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Table 4: 
Cerebral hemodynamic differences among patients with syncope of different type
Hemodynamic DifferencesNot Related to Asystole/Hypotension (n = 10)Cardioinhibitory/Vasodepressor/Mixed (n = 56)P
Contralateral ICA stenosis ≥70%7 (70%)22 (40%).2
Abnormal cerebral vasoreactivity6 (60%)9 (16%).04
Nonfunctioning AcomA6 (60%)17 (30.4%).07
Nonfunctioning PcomA7 (77.8%)31 (58.5%).23
Nonfunctioning AcomA plus nonfunctioning PcomA5 (50%)10 (18.5%).03
  • Note:—AcomA indicates anterior communicating artery; PcomA, posterior communicating artery; ICA, internal carotid artery.