Kaplan–Meier curves comparing survival in patients treated with beta-blockers to patients not treated with beta-blockers followed by a Cox proportional hazards regression analysis: (A) treatment with beta-blockers vs. no treatment with beta-blockers in the overall population, (B) treatment with beta-blockers vs. no treatment with beta-blockers in patients with a LVEF ≤40%, (C) treatment with beta-blockers vs. no treatment with beta-blockers in patients with a LVEF >40%