Cardiovascular disease risk and cerebral blood flow velocity

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Title: Cardiovascular disease risk and cerebral blood flow velocity
Author(s): Pase, Matthew P.; Grima, Natalie A.; Stough, Con K.; Scholey, Andrew; Pipingas, Andrew
Abstract: Background and Purpose: Cardiovascular disease risk predicts cognitive decline although the mechanisms underpinning this association remain unclear. Increasing cardiovascular risk may impair cerebral blood flow predisposing to cerebrovascular damage, cognitive decline, and dementia. Methods: This study examined the association between the Framingham General Cardiovascular Risk Profile and cerebral blood flow velocity in 160 healthy middle-aged adults. Blood flow velocity was assessed in both the common carotid and middle cerebral arteries using Doppler. Results: In adjusted linear regression models, cardiovascular risk predicted higher pulsatile (common carotid artery β=0.56, ΔR2=0.19, P<0.001; middle cerebral artery β=0.40, ΔR2=0.09, P<0.001) and lower mean flow velocity (common carotid artery β=−0.49, ΔR2=0.14, P<0.001; middle cerebral artery β=−0.27, ΔR2=0.04, P<0.05). Cardiovascular risk predicted common carotid artery mean and pulsatile flow over and above the effects of age (ΔR2=0.11–0.19, P<0.001) and sex (ΔR2=0.03–0.03, P<0.05). In contrast, cardiovascular risk remained a significant predictor of middle cerebral artery pulsatile, but not mean flow velocity, when controlling for age (ΔR2 0.05, P<0.05) and sex (ΔR2=0.06, P<0.01). Conclusion: Cardiovascular risk has divergent effects on mean and pulsatile blood flow velocity, each of which may independently contribute to cerebral pathology and cognitive impairment.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Life and Social Sciences. Centre for Human Psychopharmacology
Source: Stroke, Vol. 43, no. 10 (Oct 2012), pp. 2803-2805
Publication year: 2012
FOR Code(s): 1102 Cardiovascular Medicine and Haematology; 1103 Clinical Sciences; 1109 Neurosciences
Keyword(s): Blood flow; Brain; Cardiovascular disease; Cardiovascular risk; Cerebral arteries; Cognition; Hypertension
Publisher: Lippincott Williams & Wilkins
ISSN: 0039-2499
Publisher URL: http://dx.doi.org/10.1161/strokeaha.112.666727
Peer reviewed