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As reported by a field clinical specialist (fcs), approximately 8 years post tavr a patient developed stenosis and required a valve in valve.A 29mm sapien 3 valve was implanted and tolerated the procedure without difficulties.The patient left the procedure area alert and with stable vitals.The physician felt the xt valve did not fail, just succumb to the disease process.
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The valve was not return to edwards lifesciences as it remains implanted in the patient.A review of the risk management documentation was performed, and the reported event is an anticipated risk of the transcatheter heart valve procedure, additional assessment of the failure mode is not required at this time.The complaint was unable to be confirmed.The reported event does not allege a malfunction that could be related to an edwards manufacturing deficiency.A review of ifu/training materials revealed no deficiencies.During the manufacturing process, all sapien xt valves are 100% visually inspected for defects and 100% tested for proper coaptation under physiological backpressure conditions prior to release for distribution.Therefore, it is highly unlikely that a manufacturing defect contributed to the event.As reported, ''approximately 8 years post tavr a patient developed stenosis and required a valve in valve.A 29mm sapien 3 valve was implanted and tolerated the procedure without difficulties.The patient left the procedure area alert and with stable vitals.The physician felt the xt valve did not fail, just succumb to the disease process''.Per the instruction for use (ifu), valve stenosis is a potential risk associated with bioprosthetic heart valves.Per the valve academic research consortium (varc), valve stenosis can result from several factors, including calcification, support structure deformation (out of round configuration), trauma (cardio-pulmonary resuscitation, blunt chest trauma), and native leaflet prolapse impeding prosthetic leaflet motion.Stenosis of an implanted valve may be a manifestation of structural valve deterioration (svd).This term refers to changes intrinsic to the valve, and can include failure modes such as wear, calcification, leaflet tear, stent creep, leaflet disruption, or leaflet retraction.Svd may be mild and not require any intervention or it may be moderate to severe.It causes the heart to work harder to eject blood from the ventricle.Depending on severity it could be an indication for valve replacement or medical intervention.Tissue calcification is a well recognized failure mode of bioprosthetic valves.The mechanisms for bioprosthetic heart valve tissue calcification are not fully understood.Many factors can contribute to the onset and propagation of calcification including patient related (e.G.Patient age, disease state, immune status, and other co-morbidities), pharmacological, and intrinsic properties of the valve itself.It is widely understood that patients with chronic renal disease and prior history of calcific stenosis of the native valve may be predisposed to bioprosthetic calcification.Due to limited information and unavailable of relevant imagery, a definitive root cause was unable to be determined at this time.Since no manufacturing non-conformances or labeling/ifu/training deficiencies were identified, no product non-conformance was confirmed, and the complaint occurrence rate did not exceed the applicable trending control limit, no corrective/preventative actions nor product risk assessment (pra) escalation are required.
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