment at two climatically contrasting Andean ranges, i.e. the perhumid Cordillera Real in southern Ecuador and the arid Cordillera de Atacama in northern Chile. In the first case, main triggers for an additional input of pioneer species during succession stages initiated by perturbations are landslides, mudflows, and, to a lesser extent, cohort mortality, floods, and wildlife damages. Droughts and wind are stressors, which reduce plant growth but hardly plant diversity, in contrast to enhanced UV radiation with its mutagen effect. Though stress effects are similar in the Atacama, disturbance regimes differ considerably in this dry mountain environment. Here, most perturbations are of small dimension such as nitrogen inputs by feces of Lamoids and burrow activities of tuco-tuco mice, both of them fostering nitrophilous plant communities. Flooding, gelifluction, and other denudation processes such as sheet wash occur too, however, do not charge species enrichment in the dry Andes. Although the perhumid study site represents one of the world's plant diversity "hotspots" and, by contrast, the arid one a comparatively "coldspot", pioneer species during successive stages after natural disturbances contribute in a similar percentage to the total plant inventories (appr. 10% of the species numbers). Relatively seen, natural disturbances are most important for species enrichment in the Atacama (200–500 species per 10 000 km2), while most other ecological factors delimit plant survival. Instead, plant life at the Ecuadorian study area benefits from many climatic and edaphic site conditions, and consequently, disturbances are considered only one of many driving forces for its hotspot status (>5000 species per 10 000 km2).
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Schreiber, Stefanie, Celine Z. Bueche, Cornelia Garz, Siegfried Kropf, Frank Angenstein, Juergen Goldschmidt, Jens Neumann, et al. "The Pathologic Cascade of Cerebrovascular Lesions in SHRSP: Is Erythrocyte Accumulation an Early Phase?" Journal of Cerebral Blood Flow & Metabolism 32, no. 2 (August 31, 2011): 278–90. http://dx.doi.org/10.1038/jcbfm.2011.122.

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Cerebral small vessel disease (CSVD) is associated with vessel wall changes, microbleeds, blood—brain barrier (BBB) disturbances, and reduced cerebral blood flow (CBF). As spontaneously hypertensive stroke-prone rats (SHRSP) may be a valid model of some aspects of human CSVD, we aimed to identify whether those changes occur in definite temporal stages and whether there is an initial phenomenon beyond those common vascular alterations. Groups of 51 SHRSP were examined simultaneously by histologic (Hematoxylin—Eosin, IgG-Immunohistochemistry, vessel diameter measurement) and imaging methods (Magnetic Resonance Imaging, 201-Thallium-Diethyldithiocarbamate/99m-Technetium-HMPAO Single Photon Emission Computed Tomography conducted as pilot study) at different stages of age. Vascular pathology in SHRSP proceeds in definite stages, whereas an age-dependent accumulation of erythrocytes in capillaries and arterioles represents the homogeneous initial step of the disease. Erythrocyte accumulations are followed by BBB disturbances and microbleeds, both also increasing with age. Microthromboses, tissue infarctions with CBF reduction, and disturbed potassium uptake represent the final stage of vascular pathology in SHRSP. Erythrocyte accumulations—we parsimoniously interpreted as stases—without cerebral tissue damage represent the first step of vascular pathology in SHRSP. If that initial phenomenon could be identified in patients, these erythrocyte accumulations might be a promising target for implementing prophylactic and therapeutic strategies in human CSVD.
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Stoyanova, Ekatherina, Marie Trudel, Hady Felfly, Damien Garcia, and Guy Cloutier. "Characterization of circulatory disorders in β-thalassemic mice by noninvasive ultrasound biomicroscopy." Physiological Genomics 29, no. 1 (March 2007): 84–90. http://dx.doi.org/10.1152/physiolgenomics.00305.2005.

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β-Thalassemia is an inherited hematological disease caused by a decrease or absence of production of β-globin that requires chronic therapeutic interventions. This condition leads to important arterial and venous thromboembolic events, transitory ischemic attacks, and microcirculatory obstructions, indicative of circulatory disturbances. To investigate the presence of microcirculatory disorders without the confounding effect of treatments, we used β-thalassemic mice with typical clinical characteristics of human β-thalassemia major. One impediment to the understanding of microcirculatory physiology, in particular for β-thalassemic mice, has been the lack of an appropriate noninvasive imaging approach. We thus developed a novel noninvasive high-frequency ultrasound imaging method to evaluate murine vascular hemodynamic properties. In our β-thalassemic mice, total peripheral vascular resistance was significantly increased ( P < 0.01) compared with wildtype littermates, whereas mean blood pressure, heart rate, and cardiac output were similar ( P = nonsignificant). Importantly, the vascular hemodynamics in β-thalassemic mice were significantly affected according to the Pourcelot indexes measured in the common carotid artery and abdominal aorta ( P < 0.01 and P < 0.05, respectively). Hence, our β-thalassemia characterization of vascular hemodynamics by noninvasive ultrasonic approaches proves the existence and provides unique quantitative assessment of microcirculatory flow disturbances in those mice.
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Garbuzenko, Dmitry Victorovich, Nikolay Olegovich Arefyev, and Dmitry Vladimirovich Belov. "Restructuring of the vascular bed in response to hemodynamic disturbances in portal hypertension." World Journal of Hepatology 8, no. 36 (2016): 1602. http://dx.doi.org/10.4254/wjh.v8.i36.1602.

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Menon, Nishanth Venugopal, Chengxun Su, Kuin Tian Pang, Zhai Juan Phua, Hui Min Tay, Rinkoo Dalan, Xiaomeng Wang, King Ho Holden Li, and Han Wei Hou. "Recapitulating atherogenic flow disturbances and vascular inflammation in a perfusable 3D stenosis model." Biofabrication 12, no. 4 (August 10, 2020): 045009. http://dx.doi.org/10.1088/1758-5090/aba501.

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42

Oudkerk, Matthijs, Dirkjan Kuijpers, Sytse F. Oudkerk, and Edwin JR van Beek. "The vascular nature of COVID-19." British Journal of Radiology 93, no. 1113 (September 1, 2020): 20200718. http://dx.doi.org/10.1259/bjr.20200718.

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A potential link between mortality, D-dimer values and a prothrombotic syndrome has been reported in COVID-19 patients. The National Institute for Public Health of the Netherlands published a report for guidance on diagnosis, prevention and treatment of thromboembolic complications in COVID-19 with a new vascular disease concept. The analysis of all available current medical, laboratory and imaging data on COVID-19 confirms that symptoms and diagnostic tests can not be explained by impaired pulmonary ventilation. Further imaging and pathological investigations confirm that the COVID-19 syndrome is explained by perfusion disturbances first in the lung, but consecutively in all organs of the body. Damage of the microvasculature by SARS 1 and SARS 2 (COVID-19) viruses causes microthrombotic changes in the pulmonary capillaries and organs leading to macrothrombosis and emboli. Therefore anticoagulant profylaxis, close lab and CT imaging monitoring and early anticoagulant therapy are indicated.
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Comas, Ferran, and José María Moreno-Navarrete. "The Impact of H2S on Obesity-Associated Metabolic Disturbances." Antioxidants 10, no. 5 (April 21, 2021): 633. http://dx.doi.org/10.3390/antiox10050633.

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Over the last several decades, hydrogen sulfide (H2S) has gained attention as a new signaling molecule, with extensive physiological and pathophysiological roles in human disorders affecting vascular biology, immune functions, cellular survival, metabolism, longevity, development, and stress resistance. Apart from its known functions in oxidative stress and inflammation, new evidence has emerged revealing that H2S carries out physiological functions by targeting proteins, enzymes, and transcription factors through a post-translational modification known as persulfidation. This review article provides a critical overview of the current state of the literature addressing the role of H2S in obesity-associated metabolic disturbances, with particular emphasis on its mechanisms of action in obesity, diabetes, non-alcoholic fatty liver disease (NAFLD), and cardiovascular diseases.
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44

Khomeini, Khomeini, Dody E. Dody E, and Erkadius Erkadius. "Hubungan Penurunan Kadar Natrium Terhadap Gangguan Pola Tidur Pasca TURP (Transurethral Resection of The Prostate)." Jurnal Kesehatan Andalas 2, no. 1 (January 1, 2013): 09. http://dx.doi.org/10.25077/jka.v2i1.56.

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AbstrakLatar Belakang. TURP merupakan tindakan operasi endoskopi standar baku untuk penatalaksanaan BPH yang memerlukan tindakan bedah. Dalam pengamatan sehari hari pasien pasca TURP mengeluhkan gangguan pola tidur pasca tindakan. Belum dilaporkan angka kejadian gangguan pola tidur pasca TURP. Salah satu masalah yang mungkin sebab yaitu terjadinya penurunan kadar natrium akibat imbibisi air irigant ke intra vaskuler. Penurunan kadar natrium dapat menyebabkan gangguan neurologis yang mengganggu pola tidur. Penurunan natrium berlanjut dapat menjadi sindroma TURP. Metodologi. Penelitian ini penelitian cross sectional, semua pasien BPH dilakukan pemeriksaan natrium dan diberikan kuesioner gangggan pola tidur. Setelah TURP dilakukan pemeriksaan natrium pasca TURP dan kuesioner kembali. Jumlah distribusi gangguan pola tidur dan kadar natrium disajikan dalam bentuk tabel. Tiap variabel dilakukan analisa dan uji statistik dengan menggunakan T-test, chisquare dan Fisher. Hasil. Didapatkan pasien dengan gangguan pola tidur 41%.. Didapatkan perbedaan bermakna hubungan antara umur pasien dengan gangguan pola tidur pada tabel 3 ( chisquare 1.999027 ). Tidak didapatkan perbedaan bermakna hubungan antara pekerjaan pasien dengan gangguan pola tidur pada tabel 5 (Chi square: 1.242). Tidak didapatkan perbedaan bermakna hubungan antara pendidikan pasien dengan gangguan pola tidur pada tabel 6 (chisquare 1,242). Tidak didapatkan perbedaan bermakna hubungan antara lama operasi dengan gangguan pola tidur tabel 7 (chisquare 3,306). Didapatkan lama operasi <1jam terjadi penurunan kadar natrium 3,783 + 2,235mmol/L sedangkan operasi > 1 jam terjadi penurunan natrium 6,692 + 6,047dengan perbedaan bermakna secara statistic.( t=2,087 ; P 0,044). Tidak didapatkan perbedaan bermakna hubungan antara jumlah cairan irigasi dengan gangguan pola tidur pada tabel 8 ( chi square 2,520). Tidak didapatkan perbedaan bermakna antara jumlah cairan irigasi dengan penurunan natrium pada gambar 2 (F1,35 = 3,004). Didapatkan Mean natrium sebelum TURP 139,3 + 3,7 dan natrium sesudah TURP 134,Kata kunci: Gangguan pola tidur, Penurunan kadar natrium, TURPAbstractBackground. TURP is the gold standard endoscopic surgery for the treatment of benign enlargement of the prostate gland that requires surgery. In daily observations after TURP patients often complain of sleep patterns disturbances . Incidence has not been reported sleep pattern disturbance after TURP. One problem that may cause sodium levels are decreasing as a result of water imbibition irigant to intra vascular. Declining levels of sodium cause neurological disorders that can disrupt sleep patterns. The decline continues of Sodium level could be a TURP syndrome.Methodology. This study is a cross sectional study, all patients with diagnose Benign Prostate Hypertrophi should be check sodium level and get questionnaire sleep patterns disturbances. After TURP check sodium level and questionnaires again . The number of distribution of sleep pattern disturbances and the sodium content is presented in tabular form. Each variabel was analize and statistic test with T-test, Fischer and chisquare.Results. Obtained patients with sleep patterns dsiturbances 41% . Achieved significant differences between relationship age of the patient with sleep patterns disturbances in Table 3 (chisquare 1.999027). No significant differences in the relationship between the work of patients with sleep patterns disturbances in table 5 (Chi square: 1,242). No significant differences in the relationship between the education of patients with sleep patterns dsiturbances in table 6 (chisquare 1.242). No significant differences in the relationship between long operation with sleep pattern disturbance in table 7 (chisquare 3.306). In this research, the operating time <1 hr make a decrease sodium levels 3.783 + 2.235 mmol / L, while operating > 1 hour decrease sodium 6.692 + 6.047 mmol/L with a statistically significant difference. (T = 2.087, P 0.044). No significant differences in the relationship between irrigation fluid with sleep patterns indisturbances table 8 (chi square 2.520). No significant differences between the amount of irrigation fluid with decreased of sodium level in figure 2 (F1, 35 = 3.004). Obtained Mean of sodium before TURP 139.3 + 3.7 and sodium after TURP 134.4 + 5.3 mmol / L. No significant differences between the relationship of sodium before TURP in table 9 (chi square 1.286) and post-TURP with decreased of sodium levels in table 10 (chi square 1.286) with sleep patterns disturbances after TURP. In getting significant differences between sleep patterns disturbances with decreases sodium levels in table 11 (Fischer: 0.0000118)Conclusion. The incidence of sleep patterns disturbances after TURP 41%. Sleep patterns disturbancesb after TURP is associated with decreased levels of sodium and operating time. No significant difference was found between age, occupation, education, with sleep patterns disturbances after TURP.Keywords:sleep patterns disturbances , decrease sodium levels, TURP.
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Xie, Xiang, Ju Tan, Dangheng Wei, Daoxi Lei, Tieying Yin, Junli Huang, Xiaojuan Zhang, Juhui Qiu, Chaojun Tang, and Guixue Wang. "In vitro and in vivo investigations on the effects of low-density lipoprotein concentration polarization and haemodynamics on atherosclerotic localization in rabbit and zebrafish." Journal of The Royal Society Interface 10, no. 82 (May 6, 2013): 20121053. http://dx.doi.org/10.1098/rsif.2012.1053.

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Atherosclerosis (AS) commonly occurs in the regions of the arterial tree with haemodynamic peculiarities, including local flow field disturbances, and formation of swirling flow and vortices. The aim of our study was to confirm low-density lipoprotein (LDL) concentration polarization in the vascular system in vitro and in vivo , and investigate the effects of LDL concentration polarization and flow field alterations on atherosclerotic localization. Red fluorescent LDL was injected into optically transparent Flk1: GFP zebrafish embryos, and the LDL distribution in the vascular lumen was investigated in vivo using laser scanning confocal microscopy. LDL concentration at the vascular luminal surface was found to be higher than that in the bulk. The flow field conditions in blood vessel segments were simulated and measured, and obvious flow field disturbances were found in the regions of vascular geometry change. The LDL concentration at the luminal surface of bifurcation was significantly higher than that in the straight segment, possibly owing to the atherogenic effect of disturbed flow. Additionally, a stenosis model of rabbit carotid arteries was generated. Atherosclerotic plaques were found to have occurred in the stenosis group and were more severe in the stenosis group on a high-fat diet. Our findings provide the first ever definite proof that LDL concentration polarization occurs in the vascular system in vivo . Both lipoprotein concentration polarization and flow field changes are involved in the infiltration/accumulation of atherogenic lipids within the location of arterial luminal surface and promote the development of AS.
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Moshetova, L. К., S. А. Usharova, S. V. Simonova, and К. I. Turkina. "Epidemiology of retinal vein occlusions: state-of-the-art." Russian Journal of Clinical Ophthalmology 21, no. 2 (2021): 86–89. http://dx.doi.org/10.32364/2311-7729-2021-21-2-86-89.

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Impaired blood flow in various organs and tissues is a common cause of disabling disorders that even result in a lethal outcome. Despite an extremely rapid development of modern medicine, the rate of these disorders is still high thus emphasizing the importance of further detailed studies on this issue. In addition to systemic vascular diseases, local blood flow disturbances are also prevalent among population. These disturbances result from more significant blood flow disorders. Retinal vein occlusion is not an exclusion. Acute retinal vein occlusions account for more than half of ocular vascular diseases and may lead to extremely severe ophthalmic complications that result in poor vision, blindness, and reduced quality of life in both young and elderly patients. The diversity of clinical presentations, their severity, and clinical course make the diagnosis challenging thus altering the assessment of the prevalence of these diseases. Keywords: retinal vein occlusion, epidemiology, systemic vascular disorders, risk factors, retinal vessels. For citation: Moshetova L.К., Usharova S.А., Simonova S.V.,Turkina К.I. Epidemiology of retinal vein occlusions: state-of-the-art. Russian Journal of Clinical Ophthalmology. 2021;21(2):86–89. DOI: 10.32364/2311-7729-2021-21-2-86-89.
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Jiang, Yanli, Qiang Li, Mengxiao Jia, and Zhencheng Yan. "PPARδ: A Potential Therapeutic Target for the Treatment of Metabolic Hypertension." International Journal of Hypertension 2019 (April 3, 2019): 1–7. http://dx.doi.org/10.1155/2019/7809216.

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High blood pressure and its associated cardiovascular diseases have been major risks for public health. Multiple metabolic risk factors can cause the vascular dysfunction and vascular lesion, and the hypertension due to metabolic disturbances was defined as metabolic hypertension. The members of a subfamily of the nuclear receptors, peroxisome proliferator-activated receptors (PPARs), were found to be key regulators of metabolism and vascular function. We provide up-to-date knowledge on the role of subtype PPARδ in the regulation of metabolism and vascular function and the effect of its intervention on the metabolic hypertension management. We hope to give some insights into the development of more effective treatments of metabolic hypertension and its main complications.
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48

Faivre, Nicolas, Catherine Boudreault, Sébastien Renard, Nicole J. Fenton, Sylvie Gauthier, and Yves Bergeron. "Prescribed burning of harvested boreal black spruce forests in eastern Canada: effect on understory vegetation." Canadian Journal of Forest Research 46, no. 6 (June 2016): 876–84. http://dx.doi.org/10.1139/cjfr-2015-0439.

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Ecosystem-based management advocates that forestry disturbances should aim to emulate natural disturbances to mitigate the landscape-level impact of forest management. This study compares the impact of clear-cuts followed by a prescribed burn (CCPB) with clear-cuts alone (CC) and current careful logging practices (CLAAG: “careful logging around advanced growth”) on understory composition within black spruce (Picea mariana Miller (BSP)) paludified forest stands at the plot, site, and treatment levels using a functional-type approach. Vascular and nonvascular taxa showed significant differences in composition at the plot level among treatments. We found that pioneer taxa occurred mainly in CCPB sites, while late-successional taxa characterized CC sites. CLAAG sites had higher taxa richness than CCPB and CC sites, and we found that CCPB treatments were most likely to promote vascular taxa compositions that are more similar to those observed after natural disturbances. Additionally, the relative abundance of Sphagnum spp., responsible for paludification, was significantly reduced in sites treated by prescribed burning. This study therefore presents results suggesting that prescribed burning might represent a sustainable alternative to current harvesting techniques in the Clay Belt of eastern Canada that could help in preserving biodiversity (in terms of understory species assemblage) while maintaining or even enhancing forest productivity.
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Dai, Xiaohua, Chunfa Chen, Zhongyang Li, and Xuexiong Wang. "Taxonomic, Phylogenetic, and Functional Diversity of Ferns at Three Differently Disturbed Sites in Longnan County, China." Diversity 12, no. 4 (April 1, 2020): 135. http://dx.doi.org/10.3390/d12040135.

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Human disturbances are greatly threatening to the biodiversity of vascular plants. Compared to seed plants, the diversity patterns of ferns have been poorly studied along disturbance gradients, including aspects of their taxonomic, phylogenetic, and functional diversity. Longnan County, a biodiversity hotspot in the subtropical zone in South China, was selected to obtain a more thorough picture of the fern–disturbance relationship, in particular, the taxonomic, phylogenetic, and functional diversity of ferns at different levels of disturbance. In 90 sample plots of 5 × 5 m2 along roadsides at three sites, we recorded a total of 20 families, 50 genera, and 99 species of ferns, as well as 9759 individual ferns. The sample coverage curve indicated that the sampling effort was sufficient for biodiversity analysis. In general, the taxonomic, phylogenetic, and functional diversity measured by Hill numbers of order q = 0–3 indicated that the fern diversity in Longnan County was largely influenced by the level of human disturbance, which supports the ‘increasing disturbance hypothesis’. Many functional traits of ferns at the most disturbed site were adaptive to the disturbance. There were also some indicators of fern species responding to the different disturbance levels. Hence, ferns may be considered as a good indicator group for environmental stress.
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Makogon, S. I., and A. S. Makogon. "Some Aspects of Vascular Theory of Development and Progression of Primary Open-Angle Glaucoma (Literature Review). Part 1." Ophthalmology in Russia 16, no. 1 (March 30, 2019): 12–18. http://dx.doi.org/10.18008/1816-5095-2019-1-12-18.

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The article presents a review of studies on various aspects of vascular theory of primary open-angle glaucoma (POAG) development and progression. The data of foreign and domestic scientists on the influence of hemodynamic disturbances in the glaucoma pathogenesis, including various levels: Central, regional and microcirculatory. Violations of the universal mechanism of vascular tone regulation, namely endothelial dysfunction are described. Vascular endothelium is a barrier between vascular wall and blood plasma. When the endothelium is damaged, its antithrombotic properties are transformed into a powerful prothrombotic potential. This leads to an imbalance between vasoconstrictors (endothelin) and vasodilators (nitric oxide). In addition, the release of biologically active substances with local neurotoxic effects. The authors noted an increase in the concentration of endothelin-1, studied its interaction with nitrogen oxide and considered its role in the occurrence of ischemia and the impact on the death of retinal ganglion cells. Scientists have noticed an increase in the level of Willebrand factor and increased platelet aggregation in patients with progressive glaucoma. As a possible cause of hemodynamic disturbances and glaucoma progression, the authors consider changes in blood rheological properties. In addition, the state of the three closely interacting components: the wall of blood vessels (primarily endothelium and subendothelial structures); cellular elements of blood (primarily platelets) and plasma proteolytic systems ensure the normal functioning of the hemostatic system. Changes in of these components state may affect the hemostatic system. Therefore, further study of various directions of vascular theory will help in understanding the etiopathogenesis of glaucoma.
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