How dangerous is an angioplasty with stent?

Not very: Ptca w stenting has come a long way in recent years with better equipment and easier to place devices (smaller caliber stents). Drug-eluting stents have reduced restenosis (renarrowing) rates, now occurring less than 5-10 % oprocedural success with better tools that we now have is very high (greater than 95%). Risks (mi, vessel closure, dissection, perforation) collectively are less than 1%.

Short or Long Term?: Is the bigger issue. With many technical equipment improvements since started in humans 1977, short-term technical success & complication rates have greatly improved. The larger issue is that angioplasty is only about symptoms, induces acute ischemic damage (often small; rarely fatal) & complicates the disease process. Thus focusing on changing disease drivers & longer term issues better & wiser.

<2% risk death : About 5% risk of heart attack. Safer through the wrist (radial) than the groin (femoral) for bleeding complications.