Abstract
Objective: To evaluate right ventricular function using echocardiography in patients with ST-segment elevation myocardial infarction (STEMI) complicated by cardiogenic shock, and to investigate the association between right ventricular function and clinical characteristics, paraclinical findings, and 30-day mortality prognosis. Methods: A cross-sectional descriptive study with longitudinal follow-up was conducted in 30 patients with STEMI complicated by cardiogenic shock at SCAI stage C, treated in the Emergency Department and Intensive Care Unit of the Vietnam National Heart Institute, Bach Mai Hospital, from March 2024 to November 2025. Results: The mean age of the study population was 68 ± 9.1 years, with males accounting for 66.4%. Right ventricular functional parameters were as follows: mean TAPSE was 16.4 ± 4.7 mm, with a prevalence of right ventricular dysfunction (TAPSE < 17 mm) of 50%; mean FAC was 37.5 ± 8.5%, with 33.3% of patients having FAC < 35%; mean S′ wave velocity was 11.3 ± 2.46 cm/s, and 26.7% of patients had S′ < 9.5 cm/s. S′ velocity was significantly lower in the mortality group compared with the survival group (8.16 ± 2.02 cm/s vs. 12.48 ± 3.57 cm/s; p < 0.05). At a cutoff value of S′ = 10.2 cm/s, this parameter predicted 30-day mortality with a sensitivity of 80.0% and a specificity of 73.3%. TAPSE, FAC, and S′ values were lower in patients with left anterior descending artery (LAD) culprit lesions compared with those with right coronary artery (RCA) lesions; however, these differences were not statistically significant.
