ostial lesion
Pronunciation: OSH-tee-al LEE-zhun
Atherosclerotic narrowing located at the origin or mouth of a coronary artery or side branch.
Full Definition
A stenotic lesion positioned within 3mm of a vessel origin, including aorto-ostial lesions at main coronary artery origins and branch-ostial lesions at side branch takeoffs. These lesions present unique technical challenges due to elastic recoil, increased calcification, and difficulty achieving optimal stent positioning. Ostial lesions typically require specific interventional techniques such as aggressive predilation, high-pressure balloon inflation, or specialized stent placement strategies to achieve optimal results and prevent geographical miss.
Usage
Usage note: Specify location (aorto-ostial vs branch-ostial) when clinically relevant.
In Context
- "The ostial lesion in the left anterior descending artery required precise stent positioning to avoid geographical miss." — Procedure report
- "Aorto-ostial lesions typically demonstrate more elastic recoil than mid-vessel stenoses." — Educational material