BACKGROUND: Idiopathic ventricular tachycardia (VT) and/or premature ventricular contractions (PVCs) arise most commonly from the right ventricular outflow tract and less frequently from the left ventricular outflow tract (LVOT), either below or above the semilunar valves. CASE PRESENTATION: We report a case of 24-year-old man with idiopathic ventricular tachycardia from a single focus in the supravalvular left ventricular outflow tract with two extremely divergent breakouts observed during the ablation procedure. CONCLUSION: Focal sources of ventricular arrhythmia in the aortic root may have different preferential exits and meticulous activation sequence mapping is the preferable strategy to delineate the site of origin.

• MeSH
• Action Potentials MeSH
• Electrophysiologic Techniques, Cardiac MeSH
• Electrocardiography MeSH
• Catheter Ablation MeSH
• Tachycardia, Ventricular diagnosis   physiopathology   surgery   MeSH
• Ventricular Premature Complexes diagnosis   physiopathology   surgery   MeSH
• Humans MeSH
• Young Adult MeSH
• Predictive Value of Tests MeSH
• Heart Conduction System physiopathology   surgery   MeSH
• Heart Ventricles physiopathology   surgery   MeSH
• Treatment Outcome MeSH
• Check Tag
• Humans MeSH
• Young Adult MeSH
• Male MeSH
• Publication type
• Journal Article MeSH
• Case Reports MeSH