[A study on the course of the atrioventricular conduction system in congenital heart disease: electrophysiologic delineation and histologic investigation. 2. Histologic study].
D006329:Heart Conduction System / Q000473:pathology*; D006330:Heart Defects, Congenital / Q000473:pathology*; D006801:Humans; D007223:Infant