In 1996 – 2004 145 patients with non-coronarogenic ventricular tachycardias were operated on at the Department of Surgical Treatment of Tachyarrhythmias. Reason for the development of malignant ventricular arrhythmias in 35 of those patients was history of myocarditis with consequent occurrence of fibrosis zones in right and left ventricular myocardium. Based on the analysis of clinical condition and examination results we have identified number of diagnostically significant criteria, which allowed differentiating inflammatory myocardial changes from other non-ischemic cardiac diseases. Successful elimination of arrhythmogenic zones in myocardial ventricles by radiofrequency catheter ablation and absence of postoperative complications allows us assuming that it is the preferred treatment strategy for patients with ventricular tachycardias attributable to cardiac sclerosis associated with myocarditis of non-rheumatic genesis.