What is the normal value of human blood pressure

Nowadays, diseases such as hypertension have become a disease that people often hear about, especially in the elderly. The probability of occurrence is getting higher and higher. As children of the elderly, what you should know most is the normal value of human blood pressure, so as to help the elderly detect the level of blood pressure and take good care of them. So what should we do to be correct?

Blood pressure definition

Blood pressure refers to the lateral pressure of blood in blood vessels on the blood vessel wall per unit area, that is, pressure. Since blood vessels are divided into arteries, capillaries and veins, there are arterial blood pressure, capillary pressure and venous blood pressure. The blood pressure usually referred to is arterial blood pressure. When blood vessels dilate, blood pressure drops; when blood vessels constrict, blood pressure rises.

Systolic and diastolic blood pressure

Blood pressure is the pressure exerted on the blood vessel walls when blood flows in the blood vessels. It is the driving force that pushes blood to flow in the blood vessels. When the ventricles contract, blood flows from the ventricles into the arteries. At this time, the pressure of the blood on the arteries is the highest, which is called systolic pressure. The ventricles relax, the elasticity of the arteries shrinks, and the blood continues to flow forward slowly, but the blood pressure drops. The pressure at this time is called diastolic pressure. In other words, the blood pressure formed when the heart pumps blood is the systolic pressure, also called high pressure. Diastolic pressure, also called low pressure, is produced when blood flows back to the heart.

Daily fluctuations in blood pressure

The level of blood pressure is not only closely related to heart function, vascular resistance and blood volume, but also affected by nerves, body fluids and other factors. Blood pressure values ​​will vary with age, season, climate and occupation. Exercise, eating, mood changes, bowel movements, etc. will all lead to increased blood pressure, while rest and sleep will lower blood pressure.

In general, the daily blood pressure fluctuation of normal people is within the range of 2.7-4.0 kPa (20-30 mmHg). Without the influence of antihypertensive drugs, sleep can cause blood pressure to drop by about 20% (more obvious in women). The highest blood pressure point is generally between 9-10 a.m. and 4 p.m. to 8 p.m., and the lowest blood pressure point is between 1 a.m. and 3 a.m. At this time, the sleep phase often falls in the B and 1v phases. Elderly patients with hypertension spend longer time at the highest and lowest blood pressure points, forming a plateau.

Mental stimulation and emotional changes such as excitement and fear can often lead to a significant increase in systolic blood pressure. Exercise can also significantly increase systolic blood pressure, especially strenuous exercise, which often causes systolic blood pressure to rise to 24.0-26.7 kPa (180-200 mmHg). Blood pressure may drop after exercise stops. An increase in ambient temperature, such as taking a warm bath, can lower diastolic blood pressure, while a decrease in temperature, such as taking a cold bath in winter, can increase systolic blood pressure. People with high blood pressure should pay attention to their diet, as blood pressure increases as people age.

The following are the average normal blood pressure reference values ​​for Chinese people:

Age Systolic blood pressure (male) Diastolic blood pressure (male) Systolic blood pressure (female) Diastolic blood pressure (female)

16-20 115 73 110 70

21-25 115 73 110 71

26-30 115 75 112 73

31-35 117 76 114 74

36-40 120 80 116 77

41-45 124 81 122 78

46-50 128 82 128 79

51-55 134 84 134 80

56-60 137 84 139 82

61-65 148 86 145 83

As children, it is imperative that we have some basic knowledge about blood pressure, so that we can help our elderly to monitor their blood pressure every day and understand their physical condition at any time. The table above has detailed the normal value of human blood pressure. I believe you will understand it after comparing it.