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Статті в журналах з теми "Dynamic Cerebral Autoregulation"
Beishon, L., JS Minhas, R. Nogueira, P. Castro, C. Budgeon, M. Aries, S. Payne, TG Robinson, and RB Panerai. "INFOMATAS multi-center systematic review and meta-analysis individual patient data of dynamic cerebral autoregulation in ischemic stroke." International Journal of Stroke 15, no. 7 (February 24, 2020): 807–12. http://dx.doi.org/10.1177/1747493020907003.
Повний текст джерелаPanerai, Ronney B. "Nonstationarity of dynamic cerebral autoregulation." Medical Engineering & Physics 36, no. 5 (May 2014): 576–84. http://dx.doi.org/10.1016/j.medengphy.2013.09.004.
Повний текст джерелаSecher, Niels H., and Johannes J. van Lieshout. "Dynamic Cerebral Autoregulation and Monitoring Cerebral Perfusion." Hypertension 56, no. 2 (August 2010): 189–90. http://dx.doi.org/10.1161/hypertensionaha.110.154971.
Повний текст джерелаSchondorf, Ronald, Reuben Stein, Richard Roberts, Julie Benoit, and William Cupples. "Dynamic cerebral autoregulation is preserved in neurally mediated syncope." Journal of Applied Physiology 91, no. 6 (December 1, 2001): 2493–502. http://dx.doi.org/10.1152/jappl.2001.91.6.2493.
Повний текст джерелаNishimura, Naoko, Ken-ichi Iwasaki, Yojiro Ogawa, and Ken Aoki. "Decreased steady-state cerebral blood flow velocity and altered dynamic cerebral autoregulation during 5-h sustained 15% O2 hypoxia." Journal of Applied Physiology 108, no. 5 (May 2010): 1154–61. http://dx.doi.org/10.1152/japplphysiol.00656.2009.
Повний текст джерелаSchondorf, Ronald, Julie Benoit, and Reuben Stein. "Cerebral autoregulation is preserved in postural tachycardia syndrome." Journal of Applied Physiology 99, no. 3 (September 2005): 828–35. http://dx.doi.org/10.1152/japplphysiol.00225.2005.
Повний текст джерелаOgawa, Yojiro, Ken Aoki, Jitsu Kato, and Ken-ichi Iwasaki. "Differential effects of mild central hypovolemia with furosemide administration vs. lower body suction on dynamic cerebral autoregulation." Journal of Applied Physiology 114, no. 2 (January 15, 2013): 211–16. http://dx.doi.org/10.1152/japplphysiol.00741.2012.
Повний текст джерелаWHITE, R. P., P. VALLANCE, and H. S. MARKUS. "Effect of inhibition of nitric oxide synthase on dynamic cerebral autoregulation in humans." Clinical Science 99, no. 6 (November 21, 2000): 555–60. http://dx.doi.org/10.1042/cs0990555.
Повний текст джерелаParthasarathy, Ashwin B., Kimberly P. Gannon, Wesley B. Baker, Christopher G. Favilla, Ramani Balu, Scott E. Kasner, Arjun G. Yodh, John A. Detre, and Michael T. Mullen. "Dynamic autoregulation of cerebral blood flow measured non-invasively with fast diffuse correlation spectroscopy." Journal of Cerebral Blood Flow & Metabolism 38, no. 2 (December 12, 2017): 230–40. http://dx.doi.org/10.1177/0271678x17747833.
Повний текст джерелаElting, Jan Willem J., Jeanette Tas, Marcel JH Aries, Marek Czosnyka, and Natasha M. Maurits. "Dynamic cerebral autoregulation estimates derived from near infrared spectroscopy and transcranial Doppler are similar after correction for transit time and blood flow and blood volume oscillations." Journal of Cerebral Blood Flow & Metabolism 40, no. 1 (October 24, 2018): 135–49. http://dx.doi.org/10.1177/0271678x18806107.
Повний текст джерелаДисертації з теми "Dynamic Cerebral Autoregulation"
Haunton, Victoria Joanna. "Is dynamic cerebral autoregulation impaired in idiopathic Parkinson's disease?" Thesis, University of Leicester, 2014. http://hdl.handle.net/2381/28752.
Повний текст джерелаKrishnamurthy, Shantha Arcot. "CARDIO-RESPIRATORY INFLUENCE ON DYNAMIC CEREBRAL AUTOREGULATION DURING HEAD UP TILT MEDIATED PRESYNCOPE." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_theses/196.
Повний текст джерелаMoore, Stephen Michael. "Computational 3D Modelling of Hemodynamics in the Circle of Willis." Thesis, University of Canterbury. Mechanical Engineering, 2007. http://hdl.handle.net/10092/1168.
Повний текст джерелаJiang, Zong-Xun, and 江宗勳. "The Assessment of Dynamic Cerebral Autoregulation in Diabetes Using Linear Analysis." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/d2q2ca.
Повний текст джерела逢甲大學
自動控制工程所
90
Abstract In recent years, stroke is the third leading cause of mortality in Taiwan. One of the most important factors contributing to stroke is the regulation of cerebral blood flow (CBF) which is influenced by cerebral autoregulation (CA). Most of clinical instruments for detecting CBF (such as MRI, PET) are very expensive and not suitable for continuous movement. In this study, the arterial blood pressure (ABP) and cerebral blood flow velocity (CBFV) were continuously measured by Finapres and transcranial Doppler (TCD) respectively during the supine and tilt-up positions. The mean arterial blood pressure (MABP) and mean cerebral blood flow velocity (MCBFV) time series were calculated. Ten healthy adults, ten diabetes without autonomic neuropathy, and ten with autonomic neuropathy (sex and age matched) were examined in this study. The CA model was analyzed by linear analysis in time-domain, frequency-domain and time-frequency domain of clinical real-time data of ABP and CBF. The main purpose of this study is to use noninvasive and signal processing techniques to observe the fluctuations between the ABP and CBFV. The results of time-domain analysis show that MABP of diabetic autonomic neuropathy (DAN) (supine:91.55□14.85 mmHg, tilt-up:74.12□13.35 mmHg) decrease significantly during tilt-up than that of healthy adults (supine:88.83□9.17 mmHg, tilt-up:93.97□11.39 mmHg). In addition, the results of cluster analysis based on distance measurement using the scattered plot between MABP and MCBFV show that DAN (supine-tilt-up mean:20.00□6.22, tilt-up-supine mean:20.10□6.09, supine mean-tilt-up mean:19.71□6.17) larger than healthy adults (supine-tilt-up mean:12.45□6.00, tilt-up-supine mean:12.66□5.70, supine mean-tilt-up mean:10.88□7.00). To observe the results of autoregulation curve analysis, the slope of DAN (slope between supine mean-tilt-up mean:1.34□2.66) also larger than healthy adults (slope between supine mean-tilt-up mean:0.87□0.15). Finally, the results of frequency-domain analysis show that the fluctuations of DAN both in MABP and MCBFV are significantly smaller than that of healthy adults. It can obtain similar results form other linear analysis. Linear analysis exhibits significantly different between healthy adults and DAN. The results are helpful for clinical practice and can provide critical information for physicians. Keywords:cerebral autoregulation, noninvasive, linear analysis
Chou, Chih-Che, and 周志哲. "Assessment of Dynamic Cerebral Autoregulation Using Resting Blood Oxygenation Level Dependent Based Functional MRI." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/12546992994835323800.
Повний текст джерела國立陽明大學
放射醫學科學研究所
94
Purpose: Dynamic cerebral auto-regulation (DCA) is a key ingredient in functional magnetic resonance imaging (fMRI) studies based on blood oxygenation level dependent (BOLD) response. The delay time estimation by cross-spectral analysis between the physiological signals such as the relation between cerebral blood flow (CBF) and arterial blood pressure (aBP) has been widely used as an index of DCA mechanism. By simultaneous recording of the physiological activities during fMRI acquisition, we can detect and quantify spontaneous fluctuations in BOLD signals and link up these fluctuations with DCA mechanism. Materials and Methods: Eight subjects were recruited for 5-min resting fMRI scan in a 3.0 Tesla system using a single-slice echo planar imaging sequence. Heart beat, respiration, and aBP were simultaneously monitored during data acquisition. The delay time between BOLD and physiological signals was investigated by using cross-spectral analysis including coherence function and phase spectra. On the basis of phase spectra with the significant coherence in the each frequency range, phase delays were evaluated as arriving time delays between them in the observed slice. Group delay can be calculated by the slope of best-fit regression line in the estimated phase spectra. Results: Our results are in line with previous findings from the signals of aBP or CBF, and found that inherent BOLD resting fluctuations comprising very low frequency (VLF, less than 0.04 Hz), low frequency (LF, 0.04 to 0.15 Hz), respiratory component, so called high frequency (HF, 0.15 to 0.4 Hz), and first plus second harmonic peak of heart rate in all subjects. The BOLD resting rhythms are spatially consistent across subjects and distribute close to blood vessels, sinus and cerebral spinal fluid pools regions. High coherence in the LF, HF, and heart rate (> 0.5), but it was not the case for the VLF component. Inconsistent phase delays in the each frequency range between the pixels were observed in the phase spectra. For further linear regression analysis, The r values in the HF and cardiac ranges with significant coherences were fair (r = 0.02 ± 0.08 and 0.08 ± 0.31; mean ± standard deviation). A high r value in the LF range (r = -0.58 ± 0.08) suggested the LF fluctuations in the BOLD signals lag behind those in aBP signals about 1.89 ± 0.62 seconds. Conclusion: Cross-spectrum analysis provides a good relation between BOLD and aBP signals along each frequency ranges. First, high coherence except VLF range (> 0.5) indicates great similarity between BOLD and pressure signals. Second, inconsistent phase delays between the pixels imply that the physiological signals may be mixed in a convolutive manner with non-zero delay. Third, group delay in the estimated phase spectra revealed a good frequency-dependent relationship in the LF range only, and LF fluctuations in the BOLD signals lagged behind those in aBP signals about 1.89 ± 0.62 seconds. We conclude that group delay from BOLD-pressure relation in the LF range may carry information on non-invasively assessing spatial distribution of focal DCA mechanism in adult brain.
Tsai, Yu-Chou, and 蔡育周. "Using Nonlinear Analysis for Assessment of Dynamic Cerebral Autoregulation in Diabetes with Autonomic Neuropathy." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/x594mt.
Повний текст джерела逢甲大學
自動控制工程所
91
The cerebral autoregulation (CA) mechanism refers to the cerebral blood flow (CBF) tendency to maintain relatively constant in the brain despite changes in mean arterial blood pressure (MABP). The main purpose of this study is to use chaotic analysis approaches to analyze the blood pressure and cerebral blood flow between 11 age-matched normal subjects and 19 diabetics with autonomic neuropathy. MABP in the finger via Finapres and mean cerebral blood flow velocity (MCBFV) of the middle cerebral artery via transcranial doppler (TCD) ultrasound were measured continuously during supine and tilt-up positions each for 5 minutes in both normals and patients. The results showed that the correlation dimension (CD) values of MABP in diabetics subjects (MABP supine: 3.688±2.289; MABP tilt-up: 2.145±1.239; p<0.01, paired t-test) decreased with statistical significance between supine and tilt-up positions. On the other hand, CD values of MABP between normals and patients in supine position (MABP in normals: 2.012±0.775; MABP in patients: 3.688±2.289; p<0.05) were significantly different. The CD of MCBFV remained no change. The Lyapunov exponent (LE) in MABP between normals and patinents in supine position (Normals: 1.704±0.995; Patients: 1.016±0.415; p<0.05) and MCBFV in patients between supine and tilt-up positions (Supine: 1.058±0.333; Tilt-up: 0.797±0.382; p<0.05) were different with statistical significance. The Kolmogorov entropy (K2) values in both the normal subjects and diabetics were not statistically significant. The only difference is that the K2 values of MCBFV between normals and diabetics in tilt-up positions were significantly different (Normals: 2.835±0.461, Patients: 3.323±0.568; p<0.05). It can be concluded that the CD, LE, and K2 nonlinear measures are suitable tools to explore the nonlinear analysis of dynamic CA.
Частини книг з теми "Dynamic Cerebral Autoregulation"
Levine, Benjamin D., Rong Zhang, and Robert C. Roach. "Dynamic Cerebral Autoregulation at High Altitude." In Advances in Experimental Medicine and Biology, 319–22. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4711-2_24.
Повний текст джерелаTurova, Varvara, Nikolai Botkin, Ana Alves-Pinto, Tobias Blumenstein, Esther Rieger-Fackeldey, and Renée Lampe. "Modeling Autoregulation of Cerebral Blood Flow Using Viability Approach." In Advances in Dynamic and Mean Field Games, 345–63. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70619-1_16.
Повний текст джерелаChacón, Max, Cristopher Blanco, Ronney Panerai, and David Evans. "Nonlinear Modeling of Dynamic Cerebral Autoregulation Using Recurrent Neural Networks." In Lecture Notes in Computer Science, 205–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11578079_22.
Повний текст джерелаChacón, Max, Darwin Diaz, Luis Ríos, David Evans, and Ronney Panerai. "Support Vector Machine with External Recurrences for Modeling Dynamic Cerebral Autoregulation." In Lecture Notes in Computer Science, 954–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11892755_99.
Повний текст джерелаChacón, Max, Sun-Ho Noh, Jean Landerretche, and José L. Jara. "Comparing Models of Spontaneous Variations, Maneuvers and Indexes to Assess Dynamic Cerebral Autoregulation." In Acta Neurochirurgica Supplement, 159–62. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-65798-1_33.
Повний текст джерелаOrtega-Gutierrez, S., E. A. Samaniego, A. Reccius, A. Huang, B. Zheng-Lin, A. Masukar, R. S. Marshall, and N. H. Petersen. "Changes on Dynamic Cerebral Autoregulation Are Associated with Delayed Cerebral Ischemia in Patients with Aneurysmal Subarachnoid Hemorrhage." In Acta Neurochirurgica Supplement, 149–53. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04615-6_22.
Повний текст джерелаJara, José L., Nazia P. Saeed, Ronney B. Panerai, and Thompson G. Robinson. "Increasing the Contrast-to-Noise Ratio of MRI Signals for Regional Assessment of Dynamic Cerebral Autoregulation." In Acta Neurochirurgica Supplement, 153–57. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-65798-1_32.
Повний текст джерелаTanaka, Kortaro, Yasuo Fukuuchi, Toshitaka Shirai, Shigeru Nogawa, Hiroyuki Nozaki, Eiichiro Nagata, Taro Kondo, Satoshi Koyama, and Tomohisa Dembo. "Role of Nitric Oxide in Autoregulation of Cerebral Blood Flow in the Rat." In Oxygen Homeostasis and Its Dynamics, 609–15. Tokyo: Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-68476-3_79.
Повний текст джерелаLiu, J., D. M. Simpson, and R. Allen. "Tracking the Dynamics of the Cerebral Autoregulation Response to Sudden Changes of PaCO2." In IFMBE Proceedings, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03882-2_1.
Повний текст джерелаТези доповідей конференцій з теми "Dynamic Cerebral Autoregulation"
Kostoglou, Kyriaki, Alexander D. Wright, Jonathan D. Smirl, Kelsey Bryk, Paul van Donkelaar, and Georgios D. Mitsis. "Dynamic cerebral autoregulation in young athletes following concussion." In 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2016. http://dx.doi.org/10.1109/embc.2016.7590797.
Повний текст джерелаKainerstorfer, Jana M., Angelo Sassaroli, Kristen T. Tgavalekos, and Sergio Fantini. "Dynamic cerebral autoregulation measured with coherent hemodynamics spectroscopy (CHS)." In SPIE BiOS, edited by Bruce J. Tromberg, Arjun G. Yodh, Eva M. Sevick-Muraca, and Robert R. Alfano. SPIE, 2015. http://dx.doi.org/10.1117/12.2077816.
Повний текст джерелаManikandan, S., Arulvelan A., and Ramesh Rathod. "Dynamic cerebral autoregulation following loading dose of Dexmedetomidine; A transcranial doppler study." In 15th Annual Conference of the Indian Society of Neuroanaesthesiology and Critical Care. Thieme Medical and Scientific Publishers Private Ltd., 2015. http://dx.doi.org/10.1055/s-0038-1667527.
Повний текст джерелаOlufsen, Mette S., Lewis A. Lipsitz, and Ali Nadim. "A Lumped Parameter Model for Cerebral Blood Flow Regulation." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/bed-23138.
Повний текст джерелаRuesch, Alexander, Jason Yang, Deepshikha Acharya, Samantha Schmitt, Matthew A. Smith, and Jana M. Kainerstorfer. "Comparison of Dynamic and Static Assessment of Cerebral Autoregulation in Non-Human Primates." In Optical Tomography and Spectroscopy. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/ots.2020.stu2d.3.
Повний текст джерелаSelb, Juliette, Susanne Muehlschlegel, Solomon G. Diamond, Maria Angela Franceschini, Lee H. Schwamm, and David A. Boas. "Disruption of Dynamic Cerebral Autoregulation in Ischemic Stroke Patients Assessed by Continuous-Wave NIRS." In Biomedical Optics. Washington, D.C.: OSA, 2008. http://dx.doi.org/10.1364/biomed.2008.bsud4.
Повний текст джерелаTian, Fenghua, Takashi Tarumi, Hanli Liu, Rong Zhang, and Lina Chalak. "Assessment of Dynamic Cerebral Autoregulation in Neonatal Hypoxic-Ischemic Encephalopathy Based on Wavelet Transform Coherence." In Cancer Imaging and Therapy. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/cancer.2016.jw3a.36.
Повний текст джерелаFurian, M., M. Ulliel-Roche, C. A. Howe, F. Zerizer, M. Marillier, A. Bernard, I. Hancco, et al. "Comparison of dynamic cerebral autoregulation and cardiac baroreceptor sensitivity between residents living at different altitudes." In ERS International Congress 2022 abstracts. European Respiratory Society, 2022. http://dx.doi.org/10.1183/13993003.congress-2022.1073.
Повний текст джерелаMahmic, Alma, Fatimah Ibrahim, and Maw Pin Tan. "Mathematical frameworks to assess the dynamics of cerebral autoregulation." In 2012 IEEE EMBS Conference on Biomedical Engineering and Sciences (IECBES 2012). IEEE, 2012. http://dx.doi.org/10.1109/iecbes.2012.6498186.
Повний текст джерелаParthasarathy, Ashwin B., Kimberly Gannon, Wesley B. Baker, Venki Kavuri, Michael T. Mullen, John A. Detre, and Arjun G. Yodh. "Cerebral Autoregulation Dynamics with High-Speed Diffuse Correlation Spectroscopy." In Optics and the Brain. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/brain.2016.bth4d.7.
Повний текст джерелаЗвіти організацій з теми "Dynamic Cerebral Autoregulation"
Wang, Kai, Zhiguo Lv, Peng Xu, Baitong Wang, Aanqi Hou, Tianye Lan, Dongmei Zhang, and Jian Wang. Relevance of dynamic cerebral autoregulation after acute ischemic stroke with prognosis: A protocol for systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, January 2022. http://dx.doi.org/10.37766/inplasy2022.1.0056.
Повний текст джерела