LAUSR

Background Impaired left ventricular (LV) relaxation is indicative of grade I diastolic dysfunction, which is mainly assessed by late diastolic transmitral flow velocity (E/A ratio). Although the E/A ratio has important diagnostic and prognostic implications with cardiac outcomes, the causal link between abnormal E/A ratio and left ventricle remodeling (LV remodeling) remains unclear. Methods A longitudinal analysis of 869 eligible women aged ≥45 years, who had received echocardiography scans as well as 5-year follow-up assessments between 2015 and 2020. Women with pre-existing cardiac abnormalities including grade II/III diastolic dysfunction as diagnosed by echocardiography, or structural heart disease were excluded. E/A abnormality was defined as baseline E/A ratio <0.8. The classification of LV remodeling was based on the measurements of left ventricular mass index (LVMI) and relative wall thickness (RWT). Logistic and linear regression models were used. Results Among the 869 women (60.71±10.01 years), 164 (18.9%) had developed LV remodeling after the 5-year follow-up. The proportion of women with E/A abnormality versus non-abnormality was also significantly different (27.13% vs 16.59%, P=0.007). Multivariable-adjusted regression models showed that E/A abnormality (OR: 4.14, 95%Cl:1.80–9.20, P=0.009) was significantly associated with higher risk of concentric hypertrophy (CH) after follow-up. No such association was found in either concentric remodeling (CR) or eccentric hypertrophy (EH). Higher baseline E/A ratio was correlated with lower ΔRWT during the 5-year follow-up (β=−0.006 m/s, 95% CI: −0.012 to −0.002, P=0.025), which was independent of demographics and biological factors. Conclusion E/A abnormality is associated with a higher risk of CH. Higher baseline E/A ratio may be associated with decreased relative changes in RWT.