Ventricular Tachycardia Ablation

In this study are presented, six patients with ventricular tachycardia (VT) of different etiologies in who have been radiofrequency (RF) ablation in the attempted was electrophysiology (EP) laboratory at the Türkiye Yüksek ihtisas Hospital, Ankara, Turkey. The m ean age of the patients w ere 35.5± 10.2 (22- 45) five of whom were male. Three of the six patients had normal echocardiographic and coronary angiographic findings. Two patients had idiopathic dilated cardiomyopathy and the remaining patient had sustained anterior myocardial infarction. Clinically, five patients had VTs of single morphology and one patient had unifornı frequent ventricular premature beats (VPB). Sustained VT in five patients and nonsustained VT in one patient was induced in the EP laboratory. The induced VTs were morphologically same with the elinical VTs or VPBs. The patients were hemodynamically stable during VT, which was a prerequisite for mapping and ablation. In three patients without structural heart disease, the idiopathic VTs were originating from the right ventricular outflow tract in two and from the left ventricle in the remaining one. In all three patients with structural heart disease the VTs were originating from the left ventricle. In idiopathic VTs of right ventricular origin, early endocardial activation and pace-mapping, in idiopathic VTs of left ventricular origin, P-potential mapping and for VTs that accompany organic heart disease, concealed entrainment in addition to early endocardial activation and pace-mapping were used for the purpose of tachycardia mapping. At the end of the mapping procedure RF energy with a frequency of 500 Khz, was applied to the target si tes, between the distal e leetrade of the deflectable abiat İon catheters and skin electrode (patch). Except one patient with heart disease (prior myocardial infarction), ablatioıı was successful in five of the six patients. The patient in whom RF ablation attempts were unsuccessful had a cardioverter-defibrillator implanted later on. The patients who had successful RF ablation procedure were asymptomatic during a mean duration of six months follow-up. The patient who had frequent VPBs before ablation, had no VPBs noted in the Halter recordings three months later. In conclusion, the RF eatlıeter ablation therapy of ventricular tachyeardias is effective and safe. This method may be the first clıoice of treatment especially in patients with idiopathic VTs.