Aging changes in the human atrioventricular node, bundle, and bundle branches.
D000368:Aged / Q000502:physiology; D000375:Aging; D001283:Atrioventricular Node; D006321:Heart / Q000033:anatomy & histology*; D006329:Heart Conduction System; D006652:Histological Techniques; D006801:Humans
AGED/physiology; HEART/anatomy and histology