Heart Failure Physiology Physiology of Diuretics in Acute Heart Failure Updating the role of natriuretic peptide levels in cardiovascular disease Impact of body mass and body composition on circulating levels of natriuretic peptides The paradox of low BNP levels in obesity Risk Assessment Prognostic Biomarkers in the ED in HF Correction to: Drugs That May Cause or Exacerbate Heart Failure: A Scientific Statement From the American Heart Association Acute Chronic Heart Failure