 The overall objective of the study is to determine whether speckle tracking echocardiography presents additional prognostic value to the routine assessment clinical and echocardiographic in patients admitted with acute decompensated heart failure ADHF at the emergency department. Specific objectives: 1 - To evaluate the association between changes in the cardiac contractile mechanics by serial measurements of strain, strain rate, displacement velocity, rotation and ventricular torsion with clinical outcomes in ADHF. 2 - Evaluate the possible association of these parameters with biomarkers of neurohormonal activity, myocardial injury, fibrosis and myocardial remodeling, inflammatory activity, and cardiorenal syndrome. 