Indications for therapy of patients with early repolarization syndrome. Recommendations with Class designations are taken from Priori SG, Wilde AA, Horie M, et al. HRS/EHRA/APHRS expert consensus statement on the diagnosis and management of patients with inherited primary arrhythmia syndromes: document endorsed by HRS, EHRA, and APHRS in May 2013 and by ACCF, AHA, PACES, and AEPC in June 2013. Heart Rhythm 2013;10:1932–1963, and Priori SG, Blomstrom-Lundqvist C, Mazzanti A, et al. 2015 ESC guidelines for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death: The Task Force for the Management of Patients with Ventricular Arrhythmias and the Prevention of Sudden Cardiac Death of the European Society of Cardiology (ESC). Endorsed by: Association for European Paediatric and Congenital Cardiology (AEPC). Eur Heart J 2015;36: 2757–9. Recommendations without Class designations are derived from unanimous consensus of the authors. ER = early repolarization; ICD = implantable cardioverter-defibrillator; ILR = implantable loop recorder; NAR = nocturnal agonal respiration; VT = ventricular tachycardia.