Figure 3: ECG during the ablation procedure. Panel A Ventricular fibrillation during ablation Panel B Sinus rhythm with ST interval elevation in the V1-V3 and inferior leads. Panel C Sinus rhythm with preexcitation before ablation. Panel D Sinus rhythm without preexcitation after ablation. Panel E Fluoroscopic view of the ablation site. Panel F Coronary angiogram of the left coronary in correlation with the ablation site.