Visualization of local abnormal ventricular activities in scar-related ventricular tachycardia. A novel strategy.
A 73-year old man was admitted for ventricular tachycardia (VT) ablation due to symptomatic sustained VT-initiated VVI-ICD therapies. Based on voltage mapping, the initial ablation did not result in the endpoint noninducibility of VT. Using a new visualization technique, we mapped the discriminated local abnormal ventricular activations (LAVAs) within the scar which could then be ablated successfully. This new visualization method may be helpful especially in patients with ischemic cardiomyopathy, extensive scars, and frequent LAVAs to identify further areas suited for ablation.