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BOLD MRI and early impairment of cerebrovascular reserve after aneurysmal subarachnoid hemorrhage
Author(s) -
Costa Leodante,
Fierstra Jorn,
Fisher Joseph A.,
Mikulis David J.,
Han Jay S.,
Tymianski Michael
Publication year - 2014
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24474
Subject(s) - medicine , vasospasm , subarachnoid hemorrhage , radiology , magnetic resonance imaging , ischemia , population , cohort , neuroimaging , cardiology , environmental health , psychiatry
Currently no biological or radiological marker is available to identify patients at risk of delayed ischemic deficit (DIND) after aneurysmal subarachnoid hemorrhage (aSAH). We hypothesized whether MR‐based quantitative assessment of cerebrovascular reserve (CVR) would detect early radiological markers of vasospasm and DIND. This manuscript describes our initial experience with this population. Five patients with aSAH underwent blood‐oxygen level dependent‐MRI (BOLD‐MRI) with CO 2 challenge for assessment of whole brain CVR. Patients were examined as soon as possible after aneurysm treatment. We obtained good quality anatomical and functional images without complications. Initial anatomical cerebrovascular imaging showed no vasospasm in all patients. Two patients had abnormal CVR‐MRI tests and both developed DIND. Of the 3 others with normal CVR‐MRI, one developed posterior circulation DIND. One patient with a normal CVR‐MRI developed angiographic vasospasm but no DIND. Changes in CVR maps as early as 36 h after hemorrhage had good spatial correlation with delayed ischemia during short‐term follow‐up. Our series shows that MRI with CO 2 challenge is feasible in this difficult population. Further developments might allow BOLD‐MRI with CO 2 challenge to identify patients at risk and provide anatomical correlation with future DIND, opening a new venue for prophylactic treatments. Further study is warranted in a larger patient cohort. J. Magn. Reson. Imaging 2014;40:972–979 . © 2013 Wiley Periodicals, Inc .