Resting heart rate associates with one-year risk of major adverse cardiovascular events in patients with acute coronary syndrome after percutaneous coronary intervention

The study was to access the association between resting heart rate (RHR) and one-year risk of major adverse cardiovascular events (MACE) in acute coronary syndrome (ACS) patients after percutaneous coronary intervention (PCI). Patients with ACS after PCI (n=808) were prospectively followed-up for MACE. RHR was obtained from electrocardiogram. MACE was defined as a composite of cardiac death, nonfatal recurrent myocardial infarction, ischemic-driven revascularization, and ischemic stroke. The association between RHR and one-year risk of MACE was assessed using Cox proportional hazards regression model. Compared with patients with RHR >76bpm, the adjusted hazard ratio (AHR) was 0.51 (95% confidence intervals [CI]: 0.23-1.14; P=0.100) for patients with RHR<61bpm, and 0.44 (95%CI: 0.23-0.85; P=0.014) for those with RHR 61-76bpm. For patients with RHR >= 61bpm, an increase of 10bpm in RHR was associated with an increase by 38.0% in the risk of MACE (AHR: 1.38; 95% CI: 1.04-1.83; P=0.026). ACS patients after PCI with RHR>76bpm were at higher risk of MACE during one-year follow-up compared with patients with RHR >= 61-76bpm. An elevated RHR61bpm was associated with increased risk of one-year MACE in ACS patients.