Blood Pressure Test Machine
The most common tool that people use to measure arterial blood pressure is a sphygmomanometer. This tool historically used the height of a column of mercury for reflecting the changing blood pressure. The millimetres of mercury (mmHg) generally report the blood pressure values. However, electronic and aneroid tools do not contain mercury.
Blood pressure varies between systolic and diastolic pressures for each heartbeat. Systolic pressure is the highest in the arteries. It occurs close to the end of the cardiac cycle when the ventricles contract. On the other flip, the Diastolic pressure is minimum pressure in the arteries. It occurs near the start of the cardiac cycle. At this moment, the ventricles get filled with blood. Here is an example of the regularly measured values for a resting, healthy adult human.
The example you can consider here is 120 mmHg systolic and 80 mmHg diastolic. It is written as 120/80 mmHg and spoken as “one-twenty over eighty”).
Systolic and diastolic arterial blood pressures don’t stay fixed. Instead, these go through natural variations from one heartbeat to another throughout the day. It happens in a circadian rhythm. These also change in response to nutritional factors, stress, diseases, drugs, exercise, and temporarily from standing up.
Sometimes the variations might be considerable. Hypertension means the arterial pressure is abnormally high. On the other flip, the hypotension means it is abnormally low. Blood pressure apart from body temperature, pulse rate, and respiratory rate, is one of the four crucial signs that medical professionals and healthcare providers monitor regularly.