Udi (b)(4).The device was not returned to edwards for evaluation as it remains implanted.The device history record (dhr) was reviewed and shows that this device met all manufacturing specifications for product release prior to distribution.No issues were identified that would have impacted this event.Atrial fibrillation (af) is a common arrhythmia in patients undergoing cardiac surgery, including valve replacement.It is a common pre-existing condition, can be associated with the procedure, or can be a progression of the patient¿s disease at some point in the post-operative period.Although a well-recognized complication of heart surgery, it is typically not related to the device, but the procedure or underlying cardiac disease.It has been demonstrated that post-operative af tends to occur within 2 to 4 days after the procedure, with a peak incidence on postoperative day 2.70% of patients develop this arrhythmia before the end of post-operative day 4 and 94% before the end of post-operative day 6.Thus, events of atrial fibrillation occurring beyond the first postoperative week are much more likely to be due to the patient's underlying pathophysiology, rather than the implantation procedure.A manufacturing related issue was not identified.A definitive root cause could not be determined.If additional information is received a supplemental mdr will be submitted.Edwards lifesciences will continue to monitor all reported events.No further actions are required at this time.
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