stent thrombosis
Thrombotic occlusion within a previously implanted coronary stent leading to acute vessel closure.
Full Definition
Stent thrombosis is a serious complication characterized by complete thrombotic occlusion within a previously implanted coronary stent, typically presenting as ST-elevation myocardial infarction due to abrupt vessel closure. The condition is classified temporally as acute (<24 hours), subacute (1-30 days), late (30 days to 1 year), or very late (>1 year) stent thrombosis. Risk factors include premature discontinuation of dual antiplatelet therapy, under-expansion or malapposition of stents, delayed endothelialization, and patient-specific factors such as diabetes or acute coronary syndrome. Academic Research Consortium (ARC) criteria define definite, probable, and possible stent thrombosis based on clinical presentation and angiographic findings.
Usage
Usage note: Specify timing (acute, subacute, late, very late) and ARC classification when documenting
In Context
- "Angiography confirmed definite acute stent thrombosis requiring emergent thrombectomy." — Emergency procedure report
- "Very late stent thrombosis occurred 18 months after drug-eluting stent implantation." — Case report