Jan 2012 I had my bicuspid valve replaced and a 5.3 aneurysm stented. Now almost 9 years have been feeling dull pain and pressure in the area of my stent. It has grown from 2.1 to 3.2 cm. No other symptoms just feels like pain and pressure. How long do these dacon grafts last? Had my last echo in May. Should I get a ct to see what is going on?