“…De novo procedures were related to the first implantation, whereas exchange involved a simple generator change, and revision was for correcting generator/lead position, hematoma evacuation, and implanting additional leads (atrial, right/left ventricular, or defibrillation leads), as previously described. 12 AHRE was defined as an atrial arrhythmia of >175 beats/min. 5,6, 13 Based on the maximum AHRE burden during the entire follow-up period, we classified the patients into 3 groups: (1) <6 min, (2) ≥6 min to 24 h, or (3) ≥24 h. The basis of using AHRE burden for dividing each group was established in a previous study.…”