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• W2988329295 abstract "Background Arterial stiffness in large arteries is a risk factor for cerebral small vessel disease and neurodegeneration. The challenge of accessing intracranial pulsatility noninvasively is one reason few studies provide empirical insight on the relationship between large artery and tissue pulsatility in the human brain. Purpose To investigate the association between the functional magnetic resonance imaging (fMRI)‐derived cardiac‐related pulsatility in the insular cortex and the ultrasound‐derived pulsatility index in the middle cerebral artery (MCA‐PI). Study Type Cross‐sectional. Population Younger adults (11; 25 ± 4 years) and older adults with and without cardiovascular risk factors (44; 70 ± 6 years). Field Strength/Sequence T 1 ‐weighted, fluid attenuated inversion recovery, and T 2 *‐weighted blood oxygenation level‐dependent (BOLD) sequences at 3T. Assessment MCA‐PI and cardiac‐related pulsatility were assessed at rest by transcranial Doppler ultrasound and BOLD fMRI, respectively. Statistical Tests Multivariate analyses of covariance between MCA‐PI and cardiac‐related pulsatility. Analysis of variance was used to assess regional differences. Results MCA‐PI was associated with cardiac‐related insular pulsatility ( P = 0.037), but not whole‐brain pulsatility ( P = 0.81). Left insular pulsatility was higher than right insular pulsatility ( P < 0.01) and was associated with diastolic blood pressure ( P = 0.028). Data Conclusion We show a correlation between ultrasound and fMRI measures of cerebrovascular pulsatility. This association provides insight into the transmission of pulsatile energy from large basal arteries at the Circle of Willis to downstream cerebrovascular beds and has implications for the utility of cardiac‐related pulsatility as a potential marker for cerebral small vessel disease. Level of Evidence : 4 Technical Efficacy : Stage 3 J. Magn. Reson. Imaging 2020;51:1454–1462." @default.
• W2988329295 created "2019-11-22" @default.
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• W2988329295 date "2019-10-30" @default.
• W2988329295 modified "2023-09-27" @default.
• W2988329295 title "Cardiac‐Related Pulsatility in the Insula Is Directly Associated With Middle Cerebral Artery Pulsatility Index" @default.
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• W2988329295 doi "https://doi.org/10.1002/jmri.26950" @default.
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