[Ventricular tachyarrhythmias. Etiology, diagnosis and treatment, based upon a group of patients]

Sustained ventricular tachycardia and ventricular fibrillation are found to be the main causes of sudden cardiac death in out-of-hospital patients. Most of these patients do have serious organic heart disease, hence the arrhythmia must be regarded as a dangerous symptom. Of 44 consecutive patients referred for further investigation of either of these arrhythmias, organic heart disease was found in 43 (98%). Coronary heart disease and cardiomyopathy were the two most common illnesses found. Surgical treatment was efficient in cases of arrhythmias induced by myocardial ischaemia, and even patients with marked reduction in their left ventricular performance tolerated surgery well. As for the medically treated patients, the recurrence rate appeared to be lowest among those who received class-III-antiarrhythmic drugs.