Letter by Kardesoglu et al Regarding Article, “Efficacy of Long-Term β-Blocker Therapy for Secondary Prevention of Long-Term Outcomes After Coronary Artery Bypass Grafting Surgery”

In an observational study, Zhang et al1 reported the efficacy of long-term β-blocker therapy in 5926 consecutive patients undergoing coronary artery bypass grafting (CABG). They concluded, “in patients with or without previous myocardial infarction undergoing CABG, the consistent use of β-blockers was associated with a lower risk of long-term …