The device was not returned to edwards for evaluation as it was reported to have been discarded.The device history record (dhr) review could not be performed as the serial number is unknown.Attempts to retrieve additional information were unsuccessful.Bioprosthetic valves have been proven to have excellent long term durability.Replacement of a bioprosthetic valve over time is more likely due to structural valve deterioration (svd) which occurs as a result of stenosis (from calcification or host tissue overgrowth), dehiscence, fibrosis or non-calcific degeneration or endocarditis.These are typically due to patient factors such as age, gender, and prior medical history of hypertension, diabetes and renal disease.Based on the information received the cause of the event cannot be determined; however, patient factors may have contributed.If additional information is received a supplemental mdr will be submitted.Edwards will continue to review and monitor all events.Trends are monitored on a monthly basis and if action is required, appropriate investigation will be performed.
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