George, R.V.

aortic autograft homograft patient valve group surgery autograft group homograft group 10 years replacement 13 years study number reoperation death aortic root surgery survival aortic valve replacement aortic valve disease ross operation follow-up freedom regurgitation heart procedure outcome endocarditi sinus yacoub diameter change disease ross procedure autograft sinus diameter www.thelancet.com vol 376 data gathering analysis population trial cardiovasc thorac echocardiogram data analysis operation report magdi yacoub institute score signi 2 years ratio adult support cardiol aortic regurgitation article 1 year www.thelancet.com month model randomised perioperative stenosi figure pressure gradient questionnaire dilatation homograft root replacement aortic valve reoperation mixed-e ffects models fi brous support tissue signi ficant change gathering study period failure function patient follow-up magdi