Figure legends
Figure 1 A: Surface 12-lead ECG showing sinus rhythm with notched P-wave (left, pre-procedure) and without notched P-wave (right, post-procedure). B: The delayed coronary sinus (CS) potentials are identical only to the second component of the notched P wave (arrow). C: The notched P-wave disappeared after radio frequency applications in the CS. The amplitudes of the CS potentials were lower in intra-CS electrograms of post ablation. LA = left atrium.
Figure 2 A: Left lateral view of the activation map. Theblue circular tags indicate the earliest activation sites and theblue star tag indicates the site where pacing was performed.B: Pacing from the distal pair of electrodes of the catheter placed in the coronary sinus (CS) exhibiting a potential by 45 ms delay from the stimulation spike on the mapping catheter (Map) placed on the anterolateral wall of the mitral annulus. ABL = ablation catheter.
Figure 3 A: Recordings during the radiofrequency (RF) energy application. The arrhythmia was terminated by an RF application at a distal site in coronary sinus (CS). B: Fluoroscopic image during the successful RF application. The CS catheter was pulled back in order to allow the ablation catheter (ABL) to be cannulated into the distal CS. Eso = esophagus; LAA = left atrial appendage.