Figure 3. Kaplan-Meier curves for the cumulative probabilities of recurrent ischemic stroke in the territory (SIT) of the stenotic artery within 1 year after ictus, according to the velocity ratio (≥ or < median) as evaluated on the computational fluid dynamics models.

Intracranial atherosclerotic lesions with a velocity ratio of ≥ median may relate to a higher risk of SIT, compared with lesions with a velocity ratio of < median (HR 5.483; 95% CI, 1.105–27.211; log-rank P = 0.079).