Differentiating Dynamic Cerebral Autoregulation Across Vascular Territories
نویسندگان
چکیده
منابع مشابه
Dynamic cerebral autoregulation and monitoring cerebral perfusion.
Cerebral autoregulation (CA) describes the capability of the brain to maintain its flow as relatively stable over a wide rage of mean arterial pressures (MAPs), for example, from 60 to 150 mm Hg. Because the brain is encompassed in the skull, CA is vital for preventing cerebral edema and hemorrhage, as illustrated in some patients experiencing acute liver failure.1 Also, CA counteracts the effe...
متن کاملA comparison of dynamic cerebral autoregulation across changes in cerebral blood flow velocity for 200 s
OBJECTIVES The dynamic interaction between blood pressure (BP) and cerebral blood flow velocity (CBFV) is not fully understood, especially for CBFV changes lasting longer than 50 s. The interaction between BP and CBFV is relatively well characterized for periods <50 s using transfer function (TF) estimations of phase, gain, and coherence. We used TF estimations to compare the phase and gain for...
متن کاملDynamic cerebral autoregulation during brain activation paradigms.
Dynamic cerebral autoregulation (CA) describes the transient response of cerebral blood flow (CBF) to rapid changes in arterial blood pressure (ABP). We tested the hypothesis that the efficiency of dynamic CA is increased by brain activation paradigms designed to induce hemispheric lateralization. CBF velocity [CBFV; bilateral, middle cerebral artery (MCA)], ABP, ECG, and end-tidal Pco(2) were ...
متن کاملDynamic cerebral autoregulation is unaffected by aging.
BACKGROUND AND PURPOSE Normal aging is associated with marked changes in the cardiovascular and cerebrovascular systems. Although cerebral autoregulation (CA) is impaired in certain disease states, the effect of age per se on dynamic CA in humans is unknown and the focus of this study. METHODS Twenty-seven young subjects (/=55 years), matched for sex and s...
متن کاملDynamic cerebral autoregulation in acute intracerebral hemorrhage.
BACKGROUND AND PURPOSE Cerebral autoregulation (CA) is not universally impaired in acute intracerebral hemorrhage (ICH); however, the dynamic components of CA are probably more vulnerable. This study, therefore, evaluates the time course of dynamic CA in acute ICH and its relationship to clinical outcome. METHODS Twenty-six patients with ICH were studied on days 1, 3, and 5 after ictus. Dynam...
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ژورنال
عنوان ژورنال: Frontiers in Neurology
سال: 2021
ISSN: 1664-2295
DOI: 10.3389/fneur.2021.653167