blood pressure
noun
°The pressure exerted by the blood against the walls of the arteries and veins; it varies during the heartbeat cycle, and according to a person's age, health and physical condition.
"the great majority of people who have serious conditions from high blood pressure suffer debilitating illness"
°The measurement of a person's blood pressure, expressed as systolic blood pressure and diastolic blood pressure readings.
"The nurse spent all day taking blood pressures at the hospital."