الفهرس 
1. IntroductionOnly 14 pages are availabe for public view
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Abstract
The modified Bentall – De Bono procedure is considered the
standard approach for the repair of aortic root aneurysm, ascending aortic
aneurysm or a type A aortic dissection when accompanied by an
incompetent, irreparable aortic valve. However, the modified Bentall
procedure also exposes the patient to the problems associated with
artificial valves. Mechanical valves, while long lasting, require life-long
anticoagulation. Biological valves, while not requiring anticoagulation,
expose the patient to the potential need for reoperation in 10–15 years
which, in the case of a re-do modified Bentall, is a major and relatively
risky operation, the observation that in at least half of the patients the
native valve cusps are undamaged led to the development of valve
sparing aortic root reconstruction techniques.