“…Bi-atrial pacing, as a measure to prevent the onset of POAF, has been shown to be successful in many clinical studies and meta-analyses [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ], and have been included in the European Guidelines for cardiac surgery patients, even in the absence of a commercially available bi-atrial pacemaker device. Similarly, low-energy internal cardioversion of POAF has also been used for some time [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], and good results have already been achieved with this technique. However, the procedures were less practicable because they required complex fixation of the electrodes, and two separate devices were required for postoperative pacing and low-energy cardioversion.…”