Figure legends
Figure 1 . Flowchart of study patients with ventricular arrhythmias. PVC: premature ventricular complexes; VT: ventricular tachycardia; ICE: intracardiac echocardiography.
Figure 2 . The representative 12-lead electrocardiograms of ventricular arrhythmias from different origins (A) and distribution of origins (B). RVOT: right ventricular outflow tract; LVOT: left ventricular outflow tract
Figure 3 . Kaplan-Meier curves for cumulative survival free from long-term outcome between control and ICE group (A) and long-term success rate from different origins between control and ICE groups (B). ICE: intracardiac echocardiography; RVOT: right ventricular outflow tract; LVOT: left ventricular outflow tract.
Figure 4 . Multivariate analysis for predictors of acute procedural success (A) and long-term success (B). LVEF: left ventricular ejection fraction; LVEDD: left ventricular end-diastolic diameter; PVC: premature ventricular complexes; RVOT: right ventricular outflow tract; LVOT: left ventricular outflow tract; OTs: outflow tracts; TIA: transient ischemic attack.
Supplementary Figure 1 . Ventricular arrythmias ablation from left anterolateral papillary muscle with 3D electroanatomical map (CARTO 3, Johnson and Johnson, Inc.) only or in combination with intracardiac echocardiography use (5–10 MHz, Johnson and Johnson, Inc.) was decided by consultation between patients and doctors before procedure. A: intracardial structure was constructed with an adjustable catheter. At the blue points, the local activation time was the earlier than the referenced point about 62ms and than the earliest activation point of surface ECG about 32ms. Ventricular tachycardia eliminated within 3 seconds after ablation and without recurrence during 30 minutes observation time. B: intracardial structure was constructed with intracardiac echocardiography and ablation catheter. As presented in the lower right corner, papillary muscle and catheter were real-time observation. Ventricular premature complexes were eliminated after identifying the ideal site.