The National Survey of Cardiac Pacemakers and Cardioverter Defibrillators - Poorbahador, Reza; Shad, Bijan; Oraii, Saeed; Eftekharzadeh, Mahmood; Mirmasoumi, Mehrdad; Ghorbani Sharif, Alireza; Taraghi, Mohammad Kazem; Hasanzadeh, Mehdi; Javadzadegan, Hassan; Zibaeenejad, Mohammad Javad; Zamani, Jalal; Shafieian, Gholamrerza; et al. (The Research in Heart Yield and Translational Medicine (RHYTHM))