Inclusion criteria:  age >18 years; males and females (females of child bearing potential must be using adequate contraceptive precautions) diagnosis of heart failure (New York Heart Association [NYHA] functional class II to III); Left ventricular ejection fraction <40%; stable symptoms and medical therapy within the last month. Informed consent has to be given in written form  Exclusion criteria:  taking SGLT2i in the last month acute coronary syndrome or cardiac surgery within the last month; estimated glomerular filtration rate <20 ml/kg/min; use of continuous parental inotropic agents; systolic blood pressure <90 mm Hg; LVAD implantation or cardiac transplantation pregnant or lactating women; and any other medical condition considered unappropriated by a study physician