It was reported that a female patient underwent an atrial fibrillation (afib) ablation procedure and developed thrombosis requiring no interventions.Additional information was received on 03/25/2020: physician's opinion regarding the cause of the adverse event is that it was due to the boston scientific tsx transseptal sheath (non-bwi product) and occurred before any radio frequency delivery was done.The suspected device is the boston scientific tsx transseptal sheath.(b)(4).This report reflects information received by fda in the form of a notification per 803.22 (b)(2).
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