[Restenosis on coronary endoprosthesis: treatment by implantation of a new endoprosthesis. Apropos of a case].

A 60-year-old man was admitted to hospital with threatened anterior myocardial infarction due to double tight stenosis in the 1st and 2nd segments of the left anterior descending artery. This double stenosis was successfully treated, without any complications, by two Palmatz-Schatz 15.4 mm (PS 154 A) coronary stents. He was readmitted to hospital six months later for another episode of threatened anterior infarction, due to restenosis involving the 2 coronary stents. Balloon angioplasty of this restenosis was attempted, but the poor result led us to insert 2 contiguous articulated Palmatz-Schatz 154 mm stents (PS 154 A) inside the previous two stents. The result was excellent with no complications apart from distal dissection induced by the guide, requiring insertion of an AVE Stent, 8 mm long and 3 mm in diameter. An exercising myocardial scintigraphy performed one month after the procedure was normal. The patient is still asymptomatic with a follow-up of 6 months. The feasibility and low risk of complication of balloon angioplasty in the case of restenosis, after insertion of an intracoronary stent have been demonstrated by several studies. To our knowledge, no case of restenosis of an intracoronary stent, treated by insertion of a new stent, have been reported. We report a case of restenosis on two Palmatz-Schatz stents successfully treated by insertion of two contiguous PS 154 A stents.