Mean arterial pressure | |
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![]() Representation of the arterial pressure waveform over one cardiac cycle. The notch in the curve is associated with closing of the aortic valve. | |
MeSH | D062186 |
In medicine, the mean arterial pressure (MAP) is an average calculated blood pressure in an individual during a single cardiac cycle.[1] Although methods of estimating MAP vary, a common calculation is to take one-third of the pulse pressure (the difference between the systolic and diastolic pressures), and add that amount to the diastolic pressure.[2][3] A normal MAP is about 90 mmHg.[4]
Mean arterial pressure = diastolic blood pressure + (systolic blood pressure - diastolic blood pressure)/3
MAP is altered by cardiac output and systemic vascular resistance.[5] It is used clinically to estimate the risk of cardiovascular diseases, where a MAP of 90 mmHg or less is low risk, and a MAP of greater than 96 mmHg represents "stage one hypertension" with increased risk.[3][4]
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