The study population consists of all consecutive adults patients seen in the Emergency department of an acute care hospital and treated actively for Acute Decompensated Heart Failure (ADHF) where the condition is defined clinically as new onset of Heart Failure with decompensation or chronic heart failure with decompensation. Patient eligibility is based upon the presence of a hospital discharge and/or Emergency department diagnosis of ADHF and is not tied to the use of any specific therapeutic agent or regimen.