“… 6 AVr also is becoming more common for insufficient aortic valves. 7 , 8 , 9 , 10 , 11 , 12 When adequate native valve leaflets exist, the current success of AVr is excellent 13 ; however, in patients with defective leaflet tissue, prosthetic valve replacement still is required. Pericardial leaflet patches have been thoroughly tested, but have almost uniformly failed.…”