aorto-ostial lesion
A coronary stenosis located at the junction of a coronary artery with the aorta, requiring specialized intervention techniques due to unique anatomical challenges.
Full Definition
Aorto-ostial lesions occur at the junction between the coronary artery ostium and the aortic wall, representing a challenging subset of coronary disease due to their location and characteristics. These lesions often contain fibrous and calcific tissue extending from the aortic wall and are prone to elastic recoil after balloon angioplasty. Intervention typically requires precise stent positioning with the proximal edge exactly at the ostium to avoid geographic miss while preventing stent protrusion into the aorta. The procedure often necessitates aggressive lesion preparation, high-pressure stent deployment, and may benefit from intravascular imaging guidance. Aorto-ostial lesions have higher rates of restenosis and may require larger profile equipment due to calcification and fibrosis.
Usage
Usage note: Distinguish from branch ostial lesions. Specify which coronary ostium is involved (LM, RCA).
In Context
- "The aorto-ostial RCA lesion required careful stent positioning with the proximal edge flush with the aortic wall." — Complex intervention report
- "IVUS guidance was utilized for optimal treatment of the heavily calcified aorto-ostial LAD stenosis." — Procedural planning documentation