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Outflow tracts are common sites of origin for ventricular tachycardia (VT) or a ventricular premature complex (VPC), especially in young patients without structural heart disease. Up to 90% of outflow tract VT is considered to originate from the right side, mainly from the right ventricular outflow tract (RVOT).1 Left ventricular outflow tract (LVOT) tachycardia can arise from any aspect of the heart, including endocardial or epicardial sites.2 The origin of idiopathic outflow tract VT can be closely related to important adjacent structures like the aortic valve leaflet and coronary artery; therefore, radiofrequency (RF) ablation can damage these structures without an understanding of the anatomical relationships.3,4 In this respect, intracardiac echocardiography (ICE) can improve the safety and efficacy of RF ablation by identifying anatomical details not visible by fluoroscopy and by confirming stable catheter placement and lesion formation at the target site.5,6

international journal of arrhythmia

Radiofrequency Ablation of Recurrent Ventricular Premature Complex Originating from near Left Ventricular Summit Guided by Intracardiac Echocardiography