Prevalence of FMD, dissection and/or pseudoaneurysm, aneurysm/ectasia, and webs based on arterial involvementa
| Right Carotid Artery | Left Carotid Artery | Both Carotid Arteries | Right Vertebral Artery | Left Vertebral Artery | Both Vertebral Arteries | |
|---|---|---|---|---|---|---|
| FMD | 56 (25.2%) | 49 (22.9%) | 39 (18.2%) | 30 (14.0%) | 32 (15.0%) | 22 (10.3%) |
| Dissection and/or pseudoaneurysm | 5 (2.3%) | 8 (3.7%) | 0 (0.0%) | 8 (3.7%) | 12 (5.6%) | 1 (0.5%) |
| Aneurysm/ectasia | 16 (7.5%) | 13 (6.1%) | 8 (3.7%) | 4 (1.9%) | 3 (1.4%) | 1 (0.5%) |
| Web | 6 (2.8%) | 6 (2.8%) | 0 (0.0%) | NA |
Note:—NA indicates not applicable.
↵a The presence or absence of webs within the vertebral arteries was not assessed because they are classically found in the carotid bulbs. Data are No. (%).