Congenital nodal rhythm.
D004809:Ephedrine / Q000627:therapeutic use; D006327:Heart Block / Q000151:congenital*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012848:Sinoatrial Block / Q000151:congenital* / Q000188:drug therapy
D004809:Ephedrine