FYI...I am a 41 year old heart attack survivor with an angioplasty in July 2009. After an angioplasty, if your husband is not on a regimen of blood thinners like Plavix, Aspirin or possibly even Coumadin, the body will attack the stent as something "foriegn" to it and start to form clotting. Eventually, the stent will clog up, just as the artery did that caused the heart attack in the first place.
I don't have the stats on this, but unfortunately, it is not a question of IF, but WHEN he will have his next heart attack. I believe my Doctor said that not taking blood thinners would cause another blockage within 1 year; I would assume smoking, plus any unaddressed cholesterol issues (MEDS) would accelerate the timeline. Interestingly, some people only need to be on blood thinners for the first year or so after a stent/angioplasty; the body eventually adjusts and actually will grow tissue around the stent to the point where the body no longer recognizes the stent as a foreign object.
If your husband is having issues with the medications, have him speak to his Doctor to make adjustments.
Smoking is obviously not good, but not taking the medications is truly the biggest concern. Bottom line...It is his heart and it is truly a matter of life or death.