The effect of potassium on the ventricular excitability threshold in patients with implanted cardiac pacemakers.
D000368:Aged; D005260:Female; D006327:Heart Block / Q000188:drug therapy*; D006801:Humans; D007008:Hypokalemia / Q000188:drug therapy; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011188:Potassium / Q000627:therapeutic use*
D011188:Potassium