The value of blood pressure Buy Capoten
Blood pressure - Blood is the hydrodynamic pressure in the vessels, which is caused by the heart, forcing blood into the vasculature and vascular resistance purchase captopril online.
The magnitude of blood pressure in the arteries, veins and capillaries is different and is one of the indicators of the functional state of the organism. Blood pressure undergoes rhythmic fluctuations, growing at reducing heart (systole) and decreasing during the period of relaxation (diastole). Every new piece of blood ejected heart stretches the elastic wall of the aorta and central arteries. During cardiac pause stretched artery walls fallen down and push blood through the arterioles, capillaries and veins.
In humans and in many mammals maximum (systolic), the pressure is about 120 mm Hg, and the minimum (diastolic) - about 70 mm Hg. Art. The difference between these two values (the amplitude of pressure changes at each contraction of the heart) is called pulse pressure. When physical and emotional stress occurs a transient increase in blood pressure, which is a physiological adaptive response.
Blood pressure measurement can be made directly (bloody) process - an introduction to the vessel cannula connected to a manometer tube (the first time such a measurement carried out in 1733 the Englishman S. Gales), or indirectly (bloodless) method - with the help of a sphygmomanometer. In humans, blood pressure is usually measured on the arm, above the elbow; defined in this value corresponds to the blood pressure in the artery only, rather than all over the human body. However, figures obtained make it possible to judge the magnitude of the pressure from the examinee.
When the blood passes through the capillaries of blood pressure is reduced from about 40 mm Hg. Art. at the end of arterioles to 10 mm Hg. Art. transition from the capillaries into venules. This decrease in blood pressure caused by blood friction against the walls of small blood vessels; it supports the blood flow in them. The magnitude of capillary pressure depends on the arteriolar and venous tone and pressure largely determines the conditions of the metabolism between blood and tissues. In the veins there is a further drop in blood pressure, which is at the mouth of the hollow veins becomes lower than atmospheric, due to the suction effect of the negative pressure in the chest.
Venous pressure is measured directly, by introducing a needle into a vein, connected to a manometer. The level of and fluctuations in blood pressure affect the baroreceptors of the vascular system; so there are nervous and humoral responses aimed at maintaining pressure on the characteristic of the body to the level of self-regulation and circulation.
The patients sluggish, apathetic, overcomes their extreme weakness and fatigue in the morning, do not feel the vitality even after a long sleep; deteriorating memory, a person is distracted, his attention unstable, reduced working capacity, constantly feeling short of breath, impaired potency and libido in men and menstrual cycle in women.
Mostly emotional instability, irritability, increased sensitivity to bright light, loud speech. Habitual headache often associated with fluctuations in the atmospheric pressure, a heavy meal, the long stay in the upright position. Leaking the type of migraine with nausea and vomiting, decreased after a walk in the fresh air or exercise, rubbing vinegar temporal areas, applying ice or cold towel on his head. There are dizziness, staggering when walking, fainting. BP usually slightly or moderately reduced to 90 / 60-50 mm Hg.