Evaluation of Left Atrial Function in Patients with Hypertensive Heart Disease and Preserved Ejection Fraction Using Real-Time, Three- Dimensional Speckle Tracking Imaging.

Objective This research investigated the application of real-time, three-dimensional speckle tracking imaging (RT-3D-STI) to evaluate left atrial (LA) function in individuals suffering from hypertensive heart disease (HHD) and heart failure with preserved ejection fraction (HFpEF).Material and methods This retrospective study included 100 patients with HHD and HFpEF hospitalized from August 2023to June 2024 (HFpEF group). 100 healthy individuals undergoing physical examinations comprised the control group. Patient data were collected, and echocardiography was performed to measure LA diameter (LAD), left ventricular end diastolic diameter (LVEDD), interventricular septal thickness (IVST), left ventricular posterior wall thickness (LVPWT), left ventricular outflow tract diameter (LVOTd), early diastolic maximum velocity of mitral valve inflow (MVE), late diastolic maximum velocity of mitral valve inflow (MVA), early diastolic and late diastolic velocities of mitral annulus measured by tissue Doppler ultrasound (e' and a'), tricuspid annular plane systolic excursion (TAPSE), and left ventricular ejection fraction (LVEF). The LA images were analyzed using GE software, and the following parameters were measured: L emptying fraction (LAEF), LA emptying volume (LAEV), LAvolume at the onset of contraction (LAVpreA), minimum LA volume (LAVmin), maximum LA volume (LAVmax), LA strain during the reservoir phase (LASr), LA strain during the contraction phase (LASct), and LA strain during the conduit phase (LAScd). ROC curves were adopted to evaluate the diagnostic value of LA parameters for HFpEF, and a Pearson correlation analysis examined the relationship between these parameters and N-terminal pro-B-type natriuretic peptide (NT-proBNP).Results Compared with the control group, the blood pressure in the HFpEF group was significantly higher (p<0.05). In the HFpEF group, NT-proBNP concentrations were significantly greater than those observed in the control group (p<0.05). No statistically significant variances were detected in LVEF, LVEDD, LVOTd, TAPSE, MVE, MVA, ratio of E wave velocity to A wave velocity (E / A), a', LAEV, LAVmin, or LAVpreA between the two groups (p>0.05). Compared to the control group, the HFpEF group had dramatically higher LAD, IVST, and LVPWT (p<0.05). The HFpEF group also had lower e', LAEF, LASr, LAScd, and LASct, while E / e', maximum LA volume index (LAV Imax), and LAVmax were higher (p<0.05). LASr was negatively associated with NT-proBNP (r=-0.255, p=0.016), whereas no significant correlation was found among LAScd, LASct, and NT-proBNP (P>0.05).Conclusion LA strain parameters can serve as a non-invasive method for quantitatively assessing LA dysfunction in patients with HFpEF.