Loop Diuretic Therapy in Acutely Decompensated Heart Failure

Inclusion Criteria: * Patients over 18 years; * Patients with diagnosis of ADHF(dyspnea, orthopnea, peripheral edema or major fatigue and at least two clinical signs including rales, hepatomegaly, pulmonary congestion on chest radiography, jugular vein dilatation, or a third heart sound); * Blood BNP \> 100 pg/mL; ADHF: Acute Decompensated Heart Failure; BNP: B-type Natriuretic Peptide; IV: IntraVenous; LVEF: Left Ventricular Ejection Fraction. Exclusion Criteria: * Patients who receive more than 40 mg of IV furosemide; * End-Stage renal disease or renal replacement therapy; * Recent myocardial infarction (within thirty days of screening); * Systolic blood pressure \< 80 mmHg; * Creatinine levels \> 4 mg/dL; * Patients affected by sepsis, liver diseases, inflammatory diseases or neoplastic diseases.