Cerebral hemodynamic differences among patients with syncope of different type
| Hemodynamic Differences | Not Related to Asystole/Hypotension (n = 10) | Cardioinhibitory/Vasodepressor/Mixed (n = 56) | P |
|---|---|---|---|
| Contralateral ICA stenosis ≥70% | 7 (70%) | 22 (40%) | .2 |
| Abnormal cerebral vasoreactivity | 6 (60%) | 9 (16%) | .04 |
| Nonfunctioning AcomA | 6 (60%) | 17 (30.4%) | .07 |
| Nonfunctioning PcomA | 7 (77.8%) | 31 (58.5%) | .23 |
| Nonfunctioning AcomA plus nonfunctioning PcomA | 5 (50%) | 10 (18.5%) | .03 |
Note:—AcomA indicates anterior communicating artery; PcomA, posterior communicating artery; ICA, internal carotid artery.