A person’s blood pressure is 120/80 mmHg. What is the approximate mean arterial pressure, using MAP = diastolic + ⅓(pulse pressure)?
Correct answer B. 93 mmHg
Explanation
Pulse pressure = 120 − 80 = 40 mmHg. MAP = 80 + 40/3 ≈ 80 + 13 = 93 mmHg. The simple average, 100 mmHg, overestimates because diastole lasts longer than systole.
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