![]() Systolic (top number), measures the pressure in the arteries when the heart beats, and Diastolic (bottom number) measures the pressure in the arteries between heartbeats. It is typically recorded as the ratio of two numbers, the systolic pressure over diastolic pressure, like 120/80 (in mmHg). It is measured on the inside of an elbow at the brachial artery, which is the upper arm’s major blood vessel that carries blood away from the heart. ![]() Usually, doctors or nurses are measuring blood pressure at a person’s upper arm. And also it is influenced by some factors, for example earth gravity, valves in veins, and pumping from contraction of skeletal muscles, which make the value is not the same in various place inside the body. Blood pressure drops most rapidly along the small arteries and arterioles, and continues to decrease as the blood moves through the capillaries and back to the heart through veins. It decreases as the circulating blood moves away from the heart through arteries. During each heartbeat, it varies between a maximum (systolic) and a minimum (diastolic) pressure. ![]() Blood pressure is usually refers to the arterial pressure of the heart systemic circulation. ![]()
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