The symptoms of ventricular fibrillation express themselves in the triad of the sudden onset of symptoms leading to death after a few seconds, with persistence of the respiration. The causes of ventricular fibrillation are: electric currents, fear, coronary spasm, sudden increase of blood-pressure in bath, chloroform, digitalis, strophantin, adrenalin, morphine, caffeine, ether, air-embolism, embolism, thrombosis of coronary arteries, infectious-toxic damage of myocardium by diphtheria, typhoid fever, scarlet fever, rheumatic fever, syphilis, Chagas' disease, and angina pectoris. In all cases of cardiac damage following any of these causes, it is important to use cardiazol, quinidin intravenously, heart massage, and artificial respiration.