Impaired dynamic cerebral autoregulation and cerebrovascular reactivity in middle cerebral artery stenosis

We sought to investigate the capacity of cerebral autoregulation and cerebrovascular reactivity (CVR) in patients with middle cerebral artery (MCA) stenosis. Twenty-one patients with MCA stenosis diagnosed by magnetic resonance angiography and 15 healthy controls were enrolled. Cerebral autoregulati...

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Veröffentlicht in:PloS one 2014-02, Vol.9 (2), p.e88232-e88232
Hauptverfasser: Chen, Jie, Liu, Jia, Xu, Wei-Hai, Xu, Ren, Hou, Bo, Cui, Li-Ying, Gao, Shan
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Liu, Jia
Xu, Wei-Hai
Xu, Ren
Hou, Bo
Cui, Li-Ying
Gao, Shan
description We sought to investigate the capacity of cerebral autoregulation and cerebrovascular reactivity (CVR) in patients with middle cerebral artery (MCA) stenosis. Twenty-one patients with MCA stenosis diagnosed by magnetic resonance angiography and 15 healthy controls were enrolled. Cerebral autoregulation was assessed by autoregulatory parameters (rate of recovery/phase/gain) derived from transfer function from spontaneous oscillations of cerebral blood flow velocity and blood pressure. CVR was tested by a rebreathing maneuver. Rate of recovery, phase and CVR estimated from moderate MCA stenosis (rate of recovery  = 17.76 ± 8.21%/s, phase  = 26.93 ± 15.67°, and CVR  = 1.53 ± 0.84%/mmHg, respectively) were significantly different (p
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Twenty-one patients with MCA stenosis diagnosed by magnetic resonance angiography and 15 healthy controls were enrolled. Cerebral autoregulation was assessed by autoregulatory parameters (rate of recovery/phase/gain) derived from transfer function from spontaneous oscillations of cerebral blood flow velocity and blood pressure. CVR was tested by a rebreathing maneuver. Rate of recovery, phase and CVR estimated from moderate MCA stenosis (rate of recovery  = 17.76 ± 8.21%/s, phase  = 26.93 ± 15.67°, and CVR  = 1.53 ± 0.84%/mmHg, respectively) were significantly different (p&lt;0.05) from controls (rate of recovery  = 39.62 ± 27.99%/s, phase  = 55.66 ± 22.10°, and CVR = 2.18 ± 0.80%/mmHg, respectively). Rate of recovery (r = -0.698, p&lt;0.001), phase (r = -0.738, p&lt;0.001)) and CVR (r = -0.690, p&lt;0.001) were all significantly correlated with the degree of stenosis. Cerebral autoregulation and CVR were impaired in patients with ≥ 50% MCA stenosis. 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Twenty-one patients with MCA stenosis diagnosed by magnetic resonance angiography and 15 healthy controls were enrolled. Cerebral autoregulation was assessed by autoregulatory parameters (rate of recovery/phase/gain) derived from transfer function from spontaneous oscillations of cerebral blood flow velocity and blood pressure. CVR was tested by a rebreathing maneuver. Rate of recovery, phase and CVR estimated from moderate MCA stenosis (rate of recovery  = 17.76 ± 8.21%/s, phase  = 26.93 ± 15.67°, and CVR  = 1.53 ± 0.84%/mmHg, respectively) were significantly different (p&lt;0.05) from controls (rate of recovery  = 39.62 ± 27.99%/s, phase  = 55.66 ± 22.10°, and CVR = 2.18 ± 0.80%/mmHg, respectively). Rate of recovery (r = -0.698, p&lt;0.001), phase (r = -0.738, p&lt;0.001)) and CVR (r = -0.690, p&lt;0.001) were all significantly correlated with the degree of stenosis. Cerebral autoregulation and CVR were impaired in patients with ≥ 50% MCA stenosis. 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The measures of both hemodynamic properties were inversely correlated with the stenotic degree.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24505442</pmid><doi>10.1371/journal.pone.0088232</doi><tpages>e88232</tpages><oa>free_for_read</oa></addata></record>
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subjects Angiography
Biology
Blood
Blood flow
Blood Flow Velocity - physiology
Blood pressure
Blood Pressure - physiology
Carbon dioxide
Carotid arteries
Carotid Stenosis - physiopathology
Cerebral blood flow
Cerebral Cortex - physiopathology
Cerebrovascular Circulation - physiology
Cerebrovascular system
Female
Flow velocity
Hemodynamics
Hemodynamics - physiology
Homeostasis - physiology
Hospitals
Humans
Hypertension
Magnetic resonance
Male
Measurement techniques
Medical imaging
Medical research
Medicine
Middle Aged
Middle Cerebral Artery - physiopathology
Neurology
Oscillations
Patients
Physiology
Rebreathing
Recovery
Stenosis
Stroke
Studies
Transfer functions
Veins & arteries
title Impaired dynamic cerebral autoregulation and cerebrovascular reactivity in middle cerebral artery stenosis
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