David F. Katz et al. JACEP 2016;j.jacep.2016.06.001 Flow Chart and Patient Outcomes (A) Flow chart of patient inclusion. (B) Kaplan-Meier survival curve for the entire cohort. (C) Kaplan-Meier survival curve for the hierarchical groups. Difference among the groups: p < 0.0001. ICD = implantable cardioverter-defibrillator; NCDR = National Cardiovascular Data Registry; SCD sudden cardiac death; VT = ventricular tachycardia. David F. Katz et al. JACEP 2016;j.jacep.2016.06.001 American College of Cardiology Foundation