Cerebral Blood Flow, Heart Rate, and Blood Pressure Patterns during the Tilt Test in Common Orthostatic Syndromes

Figure 11

Cardioinhibitory syncope. In this subject, slowing of HR, BP drop, and cerebral vasodilation began almost simultaneously (marked by blue line) and progressed rapidly into asystole of 27 seconds. Note the vasodilatory pattern in CBFv early in the evolution of syncope (blue arrows) followed by reactive hyperemia (green circle) with elevated systolic and diastolic CBFv. Data from 39-year-old man.