Hemmer, W.

patient homograft aortic autograft value regurgitation ross operation diameter study technique annulu reoperation operation group sinotubular junction valve procedure ross procedure follow-up junction sinotubular dimension increase reinforcement thorac z values sinus signi neoaortic model children gradient dilatation grade implantation development echocardiographic replacement swets subs service heart center aortic regurgitation aortic root donor surgery signi ficantly aortic root dimensions z value autograft function homograft regurgitation germany failure result analysis measurement colleague ficant growth subcoronary al homograft performance neoaortic root dimensions table aortic annulus registry ficantly autograft failure university ar development donor age donor gender root group department circulation ar grade root replacement root inclusion technique presence population level subcoronary implantation technique