Dapagliflozin, a sodium-glucose cotransporter-2 inhibitor (SGLT2i), increases natriuresis alone and synergistically when combined with loop diuretics in patients with AHF without increasing renin angiotensin- aldosterone activity. Thus, adding SGLT2i to the standard loop diuretic therapy might confer additional decongestive and natriuretic benefits while avoiding the adverse electrolyte abnormalities and neurohormonal activation associated with other diuretic combination. These potential benefits may help with improved clinical outcomes, but clinical evidence is still lacking.

Inclusion Criteria:

1. Adults aged 18 years or older who are hospitalized for hypervolemic AHF, with evidence of congestion defined as either:

   * 2 of the following signs or symptoms: peripheral edema, ascites, jugular venous pressure > 10mmHg, orthopnea, paroxysmal nocturnal dyspnea, 5-pound weight gain, or signs of congestion on chest x-ray or lung ultrasound.

   OR

   *If pulmonary artery catheterization is available, a pulmonary capillary wedge pressure greater than 19 mmHg plus a systemic physical exam finding of hypervolemia from the list above.

2. Randomized within 24 hours of hospitalization for AHF

3. Planned use of IV loop diuretic therapy during current hospitalization

4. Estimated glomerular filtration rate (eGFR) of at least 30 ml/min/1.73m2 by the MDRD equation

5. For diabetic patients, history of type 2 diabetes or a new hemoglobin A1c 6.5% on admission.

Exclusion Criteria:

1. Type 1 diabetes mellitus.
2. Dyspnea primarily due to non-cardiac causes.
3. Cardiogenic shock.
4. Acute coronary syndrome within 30 days prior to randomization.
5. Planned or recent percutaneous or surgical coronary intervention within 30 days prior to randomization.
6. Signs of ketoacidosis and/or hyperosmolar hyperglycemic syndrome (pH>7.30 and glucose >15 mmol/L and HCO3>18 mmol/L).
7. Pregnant or nursing (lactating) women.
8. Heart failure due to drug toxicity
9. Adherence to medication less than 95%