Question

What is Mean Arterial Pressure? How do you calculate it? Explain every aspect of your answer, including the variables in the equation.

Answer 1

MEAN ARTERIAL PRESSURE

Cardiac cycle consists of systole and diastole. The pressure in the arteries during the systole is the systolic blood pressure, whereas the pressure in the arteries during the diastole is the diastolic blood pressure.

The mean arterial pressure is defined as " the average arterial pressure during a cardiac cycle ". It indicates the degree of tissue perfusion to vital organs.  

Normal range of MAP = 70 - 110 mm Hg

The MAP should be maintained more than 70 mm Hg to ensure adequate cerebral perfusion.

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Also,

Where, Pulse pressure = Systolic pressure - Diastolic pressure

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For example,

The Systolic BP is 120 mm Hg and Diastolic BP is 80 mm Hg. What is the MAP ?

SBP = 120

DBP = 80

MAP = [1/3 x 120] + [2/3 x 80] = 96.3 mm Hg.