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Aims: To compare the extent of cerebral ischemic injury after transcatheter aortic valve replacement (TAVR) with the use of an Embrella Embolic Deflector System versus unprotected TAVR. Methods: Fifteen patients with severe symptomatic aortic stenosis underwent TAVR with use of the Embrella Embolic Deflector System for cerebral protection. Cerebral diffusion-weighted magnetic resonance imaging (DWI) was performed in all patients at day 4 after the procedure and images were retrospectively compared to 37 patients who had previously undergone TAVR without a protection device (TAVR-only group). Results: Successful placement of the Embrella device was achieved in all patients. DWI revealed an increase in the number of ischemic lesions in the Embrella group compared with the TAVR-only group (9.0 vs 5.0, P = .044). The use of the Embrella device was however associated with a significant reduction in singlelesion volume: 9.7 mu L [5.8, 18.4] versus 17.8 mu L [9.5, 38.7] (P <.001). Moreover, total infarct volumes of more than 1000 mu L were only seen in the TAVR-only group. More lesions occurred in the right side of the brain in the Embrella group, whereas in the TAVR-only group lesions were distributed equally between left and right. One patient in the TAVR-only group suffered from a transient ischemic attack. Postoperative evaluation was clinically uneventful in the Embrella group. Conclusions: The use of the Embrella device during TAVR increased the number of cerebral ischemic lesions on postprocedural brain imaging. This increase in number was however accompanied by a significant reduction in single-lesion volume and the absence of large total infarct volume

Embrella embolic deflection device for cerebral protection during transcatheter aortic valve replacement