Fig. 1
From: Ablation of idiopathic ventricular arrhythmias originating from basal cardiac crux region
a A 12-lead ECG of clinical VT. b Intracardiac EGM at the basal infero-septum of RV (the transient suppression site of VT). c Left panel: right ventriculography. Right panel: ablation catheter positioning at the successful site. d Left panel: intracardiac EGM at the successful ablation site during VT showed V and A signals at the distal ablation catheter. A and V signals were also noted at the distal ablation catheter during atrial pacing. Middle panel: electro-anatomical mapping showed the successful ablation site (white arrow) from an RA approach close to the CS ostium (slow pathway region). Right panel: cardiac CT scan revealed the RA adjacent-side to the basal infero-septum of the LV (black arrow). CS indicates coronary sinus; EGM, electrogram; LAO, left anterior oblique view; LA, left atrium; LV, left ventricle; RA, right atrium; RAO, right anterior oblique view; RV, right ventricle