Table 1.

2013 HRS/EHRA/APHRS Expert Consensus Statement recommendations for ICD implantation in early repolarization syndrome patients.

Class I	1. ICD implantation is recommended in patients with a diagnosis of early repolarization syndrome who have survived a cardiac arrest.
Class IIa	2. Isoproterenol infusion can be useful in suppressing electrical storms in patients with a diagnosis of early repolarization syndrome. 3. Quinidine in addition to an ICD can be useful for secondary prevention of VF in patients with a diagnosis of early repolarization syndrome.
Class IIb	4. ICD implantation may be considered in symptomatic family members of early repolarization syndrome patients with a history of syncope in the presence of ST segment elevation >1mm in 2 or more inferior or lateral leads. 5. ICD implantation may be considered in asymptomatic individuals who demonstrate a high-risk early repolarization ECG pattern (high J-wave amplitude, horizontal/descending ST-segment) in the presence of a strong family history of juvenile unexplained sudden death with or without a pathogenic mutation.
Class III	6. ICD implantation is not recommended in asymptomatic patients with an isolated early repolarization ECG pattern.