Bibliografías temáticas / Central aortic

Literatura académica sobre el tema "Central aortic"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 4 de febrero de 2022

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Artículos de revistas sobre el tema "Central aortic"

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O’Rourke, Michael F. "Central aortic pressure". Journal of Hypertension 33, n.º 1 (enero de 2015): 187–88. http://dx.doi.org/10.1097/hjh.0000000000000450.

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Narayan, Om, Anthony Dart, Ian T. Meredith y James D. Cameron. "Central aortic pressure". Journal of Hypertension 33, n.º 1 (enero de 2015): 188–89. http://dx.doi.org/10.1097/hjh.0000000000000451.

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Carlsen, Rasmus Kirkeskov, Simon Winther, Christian D. Peters, Esben Laugesen, Dinah S. Khatir, Hans E. Bøtker, Morten Bøttcher, Per Ivarsen, My Svensson y Niels Henrik Buus. "Aortic Calcification Affects Noninvasive Estimates of Central Blood Pressure in Patients with Severe Chronic Kidney Disease". Kidney and Blood Pressure Research 44, n.º 4 (2019): 704–14. http://dx.doi.org/10.1159/000501226.

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Background: Central blood pressure (BP) assessed noninvasively considerably underestimates true invasively measured aortic BP in chronic kidney disease (CKD) patients. The difference between the estimated and the true aortic BP increases with decreasing estimated glomerular filtration rates (eGFR). The present study investigated whether aortic calcification affects noninvasive estimates of central BP. Methods: Twenty-four patients with CKD stage 4–5 undergoing coronary angiography and an aortic computed tomography scan were included (63% males, age [mean ± SD ] 53 ± 11 years, and eGFR 9 ± 5 mL/min/1.73 m2). Invasive aortic BP was measured through the angiography catheter, while non-invasive central BP was obtained using radial artery tonometry with a SphygmoCor® device. The Agatston calcium score (CS) in the aorta was quantified on CT scans using the CS on CT scans. Results: The invasive aortic systolic BP (SBP) was 152 ± 23 mm Hg, while the estimated central SBP was 133 ± 20 mm Hg. Ten patients had a CS of 0 in the aorta, while 14 patients had a CS >0 in the aorta. The estimated central SBP was lower than the invasive aortic SBP in patients with aortic calcification compared to patients without (mean difference 8 mm Hg, 95% CI 0.3–16; p = 0.04). The brachial SBP was lower than the aortic SBP in patients with aortic calcification compared to patients without (mean difference 10 mm Hg, 95% CI 2–19; p = 0.02). Conclusion: In patients with advanced CKD the presence of aortic calcification is associated with a higher difference between invasively measured central aortic BP and non-invasive estimates of central BP as compared to patients without calcifications.
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Buchnieva, Olha Volodymyrivna. "PROTECTION OF CENTRAL AND PERIPHERAL ORGANS IN AORTIC SURGERY". International Medical Journal, n.º 3 (2020): 19–23. http://dx.doi.org/10.37436/2308-5274-2019-3-3.

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The introduction into clinical practice of hypothermic circulatory arrest, both in the non−perfusion version and with an artificial circulation, was the beginning of active use of systemic hypothermia as an effective element of cerebral and visceral protection during combined cardiac surgeries, including in aorta pathology. To evaluate ways of protecting visceral organs and spinal cord, namely the "no perfusion" technique with drainage of cerebrospinal fluid, lateral aortic compression, left−atrial−femoral bypass, deep hypothermia with cardiac arrest, i.e. hypothermic circulatory arest, bypass grafting, artificial blood circulation and moderate hypothermia in surgery for acute aortic syndrome the results of treatment of the patients with acute bundle aortic aortic abdominal localization were analyzed. There was characterized the proposed and implemented in practice original method of protection, consisting in an access to aorta, which is pressed above the aneurysm at the level of bifurcation, and selective perfusion into the mouth of vessels supplying the internal organs with a custodiol solution with a temperature of 3−4°. All the patients with combined occlusion−stenotic lesions of different arterial pools have aortic prostheses with the inclusion of visceral arteries into bloodstream in different variants. The tendency of the more favorable post−surgery period in the patients to whom the implemented methods of protection were applied. Key words: aortic aneurysm, surgical treatment, organ protection.
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Adji, Audrey y Michael F. O’Rourke. "Central aortic pressure calibration". Journal of Hypertension 35, n.º 4 (abril de 2017): 893–94. http://dx.doi.org/10.1097/hjh.0000000000001246.

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Middeke, Martin. "Zentraler aortaler Blutdruck: Bedeutender Parameter für Diagnostik und Therapie". DMW - Deutsche Medizinische Wochenschrift 142, n.º 19 (septiembre de 2017): 1430–36. http://dx.doi.org/10.1055/s-0043-113212.

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AbstractIn recent years great emphasis has been placed on the role of central aortic blood pressure as measured non invasively using pulse wave analysis in pathophysiology of cardiovascular diseases and clinical aspects of hypertension. The difference of blood pressure between the central aorta and the brachial artery (amplification) is not constant but varies according to physiological, pathological and pharmacological mechanisms. Central aortic blood pressure is more strongly related to cardiovascular organ damages than does brachial pressure. Several antihypertensive drugs have different effects on aortic blood pressure as compared with brachial pressure. Central aortic blood pressure emerges superior to brachial pressure as target blood pressure in antihypertensive treatment.
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O’Rourke, Michael F. y Kenji Takazawa. "Measurement of central aortic pressure". Journal of Hypertension 29, n.º 10 (octubre de 2011): 2038–39. http://dx.doi.org/10.1097/hjh.0b013e32834b17b4.

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Boutouyrie, Pierre. "Measurement of central aortic pressure". Journal of Hypertension 29, n.º 10 (octubre de 2011): 2040–41. http://dx.doi.org/10.1097/hjh.0b013e32834b17c7.

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Segers, Patrick, Jan G. Kips, Sebastian J. Vermeersch y Luc M. Van Bortel. "Measurement of central aortic pressure". Journal of Hypertension 29, n.º 10 (octubre de 2011): 2039–40. http://dx.doi.org/10.1097/hjh.0b013e32834b22ff.

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Bulpitt, Christopher J., C. Rajkumar y James D. Cameron. "Central aortic blood pressure measurements". Journal of Human Hypertension 14, n.º 8 (agosto de 2000): 531. http://dx.doi.org/10.1038/sj.jhh.1001066.

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Tesis sobre el tema "Central aortic"

1

Camacho, Fernando Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Statistical analysis of central aortic blood pressure parameters derived from the peripheral pulse". Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2006. http://handle.unsw.edu.au/1959.4/26215.

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With the rise in prevalence of cardiovascular (CV) disease, risk stratification is becoming increasingly important. Accurate characterization of the CV system is required, for which central aortic blood pressure (BP) parameters form an integral part. However, invasive measurement of central aortic BP parameters (aP) is difficult. Therefore, non-invasive methods to estimate aP from the radial pressure pulse (rPulse) have been proposed. To analyze accuracy of estimated aP (aPhat) and applicability in risk stratification and diagnosis, this study presents: (1) a novel representation of the rPulse with minimal loss of information, (2) a framework for strict definition and statistical analysis of aPhat, and (3) a dynamic analysis of effects of mean BP (MP) and heart rate (HR) in the rPulse shape. Methods: (1) 2671 rPulse s measured by applanation tonometry were represented using the first eight principal components (PC) scores after standard PC transformation. rPulse shapes were compared in three subpopulations. (2) The concept of "estimation option" (EO) for aP estimation was presented. A framework for strict definition of aPhat and the comparison of EOs was proposed, and 7 different EOs compared. (3) A sequence of rPulse s was analyzed during soft exhalation maneuver (SEM) %, a mild Valsalva type maneuver, in eight healthy subjects. Radial BP and respiration pressure were continuously measured. The effects of MP and HR in the rPulse parameters were analyzed by standard linear regression for each subject. Results: (1) PC representation of the rPulse improves accuracy of the estimation of aPhat compared with the simple use of rPulse parameters. Subpopulations have distinctive rPulse shapes. (2) No single EO was better for the estimation of all aPhat. Inclusion of MP improves estimation accuracy. Despite further improvement when rPulse is included, the general transfer function EO is a biased estimator. (3) The dynamic analysis of the rPulse provides information of the effects of MP and HR in the rPulse not available in static analysis. The effects were specific for each individual and different from the results obtained from a general population. Conclusions: For accurate CV risk stratification, future studies should include a dynamic measurement of calibrated radial pressure pulse during SEM maneuver. Risk analysis and diagnosis should be based on representations of the rPulse with minimum loss of information. aPhat should be used for better understanding of the underlying physiological principles.
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2

Herajärvi, J. (Johanna). "Remote ischemic preconditioning in aortic surgery:Experimental studies with a porcine model". Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526215877.

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Abstract During cardiac and aortic surgery, disturbance of the blood supply in the central nervous system occurs when the repair of aortic pathologies is performed or a bloodless operation field is needed in complex cardiac surgery. To enable the suitable operation environment, the technique named hypothermic circulatory arrest (HCA) has been utilized via heart-lung machine. In this method, the core temperature is lowered to the target temperature, after which blood circulation is halted for a certain period of time. A challenge is that the successful usage of HCA, however still involves the risks of postoperative neurological complications and mortality. In cardiac and aortic arch surgery, the brain is at the highest risk for deficits, whereas in the repair of thoracoabdominal aortic aneurysms (TAAAs), spinal cord injury remains the most severe adverse outcome. Adjunctive protective strategies are required to reduce ischemic injury in these settings. In this thesis, Studies I and II focused on the spinal cord and the Study III on the brain. The studies were performed using acute (II, III) or subacute (I) experimental porcine models, primarily aiming to assess the effectiveness of remote ischemic preconditioning (RIPC) in spinal cord protection along with the aim of studying the underlying mechanisms of RIPC in neuroprotection. Studies I and II demonstrated enhanced motor evoked potential (MEP) responses in both hind limbs, indicating spinal cord protection by RIPC. The faster recovery of brain damage marker S100B along with higher cardiac index and lower systemic lactate levels confirmed the cardio- and neuroprotective properties of RIPC in Study III. The protective mechanism of RIPC was associated with increased antioxidant response (II, III)
Tiivistelmä Sydän- ja aorttakirurgiassa, keskushermoston verenkiertoa joudutaan häiritsemään toteutettaessa aortan korjausleikkauksia tai vaikeissa sydänkirurgisissa toimenpiteissä verettömän leikkausalueen saavuttamiseksi. Sydän-keuhkokoneen avulla toteutettava täydellinen verenkierron pysäytys mahdollistaa vaaditut olosuhteet. Tässä menetelmässä ydinlämpötilaa lasketaan ja verenkierron pysäytys toteutaan tavoitellussa kohdelämpötilassa tietyssä aikaikkunassa. Kyseisen menetelmän onnistunut käyttö sisältää kuitenkin riskejä operaatioiden jälkeisiin neurologisiin komplikaatioihin ja kuolleisuuteen. Sydämen ja aortankaaren kirurgiassa aivot ovat suurimmassa vaarassa vaurioille. Rinta- ja vatsa-aortan aneurysmien eli pullistumien korjausleikkauksiin liittyvä selkäydinvaurio on puolestaan yksi vakavimmista ja vaikeimmista seurauksista. Lisäsuojausmenetelmiä tarvitaan vähentämään iskeemistä vauriota näissä asetelmissa. Väitöskirjan osatyöt I ja II keskittyivät selkäytimeen. Osatyö III käsitteli puolestaan aivojen suojausta. Osatyöt toteutettiin akuutteina (II, III) ja subakuutteina (I) kokeellisina porsasmalleina. Tutkimusten tavoitteina oli arvioida esialtistavan perifeerisen raajaiskemian vaikuttavuutta selkäytimen suojauksessa sekä tutkia raajaiskemian taustalla olevia mekanismeja hermokudoksen suojauksessa. Osatöissä I, II havaittiin motoristen herätepotentiaalien parantuneita vasteita molemmissa takajaloissa osoittaen esialtistavan raajaiskemian suojaavan selkäydintä simuloidussa rinta-aortan korjaustoimenpiteessä. Osatyö III keskittyi alhaisessa lämpötilassa toteutettavaan täydelliseen verenkierron pysäytykseen. Tässä tutkimuksessa todetut aivovauriomarkkeri S100B tason nopeampi lasku, korkeampi sydänindeksi ja alhaisemmat laktaattitasot varmistivat raajaiskemian sydän- ja hermokudossuojausvaikutusta. Esialtistavan perifeerisen raajaiskemian suojaava mekanismi voidaan liittää parantuneeseen solujen antioksidanttivasteeseen (II, III)
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Celestin, Carey Jr. "Computational Fluid Dynamics Applied to the Analysis of Blood Flow Through Central Aortic to Pulmonary Artery Shunts". ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1972.

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This research utilizes CFD to analyze blood flow through pathways representative of central shunts, commonly used as part of the Fontan procedure to treat cyanotic heart disease. In the first part of this research, a parametric study of steady, Newtonian blood flow through parabolic pathways was performed to demonstrate the effect that flow pathway curvature has on wall shear stress distribution and flow energy losses. In the second part, blood flow through two shunts obtained via biplane angiograms is simulated. Pressure boundary conditions were obtained via catheterization. Results showed that wall shear stresses were of sufficient magnitude to initiate platelet activation, a precursor for thrombus formation. Steady results utilizing time-averaged boundary conditions showed excellent agreement with the time-averaged results obtained from pulsatile simulations. For the points of interest in this research, namely wall shear stress distribution and flow energy loss, the Newtonian viscosity model was found to yield acceptable results.
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4

Haapanen, H. (Henri). "Preconditioning against ischemic injury of the central nervous system in aortic surgery:an experimental study in a porcine model with remote ischemic preconditioning and diazoxide". Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219479.

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Abstract The repair of thoracoabdominal aortic aneurysms carries a substantial risk of ischaemic perioperative spinal cord injury. Although several protective methods have been developed, the risk of paraplegia has not been eliminated. Moreover, aortic aneurysms, including arch aneurysms, are complex clinical challenges requiring cerebral protection with hypothermic circulatory arrest (HCA). Hypothermia lowers the rate of cerebral metabolism and allows a temporary halt of the systemic circulation. However, there is still a risk for cerebral damage and a need for additional neuroprotective methods. During the last 15 years, our research group has used a porcine model to investigate a variety of neuroprotective tools. In this thesis, an animal model was utilized to study the efficacy of remote ischaemic preconditioning (RIPC) to ameliorate ischaemic damage to the central nervous system, and to shed light on the potential mechanism. Moreover, diazoxide, the pharmacological mimetic of RIPC, was tested in the HCA animal model. In the first Study (I), RIPC showed beneficial effect on the spinal cord against ischaemic insult as recorded with motor-evoked potentials. Strikingly, the beneficial effect of RIPC was observed even before the ischaemia. In the second Study (II), some beneficial effect of RIPC was seen in the immunohistochemical analysis of the spinal cord ischemia but the result remains inconclusive. Similarly, the diazoxide-treated animals had better hemodynamic status postoperatively and mildy better antioxidant activity of the brain in the third Study (III). The fourth study (IV) was a review of the current knowledge of RIPC from the cardiovascular point of view. Our studies indicate that RIPC might be a potential adjunct for preventing neuronal ischaemic injury in the setting of thoracoabdominal aortic surgery. Our result indicates that further preclinical studies with diazoxide are required before studies can be conducted in humans
Tiivistelmä Torakoabdominaalisen aortan aneurysman kirurginen korjaaminen sisältää riskin iskeemiselle selkäytimen vauriolle. Vaikka useita suojaavia tekniikoita on kehitetty, paraplegian riskiä ei ole saatu poistettua kokonaan. Kirurgisen korjaamisen haasteellisuus moninkertaistuu, jos aneurysma on laajentunut myös aortan kaareen. Tällöin vaaditaan hypotermista verenkierron pysäytystä (HCA). Hypotermia alentaa aivojen metabolista aktiivisuutta merkittävästi ja siten verenkierron väliaikainen pysäytys on mahdollista. Tästä huolimatta hypotermiseen verenkierron pysäytykseen liittyy riski aivokudoksen vauriolle. Meidän tutkimusryhmämme on tutkinut useita keskushermostoa suojaavia tekniikoita ja lääkeaineita viimeisen 15 vuoden aikana. Käytämme sikaa koe-eläin mallina, jota on tämänkin väitöskirjan osajulkaisuissa käytetty. Tämän väitöskirjatyön tarkoituksena on ollut tutkia sekä esialtistavan raajaiskemian (RIPC) että farmakologisen mimeetin, diazoxiden, keskushermostoa suojaavia vaikutuksia sekä niiden mahdollista vaikutusmekanismia. Ensimmäisessä osajulkaisussa esialtistava raajaiskemia paransi selkäytimen iskemian sietokykyä, mikä näkyi alaraajojen motorisissa herätepotentiaaleissa. Merkittävintä tutkimuksessa oli, että esialtistavan raajaiskemian edulliset vaikutuksen selkäytimeen oli nähtävissä jo ennen iskemiaa. Toisessa osajulkaisussa esialtistava raajaiskemialla oli nähtävissä edullisia, mutta ei varauksettomia, vaikutuksia selkäytimen iskemian immunohistokemiallisessa analyysissä. Kolmannessa osatyössä diazoxidin vaikutukset iskemiaa vastaan nähtiin parempana hemodynaamisena tilana ja antioksidatiivisen aktiivisuuden lisääntymisenä aivoissa, mutta tulos on myös tulkinnanvarainen. Neljäs osajulkaisu kokosi tämän hetken tietämyksen esialtistavasta raajaiskemiasta. Tutkimuksissamme osoitimme, että esialtistava raajaiskemiassa on potentiaalia tulla yhdeksi välineeksi keskushermoston iskemiaa vastaan torakoabdominaalisen aortan kirurgiassa. Lisäksi diazoxidin mahdolliset neuroprotektiiviset vaikutukset vaativat lisää koe-eläintutkimuksia ennen ihmiskokeisiin siirtymistä
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Freercks, Robert Jeremy. "The impact of vascular calcification on ambulatory and central aortic blood pressure in a South African dwelling dialysis population : a clinical, radiological and pathophysiological study of vascular health in a young prevalent dialysis population in a developing country". Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11995.

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In Sub-Saharan Africa, the prevalence of vascular calcification (VC) in CKD-5D is unknown. We undertook to determine the effect of ethnicity on VC, the risk factors for VC, the utility of abdominal X-ray (AXR) in predicting coronary calcium score (CCS) and the effect of VC on central aortic systolic pressure (CASP) and left ventricular mass index (LVMI) in South African dialysis patients. ... Black race significantly protects from VC in South African CKD-5D patients and warrants further study. The AXR is a useful screening tool for CCS in our population. VC does not appear to influence CASP in our population.
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Leme, Gracieli Ana [UNESP]. "Insuficiência aórtica subcrônica e vias centrais relacionadas à regulação da ingestão de sódio". Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/87756.

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A insuficiência aórtica (IAo) é uma patologia que cursa com sobrecarga cardíaca de volume e consequente hipertrofia tipo excêntrica. As principais causas são febre reumática e forma degenerativa senil. O paciente com IAo se mantém assintomático por décadas e quando há falha nos mecanismos compensatórios, ocorre aparecimento de disfunção sistólica e sintomas. Vários fatores neurohumorais contribuem no desenvolvimento da IAo, entre eles o sistema renina-angiotensina IIaldosterona, o principal sistema envolvido no controle da ingestão de água e sódio. Contudo, o comportamento de ingestão de água e sódio, bem como as vias centrais relacionadas a este comportamento, ainda não foram explorados na IAo. Os objetivos da presente dissertação foram verificar em ratos submetidos a IAo subcrôncia (4 semanas; IAo4), e crônica (8 semanas; IAo8), a: a) ingestão de água e NaCl 0.3M diárias; b) ingestão de água e NaCl 0.3M após o tratamento combinando Furosemida (Furo, 10mg/kg pc) associado a baixa dose do inibidor da enzima conversora da angiotensina II, captopril (Cap, 5 mg/kg pc); e c) possível alteração da expressão para a proteína c-fos em estruturas prosencefálicas, pontinas e bulbares após o tratamento combinando Furo/Cap. Para tanto foram utilizados dois grupos de ratos Wistar (280 - 300g) submetidos à IAo ou controle. A cirurgia da indução de IAo foi realizada através da punção retrógrada dos folhetos valvares. Exames de ecocardiogramas (ECO) foram realizados 4 (IAo4) e 8 (IAo8) semanas após a cirurgia para IAo. Durante este período a ingestão de água e NaCl 0,3Mfoi acompanhada doravante. Dois dias após os ECOs os animais receberam o tratamento Furo/Cap para a quantificação do volume ingerido. Quatro dias após os animais foram novamente submetidos ao tratamento Furo/Cap para a coleta...
Aortic regurgitation (AR) is a condition that courses with volume overload and excentric hypertrophy. Main causes are rheumatic fever and degenerative vascular disease. Patients remain asymptomatic for decades and only when there is failure of compensatory mechanisms, systolic dysfunction and symptoms appear. Several neurohural factors contribute to the development of AR, among them the reninangiotensin- aldosterone system, the main system involved in the control of sodium and water intake. However, water and sodium intake, as well as the central pathways related to this behavior, were not yet explored in AR model. The aims of the present dissertation were to verify in rats following a sub chronic (4 weeks; AR4), and chronic (8 weeks; AR8): a) the daily water and 0.3M NaCl intake; b) the water and 0.3M NaCl intake after the combined treatment of Furosemide (Furo, 10mg/kg bw) associated to low dose of the inhibitor of the enzyme conversor of the angiotensin II, captopril (Cap, 5 mg/kg bw); and c) the possible alteration of c-fos protein expression in fore- and hindbrain structures by following Furo/Cap treatment. We used two groups of Wistar rats (280 - 300g) submitted to AR or sham. AR procedure was shaped by retrograde puncture of the aortic valve leaflets. Transthoracic echocardiograms (ECO) were performed in AR4 and AR8 weeks after surgery. During this period of time, daily water and 0.3M NaCl intake were measured. Two days after the ECO the animals received the combined treatment of Furo/Cap for the quantification of the volume intake. Four days later, the animals were again submitted to Furo/Cap treatment to collect the brains to imunohistochemical procedures. As results, either for AR4 and AR8, the ECO revealed decrease in fractioned shortened (AR4: 50.7 ± 2.8... (Complete abstract click electronic access below)
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Rojas, Salomón Soriano Ordinola. "Correção dos Aneurismas da Aorta Torácica e Toracoabdominal: Técnica de Canulação Central". Faculdade de Medicina de São José do Rio Preto, 2003. http://bdtd.famerp.br/handle/tede/226.

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Introduction: The surgical treatment of the aneurysm of descending thoracic and thoracoabdominal aorta are related with risk of spinal cord ischemic, as well as, coagulation and renal function disorders. Among the spinal cord protection methods, there are liquor drainage, temporary bypass, intercostal arteries implant, deep hypothermia, selective cooling of spinal cord and drugs. Objective: The goal of this paper is to show the viability of using extracorporeal circulation from left atrium to ascending aorta with deep hypotermia for surgical treatment of the thoracic and thoracoabdominal aneurysms. Material and Methods: From January 1994 to July 2001, thirty eight patients were operated, 26 male with mean age of 54.6±12.7. Twelve patients (31.6%) were submitted to correction of thoracoabdominal aneurysm and twenty six to correction of descending aorta aneurysm. The etiologies were: post-trauma in one patient, dilatation after correction of coarctation of the aorta in four patients, syphilitic aortite in two , atherosclerotic in ten patients and aortic dissection in twenty one patients. After extracorporeal circulation installed, the patients were cooled, the faryngeal temperature ranged from 15° and 25°C (20.6±3.2°C). The total circulatory arrest time from nine to thirty six minutes (21.3±6.7). The aortic diameter ranged from 4 to 10.5 cm (8.1±1.5 cm). Results: As neurological complications, paraplegia ocurred in two cases (5.3%) and in one of them there was stroke associated. One patient had paraparesis in inferior members and one, had seizure. The respiratory complications ocurred in twelve (31.6%) patients and tracheostomy was necessary in two cases por delayed ventilaroty support. Two patients from this group (16.7%) died. Two patients had transitory elevation of creatinine but dialysis was not necessary. Emergency operation was performed in two cases and both died. The overall mortality was seven patients (18.4%) and the causes were: bleeding in one patient, respiratory insufficiency in two patients, sudden death in two, heart failure in one and failure of weaning from extracorporeal circulation. Conclusion: Surgical correction of descending thoracic aorta and thoracoabdominal aneurysms during deep hypothermia using extracorporeal circulation with cannulation of left atrium and ascending aorta is a safe method, with low mortality. The complications such as neurologic, respiratory and renal were according to the literature.
O tratamento cirúrgico dos aneurismas da aorta torácica descendente e toracoabdominal estão associados com risco de isquemia medular, como também, a distúrbios de coagulação e alterações da função renal. Dentre os métodos de proteção medular estão, a drenagem do líquido cefalorraquidiano, o bypass temporário, o reimplante das artérias intercostais, a hipotermia profunda, o esfriamento seletivo da medula espinhal e o uso de agentes farmacológicos. Objetivo: O objetivo deste trabalho é demonstrar a viabilidade do uso da circulação extracorpórea (CEC) estabelecida entre o átrio esquerdo e aorta ascendente para indução da hipotermia profunda na correção dos aneurismas torácicos e/ou toracoabdominais. Casuística e Método: No período de janeiro de 1994 a julho de 2001, foram operados 38 pacientes, sendo 26 do sexo masculino, com média de idade 54,6±12,7 anos. Doze pacientes (31,6%) foram submetidos a correção de aneurisma toracoabdominal e 26, a aneurismas torácicos descendentes. O diagnóstico etiológico foi pós-trauma em um paciente; pós-coarctação da aorta (corrigida ou não) em quatro; aortite sifilítica em dois; aterosclerótico, dez pacientes e dissecção de aorta em 21 pacientes. Os pacientes foram induzidos a hipotermia profunda por meio de CEC, com temperatura faríngea variando entre 15 e 25°C (20,6±3,2°C). O tempo de parada circulatória variou de nove a trinta e seis minutos (21,3±6,1 minutos). O diâmetro da aorta dos pacientes variou de quatro a 10,5 cm (8,1±1,5 cm). Resultados: Dentre as complicações neurológicas, a paraplegia ocorreu em dois casos (5,3%), sendo que em um paciente houve quadro associado de acidente vascular cerebral. Um paciente evoluiu com paraparesia de membros inferiores e um, com quadro de convulsão. As complicações respiratórias estiveram presentes em 12 pacientes (31,6%), sendo que dois (5,3%) necessitaram de traqueostomia por necessidade de ventilação mecânica por tempo prolongado, com mortalidade de 16,7% (dois pacientes). Dois pacientes apresentaram elevação transitória nos níveis de creatinina, sem indicação de diálise. Dois pacientes foram operados em caráter de urgência, evoluindo para óbito. A mortalidade total da casuística foi de sete pacientes (18,4%), sendo um por sangramento, dois por complicações respiratórias, dois por morte súbita, um por insuficiência cardíaca e um por dificuldade de saída de CEC. Conclusão: A correção dos aneurismas da aorta torácica descendente e toracoabdominal com o emprego da hipotermia profunda de indução interna pela circulação extracorpórea estabelecida entre o átrio esquerdo e a aorta ascendente, demonstrou ser um método viável para o tratamento cirúrgico dos aneurismas torácicos e toracoabdominais apresentando: mortalidade, complicações neurológicas, renais e respiratórias compatíveis com os achados da literatura da época.
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Almonacid, Jorge Bruno y Irma Jaquelina Rodríguez. "Educación a pacientes con aneurisma y disección de aorta". Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería, 2004. http://bdigital.uncu.edu.ar/7882.

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En este trabajo de investigación se intenta saber el grado de interés y preocupación de los pacientes diagnosticados con aneurisma y disección aórtica en cuanto a su patología y su tratamiento. Es por ello que tiene como objetivo general determinar el tipo de educación y cuáles fueron las fuentes de información que recibieron dichos pacientes durante su fase de internación en el servicio de unidad coronaria del Hospital Central durante el año 2003, sobre cuidados y cambios de hábitos para evitar complicaciones y secuelas. Es un estudio cuantitativo y descriptivo, de corte transversal. Se trabajó con una muestra de 18 pacientes internados a los cuales se les realizó una encuesta estructurada con preguntas cerradas.
Fil: Almonacid, Jorge Bruno. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería..
Fil: Rodríguez, Irma Jaquelina. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Escuela de Enfermería..
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Miguet, Daniel. "Etude randomisée de la surveillance hémodynamique par Swan Ganz versus PVC au cours de la chirurgie de l'aorte abdominale". Saint-Etienne, 1989. http://www.theses.fr/1989STET6019.

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Handberg, Amanda y Hanna Enehov. "Patienters upplevelser relaterat till abdominalt aortaaneurysm och hur det påverkar det dagliga livet : En systematisk litteraturöversikt". Thesis, Malmö universitet, Malmö högskola, Institutionen för vårdvetenskap (VV), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-40558.

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Bakgrund: I Sverige avlider varje år cirka 600 män och 200 kvinnor till följd av ett brustet abdominalt aortaaneurysm. Mellan 1.5 och 4.0 procent av alla män över 65 år drabbas av ett abdominalt aortaaneurysm och sedan år 2015 erbjuds samtliga 65-åriga män screening för aortaaneurysm. De som diagnostiseras är således vanligen äldre personer, och i takt med stigande ålder ökar även risken att drabbas av andra sjukdomar. Patientgruppen kan därför vårdas på olika typer av vårdavdelningar, vilket gör att den grundutbildade sjuksköterskan kan möta dessa patienter på många olika vårdinstanser. För att kunna ge en god och personcentrerad vård krävs en förståelse för patienternas upplevelser relaterat till sitt aneurysm samt hur det påverkar det dagliga livet för patienterna.  Syfte: Litteraturöversiktens syfte var att beskriva vuxna patienters upplevelser relaterat till deras abdominala aortaaneurysm, både under konservativ behandling samt postoperativt och hur det påverkar det dagliga livet. Metod: Litteraturöversikten är baserad på tolv vetenskapliga artiklar med kvalitativ studiedesign. Artiklarna hämtades från tre olika databaser med medicin- och omvårdnadsfokus och analyserades därefter induktivt med en förenklad form av metasyntes. Resultat: Fem huvudkategorier och sju underkategorier av upplevelser hos patienter identifierades. Huvudkategorierna var: upplevelser kring behovet av information; upplevelser av att kunna lita på hälso- och sjukvården; oro, rädsla och ångest relaterat till AAA; AAAs påverkan på det dagliga livet; och möjlighet att vara delaktig i vårdprocessen. Konklusion: Litteraturöversikten visade att AAA upplevs med stor variation av patienter. Men framförallt upplever patienter en brist i information och kunskap om sitt AAA där ytterligare stöd, information och kunskap önskas av patienter.  Nyckelord: Abdominalt aortaaneurysm, Dagligt liv, Patienter, Personcentrerad vård, Upplevelser
Background: In Sweden, approximately 600 men and 200 women die each year as a result of a ruptured abdominal aortic aneurysm. Between 1.5 and 4.0 percent of all men over the age of 65 years suffer from an abdominal aortic aneurysm and since year 2015, all 65-years-old men have been offered a screening for aortic aneurysm. Those who are diagnosed are thus elderly and alongside an increasing age, the risk of being subject to other diseases also increases. The patient group can therefore be cared for in different types of care wards, which means that the undergraduate nurse can meet these patients in many different care institutions. In order to be able to provide good and person-centred care, an understanding of the patients' experiences of their aneurysm, and how it affects their daily lives, is required. Aim: The aim of this literature study was to describe adult patients' experiences related to abdominal aortic aneurysm, both during conservative treatment and postoperatively and how it affects daily life. Method: A literature study which is based on twelve scientific articles with qualitative study design. The articles were retrieved from three different databases with a focus on medicine and nursing and were thereafter analysed inductively with a simplified form of metasynthesis. Result: Five main categories and seven subcategories of patient experiences were identified. The main categories were: experiences around the need for information; experiences of being able to trust the health care; worry, fear and anxiety related to AAA; AAA's impact on daily life; and the possibility to be involved in the care process. Conclusion: The literature review shows that AAA is experienced with a large variety of patients. But above all, patients experience a lack of information and knowledge about their AAA where further support, information and knowledge is desired by patients.  Keywords: Abdominal aortic aneurysm, Daily life, Experiences, Patients, Person-centred care.
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Libros sobre el tema "Central aortic"

1

Central Aortic Blodd Pressure (French Edition). ELSEVIER-MASSON, 2008.

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Tribouilloy, Christophe, Patrizio Lancellotti, Ferande Peters, José Juan Gómez de Diego y Luc A. Pierard. Heart valve disease (aortic valve disease): aortic regurgitation. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198726012.003.0033.

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Echocardiography is the cornerstone examination for the assessment of aortic regurgitation (AR): it provides reliable evaluation of the aortic valve and allows diagnosis and identification of the mechanism of regurgitation. The specific aetiology of the disease can be identified in the majority of cases. A combination of quantitative and quantitative Doppler and two-dimensional (2D) echocardiographic parameters allows the evaluation of the severity of AR and determination of the haemodynamic and left ventricular function repercussions. Echocardiography allows the detection of associated lesions of the aortic root or other valves. In symptomatic patients, echocardiography is essential to confirm the severity of AR. In asymptomatic patients with moderate or severe AR, echocardiography is essential for regular follow-up, by providing precise and reproducible measurements of LV dimensions and function, and for identifying patients who should be considered for elective surgical intervention. In most cases, transthoracic echocardiography (TTE) provides all of the necessary information and transoesophageal echocardiography in usually not required. Real-time three-dimensional (3D) TTE can be complementary to 2D echocardiography for the assessment of the mechanism and quantification of AR by increasing the level of confidence, especially when 2D echocardiographic data are inconclusive or discordant with clinical findings. Tissue Doppler imaging and especially the speckle tracking method are promising approaches to detect early LV dysfunction in patients with asymptomatic severe AR. Echocardiography is therefore the key examination for the assessment of AR and at the centre of the strategic discussion concerning the indications and timing of surgery.
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Kahn, S. Lowell. Subintimal Arterial Recanalization Using the Bull’s-Eye Technique. Editado por S. Lowell Kahn, Bulent Arslan y Abdulrahman Masrani. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199986071.003.0015.

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Antegrade retrograde revascularization is invaluable to the interventionalist, but is commonly complicated by the two catheters/wires lying in different planes and/or lumens relative to one another. This chapter describes the “bull’s-eye” technique with use of the Outback® LTD® Re-Entry Catheter (Cordis Corp., Milpitas, CA) steered toward a specific target, most commonly a snare to connect the two accesses. Although a snare the most commonly used target, this technique has been employed using a balloon or catheter as the target for the Outback®. This technique is widely applicable for large (aortic) to small (tibial) vessel revascularizations. It has also been employed successfully with challenging chronic central and peripheral venous occlusions.
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Capítulos de libros sobre el tema "Central aortic"

1

Williams, Bryan y Peter S. Lacy. "Central Aortic Pressure: The Next Frontier in Blood Pressure Measurement?" En Special Issues in Hypertension, 181–97. Milano: Springer Milan, 2012. http://dx.doi.org/10.1007/978-88-470-2601-8_15.

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Metshein, Margus, Hip Kõiv, Paul Annus y Mart Min. "Electrode Optimization for Bioimpedance Based Central Aortic Blood Pressure Estimation". En IFMBE Proceedings, 497–501. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-9038-7_92.

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Krämer, G., R. Erbel, M. Tophof, S. Mohr-Kahaly y G. Zenker. "Mitral and Aortic Valve Prolapse in Younger Patients with Cerebral Ischemic Events - Results of a Prospective Study with Transthoracal and Transesophageal Echocardiography". En Central Nervous System Control of the Heart, 261–65. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2327-3_26.

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Huan, Yonghong, Debbie L. Cohen y Raymond R. Townsend. "Central Aortic Pressure, Arterial Compliance: Emerging Tools to Identify and Guide Therapy for High-Risk African American Patients". En Hypertension in High Risk African Americans, 151–61. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-2010-5_10.

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Kim, Mi Ok, Per K. Eide, Michael F. O’Rourke, Audrey Adji y Alberto P. Avolio. "Intracranial Pressure Waveforms are More Closely Related to Central Aortic than Radial Pressure Waveforms: Implications for Pathophysiology and Therapy". En Acta Neurochirurgica Supplement, 61–64. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22533-3_12.

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KK, Mitra y Sur K. "Central Aortic Blood Pressure: Implication in Clinical Practice". En CSI: Cardiology Update 2015 (2 Volumes), 95. Jaypee Brothers Medical Publishers (P) Ltd., 2016. http://dx.doi.org/10.5005/jp/books/12785_17.

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Venugopal, K., George Koshy y Bahekar D. "Central Aortic Blood Pressure Evaluation for Hypertension in Cardiodiabetics". En Cardiodiabetes Update: A Textbook of Cardiology, 331. Jaypee Brothers Medical Publishers (P) Ltd., 2018. http://dx.doi.org/10.5005/jp/books/14130_50.

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Yao, Yang, Lu Wang, Liling Hao, Lisheng Xu, Shuran Zhou y Wenyan Liu. "The Noninvasive Measurement of Central Aortic Blood Pressure Waveform". En Blood Pressure - From Bench to Bed. InTech, 2018. http://dx.doi.org/10.5772/intechopen.76770.

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Ram, C. "Chapter-103 Central Aortic Blood Pressure as a Prognostic Marker in Hypertension". En Cardiological Society of India Cardiology Update 2014, 661–66. Jaypee Brothers Medical Publishers (P) Ltd., 2015. http://dx.doi.org/10.5005/jp/books/12415_104.

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Tornos Mas, Pilar y Emmanuel Lansac. "Aortic regurgitation". En ESC CardioMed, editado por Helmut Baumgartner, 1634–41. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0765.

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Evaluation of aortic regurgitation requires consideration of valve morphology, mechanism and severity of regurgitation and assessment of aortic dilatation. In asymptomatic patients with severe aortic regurgitation, follow-up of symptomatic status and LV size and function is mandatory. The strongest indication for valve surgery is the presence of symptoms and/or the documentation of LVEF <50% and/or end-systolic diameter =50 mm. In patients with dilated aorta, definition of aortic pathology and accurate measurements of aortic diameters are crucial. Surgery is recommended whenever aortic dilation is = 55 mm or = 50 mm in patients with bicuspid aortic valves and Marfan syndrome or =45 mm when additional risk factors are present. For patients who have an indication for valve surgery, an aortic diameter of ≥45 mm is considered to indicate concomitant surgery of the aorta. Aortic valve repair and valve-sparing aortic surgery instead of aortic valve replacement should be considered in selected cases in experienced centres.
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Actas de conferencias sobre el tema "Central aortic"

1

Jiang, Sheng, Zhi-Qiang Zhang y Jian-Kang Wu. "Human Arteries Modeling and Central Aortic Pressure Estimation". En 2013 International Conference on Computational Problem-solving (ICCP). IEEE, 2013. http://dx.doi.org/10.1109/iccps.2013.6893593.

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Ghasemi, Zahra, Chang-Sei Kim, Eric Ginsberg, John Duell, Anuj Gupta y Jin-Oh Hahn. "Estimation of Central Aortic Blood Pressure From Non-Invasive Cuff Pressure Oscillation Signals via System Identification". En ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9785.

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This paper presents a model-based system identification approach to estimation of central aortic blood pressure waveform from non-invasive cuff pressure oscillation signals. First, we developed a mathematical model that can reproduce the relationship between central aortic blood pressure waveform and non-invasive cuff pressure oscillation signals at diametric locations by combining models to represent wave propagation in the artery, arterial pressure-volume relationship, and mechanics of the occlusive cuff. Second, we formulated the problem of estimating central aortic blood pressure waveform from non-invasive cuff pressure oscillation signals into a system identification problem. Third, we showed the proof-of-concept of the approach using simulated central aortic blood pressure waveform and cuff pressure oscillation signals. Finally, we illustrated the feasibility of the approach using central aortic blood pressure waveform and cuff pressure oscillation signals collected from a human subject. We showed that the proposed approach could estimate central aortic blood pressure waveform with accuracy: the root-mean-squared error associated with the central aortic blood pressure waveform was 1.7 mmHg (amounting to 1.6 % of the underlying mean blood pressure) while the errors associated with central aortic systolic and pulse pressures were −0.4 mmHg and −1.5 mmHg (amounting to −0.3 % and −1.4 % of the underlying mean blood pressure).
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Hahn, Jin-Oh, Andrew Reisner, Horacio Hojman y H. Harry Asada. "Reconstruction of Central Aortic Pressure Waveform Using Adaptive Multi-Channel Identification". En Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.4398172.

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Hahn, Jin-Oh, Andrew Reisner, Horacio Hojman y H. Harry Asada. "Reconstruction of Central Aortic Pressure Waveform Using Adaptive Multi-Channel Identification". En Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.259894.

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Schwarz, Chaid y Madhavan L. Raghavan. "Radial Compressive Properties of an Aortic Stent Graft". En ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80889.

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The long-term fixation characteristics of stent grafts used to treat aortic aneurysms are likely related to the nature of its apposition to the aortic wall after deployment. But we only have a rudimentary understanding of the mechanisms involved and the factors that determine the nature of deployment of these implants. One factor that has been shown to be of particular relevance is oversizing — the % difference between the size of the graft to that of the aorta in which it is deployed (oversizing implies the former is larger) [1]. Other proposed factors include the angulation in the aortic neck and stent design. Naturally, issues of mechanics are central to this problem. Computational models of the mechanics involved, if developed with rigor, can be useful for gaining insights into the mechanisms involved and for interrogating the interactions among these multiple factors.
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Rashedi, Mohammad, Nima Fazeli, Alyssa Chappell, Shaohua Wang, Roderick MacArthur, M. Sean McMurtry, Barry Finegan y Jin-Oh Hahn. "Modeling and System Identification of Arterial Hemodynamics in Humans". En ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3848.

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This paper seeks to determine the validity of two distinct tube-load models relating central aortic blood pressure to peripheral blood pressure in humans. Specifically a single-tube model (1-TL) and a serially connected two-tube (2-TL) model, both terminating in a Windkessel load, are considered as representations of the central aortic-peripheral arterial path. The validity and fidelity of the two models was assessed and compared quantitatively by fitting central aortic, radial and femoral blood pressures collected from 8 patients. Both models fitted the BP waveform pairs effectively, and were capable of estimating pulse travel time (PTT) accurately; also the model derived frequency responses were close to the empiric transfer function estimates derived from central and peripheral BP measurements. The 2-TL model was consistently better than 1-TL with statistical significance in terms of accuracy of the central aortic BP waveform, the average waveform RMSE were 2.52 mmHg versus 3.24 mmHg respectively (p<0.05).
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Mukkamala, Ramakrishna, Jacob Kuiper, Javier A. Sala-Mercado, Robert L. Hammond, Jong-Kyung Kim, Larry W. Stephenson y Donal S. O'Leary. "Continuous Left Ventricular Ejection Fraction Monitoring by Central Aortic Pressure Waveform Analysis". En Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.4397477.

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Mukkamala, Ramakrishna, Jacob Kuiper, Javier A. Sala-Mercado, Robert L. Hammond, Jong-Kyung Kim, Larry W. Stephenson y Donal S. O'Leary. "Continuous Left Ventricular Ejection Fraction Monitoring by Central Aortic Pressure Waveform Analysis". En Conference Proceedings. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2006. http://dx.doi.org/10.1109/iembs.2006.260539.

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Wiard, R. M., Hyun Jin Kim, C. A. Figueroa, G. T. A. Kovacs, C. A. Taylor y L. Giovangrandi. "Estimation of central aortic forces in the ballistocardiogram under rest and exercise conditions". En 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 2009. http://dx.doi.org/10.1109/iembs.2009.5333577.

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Ning Ji, Wan-Hua Lin, Wenyan Liu, Jianping Huang, Yuanheng Li, O. W. Samuel, Lisheng Xu y Guanglin Li. "Central aortic pressure waveform estimation using genetic-algorithm-based multichannel blind system identification". En 2019 Intelligent Rehabilitation and Human-machine Engineering Conference (IRHE-2019). Institution of Engineering and Technology, 2019. http://dx.doi.org/10.1049/cp.2019.1202.

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