The aim of this study was to investigate the New York Heart Association (NYHA) classification, thyroid status (measuring free triiodothyronine (fT3), free thyroxine (fT4), Thyroid-stimulating hormone (TSH)) and possible changes regarding medicament treatment (furosemide, angiotensin-converting-enzyme (ACE) inhibitors, beta blockers (BB), spironolactone and digoxin) in hospitalized elderly (≥65 yr) patients with HF. This evidence concerns the gene ACE and hydrops fetalis.