Welcome to the future of valvular heart disease . This is just the beginning.Expect more dramatic break through . (Already mitral valve prototype is in advanced stages of development .)
Currently we have two approved percutaneous aortic valves for use in isolated Aortic stenosis. The Edwards valve is popular in USA ( 2011 ) and Medtronic is used extensively in Europe (From 2007)
Though both valves appear suitable .There are major differences in the concept , design , and technique of implantation .
Reference
Major issues to be addressed. Late onset Para valvular leak :
Please remember, these valves are not sutured around the aortic annulus , which our surgeons do it meticulously . The force that keep the valve within the aortic root is nothing but the disease process itself . The stiffened, elastic aortic root .(Does it appear foolish to expect the diseased aorta to hold the valve in situ ? but that is the reality ! )
If the aortic root dilates for some reason which is very likely in atherosclerotic process the very foundation of valve is shaken and para valvular leak is certain.
Dr.S.Venkatesan MD 
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