You certainly no stranger to the term for blood pressure, blood pressure, but there are several? It is in the end is how is it? Blood pressure have any effect on our life and health? Which will bring harm sustained increases in blood pressure? These problems Perhaps many people do not quite understand. Blood pressure (blood pressure, BP) refers to the side of the pressure of blood flow in the artery wall to process produced. Although blood pressure is called "pressure", but in fact it is "pressure", which means the artery wall unit area suffered pressure. That is, when we measured blood pressure, we measured blood pressure data is placed at the extremity arterial blood pressure. Then inferred that the overall blood pressure of those tested.
As early as 1733, English clergyman Stephen Hales was the first observational study of blood pressure, he first put a copper tube connected to a glass tube perpendicular to the ground, and then insert the brass horse artery by observing the inside of the glass tube Xuezhu highly preliminary determination horse blood pressure. 1854 Vierordt designed the first arterial blood pressure, in 1896 Italy Rive doctor will first cuff mercury sphygmomanometer for clinical, 1905 Russia Korotkoff doctor recommended to measure blood pressure with a stethoscope. Since then, doctors through years of intensive research on the formation of blood pressure, and other factors have a range of related issues more profound and comprehensive understanding of the theories of modern medicine become recognized around the diagnosis of disorders related to blood pressure, treatment and prevention in accordance with.
Blood pressure is an important basis for the formation of life and even life-sustaining, is our vital signs. No blood pressure, blood will not flow forward, various organs of the body will not get the blood supply. Then the blood pressure is how did this happen? First, there must be a complete, closed pipe, the pipe as well as the continuous flow of blood, which is our blood circulation system. In this system, the cardiac cycle to work, when the systolic blood continuously transported into the arteries when the heart diastolic venous blood back to the heart is an endless stream, so that the formation of blood circulation, thus beating heart blood pressure power source. Blood flow in the forward will certainly be met with resistance, the resistance mainly from the vessel wall, power and resistance in interaction to form our blood pressure. In most cases the softer the vessel, the greater the elasticity, the smaller the resistance, whereas the more rigid blood vessels, the greater the resistance. This is why atherosclerosis person's blood pressure is usually higher reason.
Systolic blood pressure is called systolic blood pressure measured, also known as "high" blood pressure is called the diastolic pressure when the diastolic, commonly known as "Low." Blood pressure expressed in units of kilopascals (kPa) or millimeters of mercury (mmHg), which is converted to 1 kPa equal to 7.5 mm Hg, 1 mm Hg is equal to 0.133 kPa. According to "the unit of measurement of blood pressure using a predetermined supplementary notice" of Quality and Technical Supervision and the Ministry of Health jointly promulgated by the current use of millimeters of mercury (mmHg) as the unit of measurement of blood pressure.
In medicine, blood pressure can be divided into data along with blood pressure and ambulatory blood pressure two, the former is also known as instant blood pressure, which is obtained at any time to measure blood pressure, so blood pressure in most cases we are talking about is with blood pressure. Sometimes blood pressure is measured only once can not represent the actual situation of the measured blood pressure. The latter is only in recent years is widely used in clinical blood pressure monitoring means, which represents a period of time (usually 24 hours) the patient's blood pressure, it can be relatively accurately reflect the changes in the measured blood pressure fluctuations and those within a certain time.
(Author: Geng Feng, deputy director of Physicians)
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