Vertebral artery hypoplasia and vertebral artery dissection: A hospital-based cohort study

Objective:

To test the hypotheses that vertebral artery hypoplasia (VAH) is associated with an increased risk of ipsilateral spontaneous vertebral artery dissection (sVAD) and that hypoplastic vertebral arteries (VAs) are more prone than dominant VAs to dissection.

Methods:

In this case-control study, the population comprised 112 patients with sVAD and 224 age- and sex-matched controls treated at a high-volume center between...