no-reflow phenomenon
Paradoxical lack of tissue perfusion despite successful restoration of vessel patency following revascularization procedures.
Full Definition
The no-reflow phenomenon describes the paradoxical situation where adequate epicardial vessel patency is achieved following revascularization, yet tissue-level perfusion remains impaired due to microvascular dysfunction. This condition results from capillary obstruction by microemboli, endothelial swelling, or vasoconstriction at the microcirculatory level. Originally described in coronary interventions, no-reflow can occur in any vascular bed and is associated with worse clinical outcomes despite technically successful procedures. Recognition and treatment of this phenomenon is crucial for optimizing patient outcomes following endovascular interventions.
In Context
- "Despite successful stent deployment, the patient experienced no-reflow phenomenon requiring vasodilator therapy." — Interventional cardiology procedure report
- "Post-procedural imaging revealed no-reflow phenomenon in the distal vascular bed." — Catheterization laboratory report