Rein, J.G.

patient autograft homograft aortic ross operation reoperation operation procedure valve technique regurgitation ross procedure study follow-up children value conduit diameter group thorac annulu reinforcement replacement sinotubular junction implantation heart result surgery junction sinus sinotubular dilatation population dimension increase failure model patient-year table germany registry gradient z values factor signi adult circulation aortic regurgitation endocarditi neoaortic center subcoronary grade development range hazard echocardiographic ann thorac surg analysis survival ross-operation swets subs service event autograft failure estimate 10 years re-operation re-intervention freedom root replacement technique reoperationen university aortic root follow-up time figure growth right donor z value aortic root dimensions