Figure3. Flowchart of mapping and ablation procedure in this study.
Figure4. An example of successful ablation of premature ventricular complex (PVC) originating from Summit-CV by SS approach. A. Twelve-lead ECG 3 morphology of the clinical PVC. The PVC showed R wave in II, III, aVF, V4-V6, rS morphology in lead V1, the precordial transition zone of PVC was earlier than sinus beat. B. By NS approach, the irrigated catheter could reach the distal portion of GCV. SS approach was then applied in this patient. By SS approach, the irrigated catheter reached the target site in summit-CV. The local ventricular activation time recorded at the summit-CV preceded the onset of the QRS complex by 52 ms, and perfect pace-match was achieved by pacing at summit-CV. C1-C3. Fluoscopic view of target site in summit-CV. D. Radiofrequency energy delivered on target site for 5s led an acute disappearance of target PVCs.