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Arterial (blood) pressure
Arterial (blood) pressure is the pressure put by blood upon vessels, in other words, exceeding of pressure in circulatory system over pressure atmospheric. Usually measure arterial pressure, but except it exists also venous, capillary and endocardiac.
One of the major indicators which characterizes activity of circulatory system just and is arterial pressure. The blood volume which is pumped over in unit by time heart and also resistance of a vascular bed determine blood pressure. As the movement of blood is provided at the expense of cardiac performance, maximal pressure will be observed at an exit from heart, namely about a left ventricle. In arteries pressure will be slightly lower, in capillaries is even lower, veins will possess the lowest blood pressure, the similar situation is observed also in the right auricle – on an entrance to heart.
Indicators of arterial pressure
The upper figure of arterial pressure represents the systolic pressure reflecting pressure in arteries in that timepoint when there is a compression of heart and pushing out of blood in an artery. This indicator reflects force of reduction of a cardiac muscle.
The lower figure – the diastolic pressure which reflects a state in arteries at relaxation of heart and resistance of peripheral vessels. As blood moves on a blood channel, its amplitude gradually dies away, capillary and venous pressure poorly depends on a heart cycle phase.
For the healthy person normal pressure is 120/80 which reflects a ratio systolic and diastolic pressure. Normal the raznitsamezhda these indicators is made by 30-40 mm of a mercury column.
Modern measuring instruments of arterial pressure will make all procedure of measurement of pressure for you. They will pump up air, will count all data and will show result.
Influence of factors
Arterial hypertension, or permanent increase of pressure, and also arterial hypotension – lowering, are symptoms of various diseases.
For each age more exact norms of pressure in addition can be defined:
- Systolic pressure is calculated proceeding their additions to an indicator 102 age of the person increased on 0,6.
- Diastolic pressure – addition to 63 age, increased on 0,4.
Thus, the person, the higher for him is more senior than norm of arterial pressure.
One of the most dangerous risk factors of emergence and development of cardiovascular diseases is the increased systolic pressure. With increase of pressure upon each 20/10 risk of diseases increases twice.