A case of acute intrastent thrombosis accompanied by arterial thrombosis in the lower extremities after percutaneous coronary intervention

Acute coronary stent thrombosis is one of the most serious complications of percutaneous coronary intervention (PCI). The incidence rate of acute stent thrombosis ranges from 0.4% to 0.6% (1). This report describes a case of intrastent thrombosis within 24 hours after coronary artery stent placement, followed by arterial thrombosis in the lower extremity. A male patient, aged 54 years, was admitted to the hospital due to chest tightness and chest pain. The patient underwent coronary angiography and the results indicated right coronary artery (RCA) narrowing greater than 90% at the most severe location, 60% narrowing in the original stents, and 70% narrowing at the distal end. A stent was placed in the proximal segment of the RCA. However, retention of the contrast agent was observed in the stent of the proximal segment, and vascular wall dissection was considered. Another stent was implanted into the site of the vessel wall dissection, completely covering the dissection.