Mean arterial pressure is the average arterial pressure during the cardiac cycle.
It is calculated as: MAP = cardiac output * total peripheral resistance.
During static and high-intensity exercise like weight lifting, a physical compression of blood vessels raises total peripheral resistance. The increase in total peripheral resistance will increase the blood pressure.
Dynamic and aerobic exercises will not significantly affect mean blood pressure (minor isolated systolic rise in blood pressure can be seen) because the decrease in total peripheral resistance (due to dilation of arterioles in exercising muscle) is accompanied by an equivalent increase in cardiac output.
Mean arterial pressure is not equal to mean systemic pressure.
MAP = 2/3rd diastolic pressure + 1/3rd systolic pressure. If an individual has blood pressure of 120/80 mmHg, MAP = 2/3rd (80) + 1/3rd (120) = 92 mmHg
MEAN SYSTEMIC PRESSURE
Mean systemic pressure is the average pressure that exists in the vascular system if the cardiac output stops and the pressure within the vascular system redistributes.
It is an indicator of how full the circulatory system is.
Value of mean systemic pressure is nearly equal to right atrial pressure - 3-8mmHg
Right atrial pressure is also called as central venous pressure.
Mean systemic pressure depends on the total compliance of the arterial, venous beds and the total blood volume within them.
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