plaque shift
Displacement of atherosclerotic material from the treated vessel to an adjacent branch, potentially causing acute occlusion.
Full Definition
Plaque shift is a recognized complication of percutaneous coronary intervention where balloon inflation or stent deployment causes atherosclerotic plaque to be displaced from the target lesion into an adjacent side branch or bifurcation. This phenomenon can result in acute side branch occlusion, compromised flow, and potentially significant myocardial injury. Plaque shift is more commonly observed in bifurcation lesions, heavily calcified lesions, or vessels with significant plaque burden. Prevention strategies include careful lesion preparation, appropriate device sizing, and consideration of side branch protection techniques. Recognition of plaque shift requires immediate intervention, often involving side branch balloon angioplasty or stenting.
Usage
Usage note: Document the affected branch and corrective measures taken.
In Context
- "Significant plaque shift into the diagonal branch was observed following main vessel stent deployment." — Procedural complication report
- "The risk of plaque shift was discussed given the large plaque burden at the bifurcation site." — Pre-procedural planning note