Figure 13.

Hyper-perfusion brain pulses on both hemispheres. A patient with possible cerebral hyper-perfusion syndrome on day 12 following a Grade V sub-arachnoid haemorrhage. The blood pressure was 180/80 mmHg. The patient had a poor neurological outcome. The pulse shape is like that seen in a peripheral arterial pressure trace with vasoconstriction. These features include an anacrotic notch and an early reflected wave. It has clear and distinct pulse features consistent with increased blood volume in the pial venules. Red brain pulse is 940 nm and blue brain pulse 660 nm.