Low-dose beta blockade in the treatment of chronic cardiac failure.
D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use*; D000328:Adult; D006333:Heart Failure / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008790:Metoprolol / Q000627:therapeutic use; D008875:Middle Aged; D011433:Propranolol / Q000627:therapeutic use
D000319:Adrenergic beta-Antagonists; D011433:Propranolol; D008790:Metoprolol