Hello and welcome to HCM.... congratulations for successful implantation of STENT. the longevity of the stent depends upon many things like: 1. stent made of (medicated or non-medicated) 2. pt is with other risk factors eg. Hypertension, diabetics, smoking, high cholesterol 3. regularity of medication 4. physical exercise 5. over all mental satisfactions etc... usually medicated it lasts longer if medication are regular, while non medicated also last longer if it matches / mix with coronary artery. (endothelialization), inthis cases stent patency rate is very high (more than a decade). so, dont worry, do regular exercise/walking, avoid smoking, oil/salt food, regular medication and BE HAPPY. wish ur stent be patent for forever.