Phentolamine in heart block.
D000208:Acute Disease; D006327:Heart Block / Q000150:complications / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications; D010646:Phentolamine / Q000627:therapeutic use*
D010646:Phentolamine