Abstract
Objectives: To review the status of heart rate (HR) control and to identify associated factors among inpatients with acute myocardial infarction (AMI) at Viet Tiep Friendship Hospital. Subjects and research methods: This cross‑sectional descriptive study included 88 patients diagnosed with AMI from January 2025 to May 2025. Data on demographics, clinical features, laboratory tests, echocardiography, and treatments were collected. HR was measured at discharge, and “optimal control” was defined as HR ≤ 70 beats per minute (bpm). Univariate and multivariate logistic regression models were employed to identify factors associated with poor HR control. Results: The mean age of the cohort was 67.02 ± 9.18 years, with males comprising 64.77 %. The proportion of patients achieving optimal HR control at discharge was low (40.9 %). In univariate analysis, factors significantly associated with poor HR control included overweight (BMI ≥ 23 kg/m²; OR = 2.78; 95% CI: 1.07–7.23; p = 0.03), diabetes mellitus (OR = 4.61; 95% CI: 1.41–15.03; p = 0.01), female sex (OR = 2.78; 95% CI: 1.07–7.23; p = 0.03), apical regional wall motion abnormality on Doppler echocardiography (OR = 5.34; 95% CI: 1.43–19.93; p = 0.01), and use of atorvastatin (versus rosuvastatin) (OR = 3.56; 95% CI: 1.08–11.74; p = 0.03). Protective associations (i.e. factors associated with better HR control) included smoking (OR = 0.29; 95% CI: 0.12–0.73; p = 0.01) and successful revascularization of the right coronary artery (RCA) (OR = 0.32; 95% CI: 0.13–0.79; p = 0.01). In the multivariate logistic regression, independent factors associated with poor HR control were: diabetes mellitus (OR = 19.68; 95% CI: 1.02–380.86; p = 0.04), overweight (OR = 11.58; 95% CI: 1.50–85.59; p = 0.02), apical wall motion abnormality (OR = 19.08; 95% CI: 1.59–229.07; p = 0.02), use of atorvastatin instead of rosuvastatin (OR = 10.52; 95% CI: 1.34–82.60; p = 0.03), and absence of percutaneous intervention in the RCA branch (OR = 10.67; 95% CI: 1.48–76.84; p = 0.02). Conclusion: The proportion of post‑AMI inpatients who achieve optimal HR control at discharge remains suboptimal. Key factors independently associated with poor HR control include diabetes, overweight status, apical wall motion abnormalities, choice of statin (atorvastatin vs. rosuvastatin), and lack of intervention in the RCA branch.