What is indicated when the ICA waveform shows a PSV of 272 cm/sec and EDV of 88 cm/sec?

The interpretation of the ICA (Internal Carotid Artery) waveform relies heavily on specific measurements of peak systolic velocity (PSV) and end-diastolic velocity (EDV). In the scenario where the PSV is 272 cm/sec and the EDV is 88 cm/sec, these values suggest significant stenosis within the artery.

A PSV greater than 230 cm/sec typically indicates severe stenosis, often defined as greater than 70%. However, the combination of both PSV and EDV needs to be considered in context. The EDV of 88 cm/sec further supports the indication of moderately severe stenosis ranging between 50-80%. This combination reflects a hemodynamic effect where increased blood flow velocities and pressures are evident due to the narrowing of the artery.

In vascular ultrasound interpretation, specific ranges are established to classify stenosis severity, and your present numbers indicate a significant pathology consistent with moderately severe stenosis. Therefore, this assessment aligns with the thresholds established in vascular diagnostics indicating that the correct classification is that of moderately severe stenosis between 50-80%.