coronary aneurysm
Abnormal focal dilatation of coronary artery exceeding 1.5 times the adjacent normal vessel diameter.
Full Definition
Coronary aneurysm represents abnormal focal or diffuse dilatation of a coronary artery segment, defined as vessel diameter exceeding 1.5 times that of adjacent normal segments. These lesions may be congenital, acquired, or iatrogenic, with causes including atherosclerosis, Kawasaki disease, connective tissue disorders, or post-intervention complications. Giant aneurysms (>4 times normal diameter) carry higher risks of thrombosis, embolization, and rupture. Angiographic evaluation requires multiple projections to accurately assess aneurysm morphology, and management varies based on size, location, and underlying etiology. Some aneurysms may require intervention to prevent thrombotic complications, while others can be managed conservatively with antiplatelet therapy.
Usage
Usage note: Distinguish from pseudoaneurysm and specify size relative to normal vessel diameter.
In Context
- "Angiography revealed a large coronary aneurysm in the proximal RCA with associated thrombus formation." — Diagnostic catheterization report
- "The giant coronary aneurysm required covered stent placement to exclude the aneurysmal segment." — Interventional procedure report