Figure 4.

A, Left atrial electroanatomic maps in anteroposterior (AP) view and posteroanterior (PA) view, showing location of sites at which vagal response was elicited (green points) in ostia of left pulmonary vein. Application of radiofrequency energy at these sites induced transient bradycardia (RR interval = 2.4 seconds). B, Left atrial electroanatomic maps in right‐lateral (RL) view and anteroposterior view, showing location of sites at which vagal response was elicited (green points) in ostia of right pulmonary vein. Application of radiofrequency energy at these sites resulted in sinus pause (RR interval N 7.7 seconds), artificial pacing had to use at coronary sinus(red arrow). AP, anteroposterior view; PA, posteroanterior view; RL, right lateral view