Alternative site pacing at the RA septum versus conventional RA appendage ( hazard ratio = 1.18 ; 95 % confidence interval , 0.79-1 .75 ; P = 0.65 ) or continuous atrial overdrive pacing ON versus OFF ( hazard ratio = 1.17 ; 95 % confidence interval , 0.79-1 .74 ; P = 0.69 ) did not prevent the development of persistent AF .
