doorstep lesion
Stenotic lesion located immediately at the ostium or origin of a vessel, requiring specialized treatment approaches.
Full Definition
A doorstep lesion refers to a stenotic or occlusive lesion located at the very ostium or origin of a vessel, particularly common in coronary arteries arising from the aorta or in branch vessels. These lesions present unique technical challenges because they involve the vessel's takeoff point, making standard angioplasty techniques potentially problematic due to risk of plaque shift into the parent vessel. Treatment often requires careful consideration of stent placement strategy, with potential need for precise ostial stent positioning or specialized techniques like crush stenting in bifurcation scenarios.
Usage
Usage note: Hyphenate as doorstep-lesion when used as compound modifier; distinguish from true ostial lesions.
In Context
- "The RCA exhibited a tight doorstep lesion requiring precise ostial stent placement." — Procedural report
- "Doorstep lesions carry higher risk of plaque shift during balloon inflation." — Educational material