Prognostic impact of the right-to-left atrial volume index ratio on mortality and length of stay in patients undergoing coronary artery bypass grafting

Atrial remodeling is a key mechanism influencing prognosis in cardiovascular diseases [1]. This study aimed to investigate the prognostic value of the right-to-left atrial volume index ratio (RAVI/LAVI) for 2-month all-cause mortality and length of hospital stay in patients undergoing coronary artery bypass grafting (CABG). In this single-center retrospective observational study, a total of 267 hospitalized patients were included. Patients were stratified into two groups according to the median RAVI/LAVI ratio (median value = 0.78) (below-median vs. above-median). Clinical, laboratory, and echocardiographic variables were compared between groups. The primary endpoint was 2-month all-cause mortality after CABG, and the secondary endpoint was length of hospital stay. Predictors of mortality were evaluated using logistic regression analysis. Mortality was significantly higher in the high RAVI/LAVI group (35.2% vs. 12.8%, p < 0.001), and the length of hospital stay was markedly longer (24.9 days vs. 11.4 days, p < 0.001). In multivariable logistic regression analysis, the RAVI/LAVI ratio remained an independent predictor of mortality (OR 6.67; 95% CI 1.96–22.73; p = 0.002). The RAVI/LAVI ratio demonstrates a strong and independent association with mortality and length of hospital stay. This ratio may represent a practical and robust echocardiographic marker for risk stratification in vascular and cardiac patients.