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Figure 4 Graph showing mean number of atrial fibrillation (AF) episodes per month by pacing subgroup. BiA 16 = simultaneous biatrial pacing (16-ms delay); BiA 70 = sequential biatrial pacing (70-ms delay); BIA(D)16 = simultaneous biatrial pacing with a DCS lead; BIA(D)70 = sequential biatrial pacing with a DCS lead; BIA(P)16 = simultaneous biatrial pacing with a PCS lead; BIA(P)70 = sequential biatrial pacing with a PCS lead; CS = coronary sinus pacing; DCS = distal coronary sinus pacing; HRA = high right atrial pacing; PCS = proximal coronary sinus pacing; RA = right atrial pacing; RAA = right atrial appendage pacing.