If systolic blood pressure is 120 and diastolic is 80, what is the approximate MAP?

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Multiple Choice

If systolic blood pressure is 120 and diastolic is 80, what is the approximate MAP?

Explanation:
Mean arterial pressure represents the average pressure in the arteries during one cardiac cycle and is a key measure of tissue perfusion. It is weighted toward diastole because the heart spends more time in relaxation than in contraction, so we don’t simply average systolic and diastolic pressures equally. A practical way to estimate it is to add about one third of the pulse pressure to the diastolic pressure. Pulse pressure is the difference between systolic and diastolic pressures. Here, pulse pressure is 120 − 80 = 40 mmHg. One third of that is roughly 13 mmHg, so MAP ≈ 80 + 13 ≈ 93 mmHg. Another common formula, which yields the same result, is (SBP + 2×DBP) / 3 = (120 + 160) / 3 ≈ 93 mmHg. So the approximate MAP is about 93 mmHg.

Mean arterial pressure represents the average pressure in the arteries during one cardiac cycle and is a key measure of tissue perfusion. It is weighted toward diastole because the heart spends more time in relaxation than in contraction, so we don’t simply average systolic and diastolic pressures equally.

A practical way to estimate it is to add about one third of the pulse pressure to the diastolic pressure. Pulse pressure is the difference between systolic and diastolic pressures. Here, pulse pressure is 120 − 80 = 40 mmHg. One third of that is roughly 13 mmHg, so MAP ≈ 80 + 13 ≈ 93 mmHg.

Another common formula, which yields the same result, is (SBP + 2×DBP) / 3 = (120 + 160) / 3 ≈ 93 mmHg.

So the approximate MAP is about 93 mmHg.

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