Prevalence of various imaging findings in patients with SCADa
| Findings | No. (%) |
|---|---|
| FMD | 83/214 (38.8%) |
| Dissection and/or pseudoaneurysm | 28/214 (13.1%) |
| Aneurysm/ectasia | 22/214 (10.3%) |
| Carotid web | 10/214 (4.7%) |
| 1+ type of carotid tortuosity | 99/214 (46.3%) |
| Atherosclerosis | |
| None | 185/214 (86.4%) |
| Mild | 26/214 (12.2%) |
| Moderate | 3/214 (1.4%) |
| Severe | 0/214 (0.0%) |
| Vertebral tortuosity | |
| None | 124/214 (57.9%) |
| Mild | 64/214 (29.9%) |
| Moderate | 22/214 (10.3%) |
| Severe | 4/214 (1.9%) |
↵a FMD, dissection, pseudoaneurysm, and aneurysm/ectasia numbers reflect the number of patients with those findings in either the carotid or vertebral artery. Webs were only assessed in the carotid arteries because they are considered to be rarely present in the vertebral arteries. Subtypes of carotid tortuosity include kinks, loops, coils, and retropharyngeal and retrojugular courses. Carotid atherosclerosis and vertebral tortuosity reflect the more severe side, if asymmetry existed.