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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.
Arterial blood pressure. - Arteries are elastic and muscular. Arteries dampen the high pressure pulses coming from the heart. The pressure in the arteries fluctuates with each beat, but the average pressure does not drop much because the diameter of arteries is so large they offer little resistance to flow.