2.3.7 – Quiz: Carotid Stenosis Grading Haemodynamic Method

The continuity law states:

At the site of a >50% stenosis there are typically the following colour flow Doppler characteristics:

In presence of a stenosis of 50-69% the PSV is:

Velocity within a stenosis typically:

In presence of a stenosis > 70% the PSV is:

The peak systolic velocity ratio (PSVR) is a ratio derived from:

In presence of a stenosis > 90% but less than near occlusion the PSV is:

A stenosis graded 60-69% should have:

The percentage of stenosis (diameter reduction) within a haemodynamically significant ICA stenosis is calculated using:

The St Mary’s ratio is derived from:

A stenosis graded 70-79% should have:

A stenosis graded 50-59% should have: