[Late thrombosis of sirolimus-eluting stent occurring in the perioperative period].

We report a late thrombosis of sirolimus-eluting stent 6 months after implantation of a drug-eluting stent. A 70-year-old man (52 kg, 148 cm) was diagnosed as acute cauda equina syndrome, and spinal surgery was scheduled. One week before the operation, the patient's aspirin and clopidogrel regimen was replaced with heparin injection, which was then discontinued 8 hours before the operation. The operation was completed uneventfully. The patient complained of severe chest pain 1 hour after the end of operation. Coronary angiography demonstrated stent thrombosis. PCI (removal of the thrombosis and plain old balloon angioplasty) was performed, and incomplete stent apposition was diagnosed with coronary angiography.