Abstract
Background: Patients with heart failure with preserved ejection fraction (HFpEF) account for more than half of all heart failure patients. The most common method for assessing left ventricular diastolic dysfunction is echocardiography. Left atria longitudinal strain derived from speckle tracking echocardiography is also sensitive in estimating intracavitary pressures. It helps the treatment and prognosis of clinical disorders. The study aimed to assess the change of LA strain in HF with a range above 40% ejection fraction using two-dimensional speckle tracking echocardiography (2DSTE). Methods: Cross-sectional descriptive research design. Results: STE was used to survey 75 patients with a range above 40% ejection fraction. The results revealed that LA conduit strain (LASct) in the 4-chamber view is -8.95 ±5.69%, the 2-chamber view is -10.21± 9.24% and LA reservoir strain in the 4-chamber view is 22,09 ± 5,99% and in 2-chamber view is 26,23 ± 10,43%, LA contractile strain in 4-chamber view is -13,21 ± 4,54% and in the 2-chamber view is -16,37 ± 8,24%. All of these metrics are below those of a population that is in good health. The HFmrEF group had lower LASr and LASct values than the HFpEF group (respectively, 20.19 ± 5.91% vs 27.78 ±5.16% and -11.88 4.4% vs -17.48 4.32% and p<0.05). Conclusion: in patients with heart failure with an ejection fraction ≥ 40%, left atrial strain on speckle tracking echocardiography was shown to be lower than in the healthy population in both LASr, LASct, and LAScd. The left atrial reservoir strain and LA contractile strain on speckle tracking echocardiography were lower in the HFmrEF group than in the HFpEF.