Figure 4
From: Cerebrovascular mental stress reactivity is impaired in hypertension
Representative examples of carotid artery PW Doppler velocity responses to mental stress in a normal and a hypertensive subject. Carotid artery velocities increased after mental stress compared to baseline in the normal subject (top panels) and decreased in response to mental stress compared to baseline in the hypertensive subject (bottom panels). PSV, peak systolic velocity; EDV, end diastolic velocity; TAM, time averaged mean velocity; RI, resistive index; P, pulsatility index.