Substrate Characterization and Outcome of Catheter Ablation of Ventricular Tachycardia in Patients With Nonischemic Cardiomyopathy and Isolated Epicardial Scar.
Ioan LiubaDaniele MuserChoudhary Anwar A ChahalCory TschabrunnPasquale SantangeliLing KuoDavid S FrankelDavid J CallansFermin GarciaGregory E SuppleRobert D SchallerSanjay DixitDavid LinSaman NazarianRamanan KumareswaranJeffrey S ArklesMichael P RileyMatthew C HymanKatie WalshGustavo S GuandaliniMartín R ArceluzNaga Venkata K PothineniErica S ZadoFrancis E MarchlinskiPublished in: Circulation. Arrhythmia and electrophysiology (2021)
In patients with LV nonischemic cardiomyopathy and VT, the substrate may be confined to epicardial and commonly basal inferolateral. LV endocardial unipolar LVA and normal amplitude bipolar split electrograms identify epicardial LVA. Ablation targeting epicardial VT and substrate achieves good long-term VT-free survival. Greater endocardial unipolar than epicardial bipolar LVA and more inducible VTs predict VT recurrence.