RADIOFREQUENCY CATHETER ABLATION OF SUSTAINED MONOMORPHIC VENTRICULAR-TACHYCARDIA IN HYPERTROPHIC CARDIOMYOPATHY

Monomorphic VT in HCM. Introduction: Incessant Monomorphic ventricular tachycardia (VT) with a right bundle branch block morphology and a no rthwest axis is a rare arrhythmic complication in a patient with hyper trophic cardiomyopathy and apical left ventricular aneurysm. Methods a nd Results: The origin of this VT was localized using the following cr iteria: the presence of entrainment without fusion, equal intervals fr om the stimulus to the beginning of the QRS complex and from the elect rogram to the QRS complex during VT, and the first postpacing interval identical to the tachycardia cycle length, Radiofrequency energy appl ied to the septoapical part of the apical left ventricular aneurysm te rminated the tachycardia within 2 seconds. Conclusion: Using criteria to guide radiofrequency (RF) ablation of VT in patients with coronary artery disease, an incessant monomorphic VT in a patient with hypertro phic cardiomyopathy was successfully ablated.