By making safe the act and decreasing the restenosis risk, the stent had contributed to the development of coronary artery angioplasty which fill nowadays the whole of clinical and coronarographical field of coronary artery disease. The new stent, coated with substances amenable to minimise the best the restenosis risk, holds the hope of the interventional cardiology. The first results are promising. If the coated stent is effectively efficient in preventing restenosis, it has to prove his efficacy on the strong criterion of mortality and myocardial infarct recurences.