Cerebrovascular reactivity
Age Related Changes in Cerebrovascular Reactivity and Its Relationship to Global Brain Structure
... The ability of the cerebral vasculature to adapt rapidly to changes in arterial blood pressure or metabolic demand is essential to maintain normal brain function. Cerebrovascular reactivity (CVR) to a ...
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Improved White Matter Cerebrovascular Reactivity after Revascularization in Patients with Steno Occlusive Disease
... WM cerebrovascular reactivity was measured preoperatively and postoperatively using blood oxygen level– dependent (BOLD) MR imaging during iso-oxic hypercapnic changes in end-tidal carbon dioxide and was ...
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Quantification of Cerebrovascular Reactivity by Blood Oxygen Level–Dependent MR Imaging and Correlation with Conventional Angiography in Patients with Moyamoya Disease
... Cerebrovascular Reactivity by BOLD MR imaging MR imaging was performed on a 3T Signa HD clinical MR imaging scanner (GE Medical Systems, Milwaukee, Wisconsin) equipped with 40 mT/m gradient coils and a ...
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Cerebrovascular Reactivity Mapping: An Evolving Standard for Clinical Functional Imaging
... breath-hold cerebrovascular reactivity mapping, both in terms of acquisition and analysis, and reviews applications of this method to presurgical mapping, particularly with respect to blood oxygen level– ...
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Relationship of obesity and insulin resistance with the cerebrovascular reactivity: a case control study
... the cerebrovascular reactivity in associ- ation with cognitive performance and brain volumes in subjects with type 2 diabetes mellitus 56–80 years old at baseline and after four ...the ...
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Arterial Spin Labeling Evaluation of Cerebrovascular Reactivity to Acetazolamide in Healthy Subjects
... ASL imaging before and after ACZ injection was performed with different PLDs, and the effects of the PLD on rCBF and regional cerebrovascular reactivity (rCVR) were investigated. The PLDs studied were 1525 ...
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Cerebrovascular reactivity recovery following carotid angioplasty and stenting
... Carotid stenosis was detected by screening all stroke pa- tients with color-coded duplex ultrasound. Patients with > 70% symptomatic carotid stenosis were enrolled and then subdivided into two groups: 70–90% stenosis ...
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Transcranial doppler ultrasound to assess cerebrovascular reactivity: reliability, reproducibility and effect of posture
... Transcranial Doppler ultrasound (TCD) allows measurement of blood flow velocities in the intracranial vessels, and can be used to assess cerebral vasodilator responses to a hypercapnic stimulus. The reliability of this ...
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Quantitative Measurement of Cerebrovascular Reactivity by Blood Oxygen Level Dependent MR Imaging in Patients with Intracranial Stenosis: Preoperative Cerebrovascular Reactivity Predicts the Effect of Extracranial Intracranial Bypass Surgery
... impaired cerebrovascular reactivity, most commonly measured by single-photon emission tomog- raphy, xenon-enhanced CT, or transcranial Doppler sonogra- ...
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Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide
... METHODS: Cerebrovascular reactivity was the ratio of the blood oxygen level– dependent MR imaging response divided by the change in carbon dioxide ...standardized cerebrovascular reactivity ...
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Precision of Cerebrovascular Reactivity Assessment with Use of Different Quantification Methods for Hypercapnia Functional MR Imaging
... BACKGROUND AND PURPOSE: Tools for noninvasive mapping of hemodynamic function including cerebrovascular reactivity are emerging and may become clinically useful to predict tissue at hemo- dynamic risk. One ...
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Effects of sevoflurane versus propofol on cerebrovascular reactivity to carbon dioxide during laparoscopic surgery
... impaired cerebrovascular reserve capacity, such as cerebrovascular disease patients, inhaled anesthetic could be a priority strategy for anesthesia main- tenance to improve the compensatory vasodilation ...
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Impaired Cerebrovascular Reactivity Predicts Recurrent Symptoms in Patients with Carotid Artery Occlusion: A Hypercapnia BOLD fMRI Study
... This finding compares well with those in recent larger studies showing about 6-fold higher risk of recurrent events in patients with hemodynamic impairment: The stroke rate per year in p[r] ...
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Impaired cerebrovascular reactivity in sepsis associated encephalopathy studied by acetazolamide test
... the cerebrovascular resistance of the corresponding arte- rial territory decreases, resulting in an increase of the cerebral blood flow velocity measured in the middle cere- bral ...the cerebrovascular ...
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Cerebrovascular Reactivity during Prolonged Breath Hold in Experienced Freedivers
... MATERIALS AND METHODS: Fifteen male freedivers age range, 20 – 64 years; cumulative previous prolonged breath-holds ⬎2 minutes and 30 seconds: 4 –79,200 underwent repetitive 3T pseudocon[r] ...
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Neurogliovascular dysfunction in a model of repeated traumatic brain injury
... depressed cerebrovascular reactivity has the potential to worsen functional ...that cerebrovascular reactivity impairment was due to the newly sprouted vessels seen on in vivo two-photon ...
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The Brain Thermal Response as a Potential Neuroimaging Biomarker of Cerebrovascular Impairment
... able imaging, allowing structural and functional characterization of the tissue state.8 Among MR imaging techniques, cerebrovascular reactivity CVR measured from blood oxygen level– depe[r] ...
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Cerebral Microvascular Injury in Traumatic Brain Injury
... 4: Cerebrovascular reactivity (CVR) histogram via MRI- BOLD with 5% CO2 hypercapnia challenge in moderate and severe traumatic brain injury patients (red) compared to age- matched healthy controls ...
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Associations between cerebral and systemic endothelial function in migraine patients: a post-hoc study
... of cerebrovascular reactivity (CVR) to L-arginine between the middle cerebral artery (MCA) and flow-mediated vasodilatation (FMD) of the right brachial artery and the posterior cerebral artery (PCA) and FMD ...
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Idiopathic basal ganglia calcification associated with cerebral micro-infarcts: a case report
... of cerebrovascular reactivity based on single-photon emission computed tomography (SPECT) with acetazolamide ...of cerebrovascular reactivity in the whole brain, despite the absence of ...
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