Abstract
Multiple acute ischemic lesions in different hemispheres or vascular territories are mainly considered to be of proximal embolic origin. However, despite careful diagnostic work-up, the etiological classification often stays undetermined. We propose that multiple acute ischemic lesions can sometimes be a phenomenon observed in small vessel disease (SVD). From a prospectively collected database of more than 7,000 stroke patients, 173 patients with acute bihemispheric infarction were identified. We analyzed those subjects with multiple small (< 15 mm Ø) subcortical acute ischemic lesions on diffusion-weighted MRI (DWI) and concomitant severe small vessel disease (Fazekas grades II-III) without a proximal embolic source as evaluated by cardiological investigations. Twenty patients (mean age 66 ± 12 years, 12 men) with a mean number of 2.95 ± 1.24 acute lesions on DWI (range of 2-7 lesions per patient) were identified (n = 5 Fazekas II°, n = 15 Fazekas III°). Most of the lesions were located in typical areas of lacunar infarction. The mean NIHSS score on admission was 2.95 ± 2.0 (range 0-8). Multiple acute ischemic lesions in different vascular territories might not always be of proximal cardiovascular embolic origin. Simultaneous ...Continue Reading
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