Late coronary thrombosis in paclitaxel-eluting stents. Case reports

Drug-eluting stent (DES) implantation has reduced angiographic and clinical restenosis that actually develops in less than 10% of treated patients. DESs also tend to delay the endothelialisation process increasing the risk of stent thrombosis. Subacute stent thrombosis may complicate long-term success of coronary angioplasty; it is a sudden event and usually causes acute myocardial infarction or sudden cardiac death. Patients undergoing DES implantation should be treated with dual antiplatelet therapy for at least 3-6 months. We describe two cases presenting with ST-elevation acute myocardial infarction due to stent thrombosis that occurred late after deployment of a paclitaxel-eluting stent, after discontinuation of antiplatelet therapy. It is important, for clinical cardiologists and general practitioners, to know the potential risk of late thrombosis of DES patients and, consequently, the implications regarding management of antiplatelet therapy.