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What is the mean arterial pressure? The mean arterial pressure (MAP) is defined as an approximation of a time-weighted average of blood pressure values in large system arteries during the cardiac cycle. It is directly related to the cardiac output. To calculate the MAP, you need two values - you systolic and diastolic blood pressure.
Because of the nonlinear elastic properties of the arterial system, a higher mean arterial pressure is normally associated with a wider pulse pressure than is a lower mean pressure.12 Thus, a pulse pressure as narrow as 30 mm Hg is encountered commonly with a BP of 90/60 but not 140/110 mm Hg.