How to calculate mean arterial pressure

Nowadays, everyone pays great attention to their physical health. Many people will pay attention to their mean arterial pressure. Because if the mean arterial pressure of the human body is abnormal, it is very dangerous for some elderly people. In severe cases, it is easy to cause sudden death. Moreover, in patients with hypertension, the mean arterial pressure will also increase accordingly. How to calculate the mean arterial pressure to get accurate information? Let's take a look at it below.

First, how to calculate mean arterial pressure? Mean arterial pressure is the total average value of arterial blood pressure at each moment in a cardiac cycle. Because the diastole is longer than the systole in a cardiac cycle, that is, the blood pressure remains at a low level for a longer time in a cardiac cycle, the mean arterial pressure is not a simple average of the systolic and diastolic pressures, but is closer to the diastolic pressure. Its approximate calculation method is: Mean arterial pressure = diastolic pressure + pulse pressure/3 or systolic pressure + diastolic pressure x2/3. Mean arterial pressure is the average driving force that continuously pushes the blood forward in a cardiac cycle, so it can more accurately reflect the functional state of the heart and blood vessels. Its normal value is about 96 mmHg (millimeters of mercury).

Second, during the heartbeat, contraction and relaxation constitute a cardiac cycle, and the average value of arterial blood pressure in a cardiac cycle is called mean arterial pressure. Since the time of diastole is longer than the time of contraction, the mean arterial pressure is not the average of systolic and diastolic pressures, but is closer to diastolic pressure, which is generally approximately equal to diastolic pressure + 1/3 pulse pressure. Therefore, the calculation method of mean arterial pressure is: mean arterial pressure + diastolic pressure + 1/3 pulse pressure.

The normal value of mean arterial pressure in adults is 70-105 mmHg. When the mean arterial pressure varies within a certain range (generally considered to be 60-160 mmHg), cerebral blood flow remains stable; when the mean arterial pressure decreases beyond a certain range, cerebral blood flow will decrease. Therefore, if blood pressure drops too quickly or too low during antihypertensive treatment, it can easily induce cerebral infarction.