Acute heart failure
Cardiovascular Diseases / / May 05, 2016
The main function of the circulatory system is the delivery of organs and tissues of various substances necessary for the life of the organism.If the circulation unit does not provide adequate amounts of oxygen and energy substances, there is a lack of circulation.On the mechanism of development and clinical manifestations conventionally distinguish two forms of circulatory failure:
1) cardiac circulatory failure due to weakening of the heart as a pump;
2) vascular circulatory failure associated with impaired vascular tone and physico-mechanical properties of the walls.
ratio of cardiac and vascular components of the circulatory failure depends on the nature of the disease, and in each case is different.Therefore, we can talk about the predominantly cardiac or predominantly vascular insufficiency.Finally, there may be concomitant heart failure, which occurs in most cases.
Help resuscitation is required in the case of acute cardiovascular failure, which is often accompanied by any pathological condi
most common cause of acute cardiovascular insufficiency - a syndrome of low cardiac output.It is necessary to emphasize the surprise factor of this syndrome as the presence of chronic low emissions (eg, in patients with mitral stenosis, aortic defects, etc.) Signs of acute circulatory disorders are usually absent.Small release syndrome is caused by a sudden deterioration of myocardial contractility or decrease venous inflow.In turn, venous flow suffers due to a decrease in blood volume (eg, acute blood loss) or loss of vascular tone, such as anaphylactic shock.It may be a combination of these reasons.
There is another cause of cardiovascular disease - increase in stroke volume (the volume of systole).Increasing the stroke volume is the result of any origin hypervolemia.Most often this is due to excessive transfusion at a fast pace or blood substitutes.In addition, hypervolemia may occur in cardiac patients with disorders of salt or fluid intake, at untimely taking diuretics;gipervolemia physiological characteristic of certain periods of pregnancy in patients with mitral stenosis.However, in the overwhelming;most cases, acute cardiovascular shortages accuracy is the result of a small release syndrome.
10 May, 2016