The objective is to compile a clinical database on the strategy for the medical management of patients hospitalized with acute Heart Failure (HF). Through the use of the information collected from acute care hospitals across the United States the following information may be coming out of this study: 1) Assist hospitals in evaluating and improving quality of care for patients with acute HF by tracking quality indicators and providing benchmark data reports; 2) Describe the demographic and clinical characteristics of patients who are hospitalized with acute HF; 3) Characterize the initial emergency department evaluation and subsequent inpatient management of patients hospitalized with acute HF; 4) Identify patient characteristics and medical care practices associated with improved health outcomes in those hospitalized with acute HF; 5) Characterize trends and changes over time in the management of acute HF; 6) Offer surveillance of adherence to practice guidelines as these emerge for the inpatient management of acute HF. Observational Study - No investigational drug administered