Improved Atrial Mechanical Efficiency During Alternate- and Multiple-Site Atrial Pacing Compared With Conventional Right Atrial Appendage Pacing: Implications for Selective Site Pacing to Prevent Atrial Fibrillation

To the Editor: Alternate- and multiple-site atrial pacing (AP) have been proposed as methods to prevent atrial fibrillation (AF) ([1,2][1]). However, changes in atrial activation by alternate- or multiple-site(s) AP might adversely affect atrial mechanical function and cardiac performance via