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CAUSES OF SUDDEN CIRCULATORY ARREST
1. Hypoxia and hypercapnea, particularly if these factors are combined with elevated content of catecholamines. 2. Irritation of n. vagus and sudden coronary insufficiency owing to a sharp drop of A P. 3. Compression of great vessels and the heart itself, particularly a bend of vena cava superior and cardiac tamponade. 4. Myocardial infarction. 5. Air embolism and thromboembolism of pulmonary artery. 6. A sharp decrease of blood return to the heart (injury of great vessels, torsion of vessels during operation). 7. Contusions of the heart, electrical injury and lightning injury. 8. Sharp electrolyte disorders, K+ in particular. 9. Acute poisonings, including overdosage of medicaments or their improper application.
10. Massive blood loss. 11. Drowning. 12. Mechanical asphyxia (a lump of food, persistent laryngospasm). FORMS OF CIRCULATORY ARREST: — electromechanical dissociation or ineffective heart as a result of decrease of blood return to the heart in case of massive blood loss, dangerous arrhythmias such as Morgagni-Adams-Stokes syndrome, paroxysm of ciliary arrhythmia and so on; — ventricular fibrillation — it is a disorganized contraction of separate muscular fibers unable to press out the blood from cardiac cavities. Fibrillation is divided into microwave and macrowave fibrillation. In microwave fibrillation it is necessary to turn it into macrowave fibrillation (by means of adrenalin) and then to carry out defibrillation; — asvstolv. — there is an isoline on ECG. That is what corresponds, in Дата добавления: 2015-02-05 | Просмотры: 617 | Нарушение авторских прав |