GP mapping and ablation in the right atrium
After LA ablation, the catheter was withdrawn to the right atrium (RA) and the anatomy of the RA was obtained. The superior and inferior vena cava, the interatrial septum and coronary sinus ostium were identified. In the RA (Figure 2) we marked the empiric location of the right aspect of GP, opposite to the area of the LA GP ablation (Figure 3), at the septal aspect of the superior vena cava junction and the posterior aspect of the interatrial septum (between the posterior wall and the coronary sinus ostia) (1). In the RA we made RF lesions for 30 seconds at 35W and a temperature of 43ÂșC. The endpoints were as on the LA, the deployment of lesions in all pre-specified ablation sites at the specified described parameters.