Fig. 3.

Ablation of a VT in a patient with NIDCM. (A) Surface ECG during the VT. (B) Intracardiac ECG at the ablation site during the VT. (C) Voltage and activation maps during the VT of the endocardium (1) and epicardium (2). On the endocardium, there is no abnormal low voltage area and the VT exhibits a focal activation pattern (C-1). However, a low voltage area is seen in the anterior region on the epicardium and the VT shows a macroreentry. An RF application targeting diastolic potentials (B: arrow) inside the low voltage area terminated the VT.