This femoral artery waveform indicates what with a PSV of 500 cm/sec?

A peak systolic velocity (PSV) of 500 cm/sec in the femoral artery is highly indicative of high-grade stenosis. In vascular ultrasound, the degree of stenosis can often be assessed through changes in blood flow velocity, with higher velocities suggesting narrowing of the vessel.

A normal arterial flow is typically characterized by lower PSV values and a clear, triphasic waveform, indicating healthy blood flow without any significant obstructions. Low-grade stenosis generally shows moderate increases in PSV but would typically not reach such elevated levels as 500 cm/sec. Vascular dissection could present with varying flow characteristics and is not specifically suggested by such high velocities alone.

Thus, when a PSV reaches 500 cm/sec, it is a strong sign that there is significant narrowing within the artery, leading to the conclusion of high-grade stenosis. This information helps in diagnosing the potential severity of arterial blockages and directing appropriate management strategies.