10 March 2021 : Clinical Research
High-Resolution Magnetic Resonance Imaging (HR-MRI) Imaging Characteristics of Vertebral Artery Dissection with Negative MR Routine Scan and Hypoperfusion in Arterial Spin Labeling
Yonggang Zhang1BCDEG, Chongchang Miao1CDEG, Yan Gu1ACDF*, Shunbin Jiang1BD, Jian Xu1ABCDOI: 10.12659/MSM.929445
Med Sci Monit 2021; 27:e929445
Table 2 Comparison of HR-MR characteristics of the 2 groups with VAD.
| Characteristics | Hypoperfusion group (n=9) | Normal group (n=17) | Total (n=26) | P value |
|---|---|---|---|---|
| Dissected side, n (%) | 0.586 | |||
| Intracranial | 3 (33.3) | 9 (52.9) | 12 (46.2) | |
| Extracranial | 5 (55.6) | 6 (35.3) | 11 (42.3) | |
| Intracranial and extracranial | 1 (11.1) | 2 (11.8) | 3 (11.5) | |
| Vertebrobasilar artery minimum angle (°), mean±SD | 86±10 | 132±28 | 115±33 | <0.001 |
| Vertebrobasilar artery minimum angle <90°, n (%) | 8 (88.9) | 3 (17.6) | 11 (42.3) | 0.001 |
| Basilar artery bending angle (°), mean±SD | 131±23 | 135±29 | 133±27 | 0.061 |
| Basilar artery bending angle <90°, n (%) | 3 (33.3) | 1 (5.9) | 4 (15.4) | 0.192 |
| Intra-vertebral artery hematoma side, n (%) | 0.755 | |||
| Outside | 2 (22.2) | 6 (35.3) | 8 (30.8) | |
| Inside | 4 (44.4) | 7 (41.2) | 11 (42.3) | |
| Both (spiral) | 3 (33.3) | 4 (23.5) | 7 (26.9) | |
| Effective lumen index, mean±SD | 0.19±0.07 | 0.31±0.06 | 0.27±0.09 | <0.001 |
| Lumen morphology, n (%) | 0.937 | |||
| Stenosis | 3 (33.3) | 10 (58.8) | 13 (50.0) | |
| Stenosis with dilation | 5 (55.6) | 5 (29.4) | 10 (38.5) | |
| Dilation | 1 (11.1) | 2 (11.8) | 3 (11.5) | |
| Enhancement type, n (%) | 0.258 | |||
| No enhancement | 1 (11.1) | 0 (0) | 1 (3.8) | |
| Punctate enhancement | 5 (55.6) | 13 (76.5) | 18 (69.2) | |
| Diffuse enhancement | 3 (33.3) | 4 (23.5) | 7 (26.9) |