Using a new plethysmographic technique to measure peripheral arterial tone (PAT), we report here that REM sleep in humans is associated with considerable peripheral vasoconstriction. The apparatus ...

The incidence of stroke is significantly increased in winter ... a process known as vasoconstriction. This can raise blood pressure, one of the most significant risk factors for stroke.

New risk score links stress response to heart disease, enhancing prediction and prevention in coronary artery disease patients.