flow-limiting stenosis
Arterial narrowing severe enough to cause hemodynamically significant reduction in blood flow, typically requiring intervention.
Full Definition
Flow-limiting stenosis refers to arterial narrowing that is severe enough to cause hemodynamically significant reduction in blood flow under physiological conditions. Unlike anatomical stenosis measurements, flow-limiting assessment considers the functional impact on tissue perfusion and may incorporate pressure gradients, flow reserve measurements, or stress testing. The threshold for flow limitation varies by arterial territory and clinical context, but generally corresponds to stenoses greater than 70% in most vascular beds. Identification of flow-limiting stenosis is crucial for determining the need for revascularization and predicting symptom relief following intervention.
Usage
Usage note: Always specify the criteria used to determine hemodynamic significance.
In Context
- "The 80% stenosis was confirmed to be flow-limiting based on pressure wire measurements." — Interventional cardiology procedure
- "Despite moderate anatomical narrowing, this lesion was not considered flow-limiting under current conditions." — Clinical decision-making note