[Dispersion of junctional tissue and its consequences in a case of sudden infant death].

This article reports a case of sudden infant death syndrome in a 1-month-old male. Some important abnormalities of the cardiac conduction system were found, consisting of persistent fetal dispersion of the atrioventricular node and His bundle, accessory atrioventricular pathways of Mahaim type and resorptive degeneration. These changes could be considered as a morphological substrate for cardiac arrhythmias.