The division has four options : 1. stratification is blind bag above the diaphragm; 2. stratification is blind bag in the distal divisions ventral arteries; 3. fragmentation is not only distalno but the retrograno the arc and back of the arteries, extending blind sacks; 4. Even stratification are ventral portion adapted to the development of distal fenestration. According to the ISSH them. N. Bakulev frequency identifying type I stratification predator is 24%, type II-21%, type III-55% of all rasslaivath anevrizm breasts arteries. The autopsies showed a high prevalence rasslaivath anevrizm type II (80%), that is, a high fatality dogospitalina patients with anevrizm examination of these types. Etiology is generally believed that the main reason for breaking the wall of the arteries arterial hypertension, because 84% of patients had increased numbers blood pressure. However, arterial hypertension and gemodinamicakie characteristics of the various segments of arteries could lead to the division wall only when degenerative changes in the average envelope muscle pH and its structures. The latter may be due to various factors atheologicakimi : atherosclerosis, fibrosna dysplasia, idiopathic medionekrozom, genetic defect piece structures (Marfana disease), hormonal changes in the characteristic of the last trimester of pregnancy. In recent years, the development of angiography and methods bladder dilatation allocate another group rasslaivath anevrizm predator and its branches - anevrizma iatrogenic. AA Aorta has three most vulnerable segment-root, and the isthmus diaphragm. Gemodinamicescoe voltage of the zones and their chronic travmatization lead to degenerative changes in the average envelope arteries. Experiments confirmed as a stratification primitive : prolonged increase blood pressure always leads to a greater or lesser degree, dilatation arteries. It is also known that inner envelope in structure rastajima less than the average, and the outer shell, the greater elasticity. That is why when one of the regular "critical" increases blood pressure gap is the inner lining. Characteristics of the flow of blood in the bottom of the first and department descendants of the arteries, blood flow velocity and the nature of VLP-wave gemodinamicakie these parameters and determine the pattern in the development of the inner lining Even in those divisions. The hydraulic impact of the boundary rivers and the gap inner lining themselves can only lead to the development of vnutristenocna bruises. Further stratification occurs only when there is the pathological process in the middle clad rivers. In many processes aorte aetiological factors increase blood pressure and degenerative changes in the average envelope have different meanings. For example, stratification Even in pregnancy, disease Kushinga, feohromotsytome mainly due to "krizovmi" ups blood pressure. Stratification Even when koarktation, the same as in cattle, usually due to high blood pressure, and degenerative changes in the walls of arteries. Patients who are under 40 years of age stratification mammals most often due to congenital and genetic changes in the wall of arteries than human hemodynamics. Iatrogenic causes stratification lakes (with angiography, bladder dilatation, CS Even in the IC or a cardioplegicaki solution) depends solely on the technical errors and is not unconnected with the level of pressure, or degenerative changes in the walls of arteries. Pathology The study gistologicescom Even patients with arterial hypertension, there nadrav internal and secondary containment lakes. In chronic traumatization wall Even a distinct morphological changes similar medionekrozam Erdgeima. In idiopathic medionekrose described Erdgeimom, perceived usually over the age of 40 years, are hotbeds of necrosis in the muscle layer of secondary envelope fragmentation piece membranes and the characteristic kista-polosti filled jeleobrazna estate. Some people believe that this process is as a result of infection, intoxication, or even rheumatism. The disease Marfana the negative soedinitionotkannah, piece of the replacement of their mukoide substance. Gistological picture reminds pathological changes in idiopathic medionekrose.
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