Table 3 Findings in cervical and cerebral arteries with focus on posterior circulation (n = 339)
From: Isolated transient vertigo: posterior circulation ischemia or benign origin?
Right | Left | |
|---|---|---|
Subclavian artery | ||
Stenosis, n (%) | 23 (6.8) | 37 (10.9) |
No stenosis, n (%) | 198 (58.4) | 184 (54.3) |
Not examined, n (%) | 118 (34.8) | 118 (34.8) |
Vertebral artery V0-V4 | ||
Stenosis ≥50%, n (%) | 76 (22.4) | 71 (20.9) |
Stenosis <50%, n (%) | 26 (7.7) | 15 (4.4) |
No stenosis, n (%) | 225 (66.4) | 241 (71.1) |
Not examined, n (%) | 12 (3.5) | 12 (3.5) |
Vertebral artery V0-V1 | ||
Stenosis ≥50%, n (%) | 41 (12.1) | 39 (11.5) |
Stenosis <50%, n (%) | 18 (5.3) | 7 (2.1) |
No stenosis, n (%) | 265 (78.2) | 281 (82.9) |
Not examined, n (%) | 15 (4.4) | 12 (3.5) |
Vertebral artery V2 | ||
Stenosis ≥50%, n (%) | 22 (6.5) | 24 (7.1) |
Stenosis <50%, n (%) | 3 (0.9) | 4 (1.2) |
No stenosis, n (%) | 302 (89.1) | 299 (88.2) |
Not examined, n (%) | 12 (3.5) | 12 (3.5) |
Vertebral artery V3-V4 | ||
Stenosis ≥50%, n (%) | 42 (12.4) | 37 (10.9) |
Stenosis <50%, n (%) | 9 (2.7) | 7 (2.1) |
No stenosis, n (%) | 274 (80.8) | 282 (83.2) |
Not examined, n (%) | 14 (4.1) | 13 (3.8) |
Basilar artery | ||
Stenosis ≥50%, n (%) | 27 (8.0) | |
Stenosis <50%, n (%) | 16 (4.7) | |
No stenosis, n (%) | 283 (83.5) | |
Other findings | ||
Basilar head aneurysm, n (%) | 2 (0.6) | |
Megadolichobasilaris, n (%) | 1 (0.3) | |
Not examined, n (%) | 13 (3.8) | |
Internal carotid | ||
Stenosis ≥70% (NASCET), n (%) | 32 (9.4) | 28 (8.3) |
Stenosis <70%, n (%) | 30 (8.8) | 50 (14.7) |
No stenosis, n (%) | 265 (78.2) | 248 (73.2) |
Other finding | ||
Pseudoaneurysm, n (%) | 0 (0.0) | 1 (0.3) |
Not examined, n (%) | 12 (3.5) | 13 (3.8) |
Intracranial arterya | ||
Stenosis ≥50%, n (%) | 4 (1.2) | |
No stenosis or <50%, n (%) | 324 (95.6) | |
Other findings | ||
Right PICA occlusion, n (%) | 1 (0.3) | |
Untreated right MCA aneurysm, n (%) | 1 (0.3) | |
Coiled AcomA aneurysm, n (%) | 1 (0.3) | |
Not examined, n (%) | 11 (3.2) | |
Any vertebral or basilar artery | ||
Stenosis ≥50%, n (%) | 119 (35.1) | |
No stenosis or <50%, n (%) | 209 (61.7) | |
Not examined, n (%) | 11 (3.2) | |
Bilateral vertebral or basilar artery | ||
Stenosis ≥50%, n (%) | 57 (16.8) | |
No stenosis or <50%, n (%) | 271 (79.9) | |
Not examined, n (%) | 11 (3.2) | |
Any pathologic finding (any degree)b | ||
Pathologic finding, n (%) | 205 (60.5) | |
Normal, n (%) | 123 (36.3) | |
Not examined, n (%) | 11 (3.2) | |
Any stenosis ≥ 50%b | ||
Stenosis ≥50%, n (%) | 191 (56.3) | |
No stenosis or <50%, n (%) | 137 (40.4) | |
Not examined, n (%) | 11 (3.2) | |