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Effects of Dapagliflozin on Left Atrial Ejection Force in Heart Failure with Preserved Ejection Fraction: DAPA-Left
Rupesh Agrawal1, Jamal Yusuf1, Ashish Kumar1
1Department of Cardiology, Govind Ballabh Pant Institute of Post Graduate Medical Education and Research, Delhi, India.
Insights
Sodium-glucose co-transporter-2 inhibitor therapy, specifically Dapagliflozin, was found to significantly reduce left atrial ejection force (LAEF) in patients with heart failure with preserved ejection fraction (HFpEF). This treatment also improved left atrial strain and left ventricular global longitudinal strain.
Area of Science:
- Cardiology
- Pharmacology
- Medical Research
Background:
- Left atrial ejection force (LAEF) quantifies the left atrium's (LA) contribution to ventricular filling.
- Understanding LAEF dynamics is crucial for managing heart failure with preserved ejection fraction (HFpEF).
Purpose of the Study:
- To evaluate the effect of sodium-glucose co-transporter-2 (SGLT-2) inhibitor therapy on LAEF in HFpEF patients.
- To assess secondary changes in diastolic function, left ventricular global longitudinal strain (LV-GLS), and LA strain parameters.
Main Methods:
- A prospective, randomized, open-label study involving 100 HFpEF patients.
- The intervention group received Dapagliflozin 10 mg daily plus guideline-directed medical therapy (GDMT); the control group received GDMT alone for 6 months.
Main Results:
- Dapagliflozin significantly reduced LAEF (P < .001) and left atrial volume index (P < .001).
- Improvements were observed in LV-GLS (P < .001) and all LA strain parameters (LA reservoir, contractile, and conduit strain; P < .001).
- Left ventricular mass index also significantly decreased (P < .001).
Conclusions:
- Dapagliflozin therapy effectively reduces LAEF in HFpEF patients.
- The SGLT-2 inhibitor demonstrates a role in promoting left atrial and left ventricular reverse remodeling.
Background:
Left atrial ejection force (LAEF) represents the force exerted by the left atrium (LA) to push blood into the left ventricle (LV) at the end of diastole. It is calculated as LAEF = 1/3 × mitral orifice area × (peak A velocity)2.
Methods:
The primary endpoint was to assess changes in LAEF after 6 months of sodium-glucose co-transporter-2 inhibitor (SGLT-2 inhibitor) therapy in patients with heart failure with preserved ejection fraction (HFpEF). Secondary endpoints include changes in diastolic function, LV global longitudinal strain (LV-GLS), and LA strain parameters.
Results:
In this single-center, prospective, randomized open-label study, 100 HFpEF patients were divided into 2 groups (n = 50 each). The study group received Dapagliflozin 10 mg daily along with guideline-directed medical therapy (GDMT) for 6 months, while the control group received only GDMT. The study group showed a significant reduction in LAEF (143.74 ± 10.33 to 134.4 ± 8.82; P < .001), LV-GLS improvement (-15.9 ± 4.13 to -17.1 ± 3.53; P < .001), and enhanced LA strain parameters (LA reservoir strain: 28.74 ± 9.31% to 36.39 ± 12.3%; LA contractile strain: -12.8 ± 5.41 to -17.89 ± 6.85; LA conduit strain: -15.97 ± 5.49 to -22.5 ± 8.25; all P < .001). Additionally, left ventricular mass index (199.9 ± 21.17 to 186.24 ± 16.77; P < .001) and left atrial volume index (36.17-32.21 mL/m2; P < .001) significantly decreased.
Conclusion:
Dapagliflozin significantly reduces LAEF while improving LA strain and LV-GLS, reinforcing its role in LA and LV reverse remodeling in patients with HFpEF.
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