European Heart Rhythm Association (EHRA) consensus document on management of arrhythmias and cardiac electronic devices in the critically ill and post-surgery patient, endorsed by Heart Rhythm Society (HRS), Asia Pacific Heart Rhythm Society (APHRS), Cardiac Arrhythmia Society of Southern Africa (CASSA), and Latin American Heart Rhythm Society (LAHRS). Issue 1 (13th June 2018) - Boriani, Giuseppe; Fauchier, Laurent; Aguinaga, Luis; Beattie, James M; Blomstrom Lundqvist, Carina; Cohen, Ariel; Dan, Gheorghe-Andrei; Genovesi, Simonetta; Israel, Carsten; Joung, Boyoung; Kalarus, Zbigniew; Lampert, Rachel; et al.