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Abstract #1341

Determinants of 7T MRI microvascular function and link with small vessel disease burden in an ageing population

Stanley Pham1, Madouc Linders1, Anna Streiber2, Nikki Dieleman3, Jaco Zwanenburg1, Julia Neitzel2,4, Arfan Ikram5, Meike Vernooij2,4, and Geert Jan Biessels3
1Center for Image Sciences, University Medical Center Utrecht, Utrecht, Netherlands, 2Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, Netherlands, 3Neurology, University Medical Center Utrecht, Utrecht, Netherlands, 4Epidemiology, Erasmus Medical Center, Rotterdam, Netherlands, 5Erasmus Medical Center, Rotterdam, Netherlands

Synopsis

Keywords: Blood Vessels, Blood vessels, Small vessel disease, white matter hyperintensities, 7T MRI, small vessel function, Rotterdam Study

Motivation: Novel 7T MR techniques allow non-invasive assessment of cerebral small vessel function, potentially relevant to small vessel disease (SVD), a common cause of stroke and dementia.

Goal(s): Assess determinants of small vessel function and its link to SVD lesion burden.

Approach: Perforating artery blood flow velocity and pulsatility were measured with 7T MRI in 200 participants >60 years from a population-based sample and linked to vascular risk factors and white matter hyperintensity (WMH) volume using linear regression.

Results: Age, blood pressure, and BMI were determinants of small vessel function. In turn, vessel function did not relate to WMH burden.

Impact: In the general aging population, perforating artery blood flow velocity and pulsatility do not relate to whole-brain SVD-lesion load. Other complementary small vessel function measures should be investigated as a potential early marker of SVD.

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