It is sometimes difficult with a CT angio to see if a stent is blocked and likely the best option is a coronary angiogram.
I'm a 52 hear old man ,and i had a aortic valve replacement in 2005, in 2006 i had a pacemaker put in and in 2007 my aortic valve was leaking 100% and nother one put in and was a pig tissure aortic valve, and now july 2008 it leaking, Should i get a Mechanical aortic valve.