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Patient 1. A: Pace-map correlation maps showing a highest correlation in the proximal coronary sinus (CS; red arrow). B: Signals recorded at the ablation site in sinus. C: Premature ventricular contraction (left panel) and paced QRS from the left ventricle (middle panel) and from the CS (right panel). An average pace-map match of 96% was found while pacing from the CS. D, E: Rhythm strips before and after the procedure, respectively.
