Abstract: This paper reviews the ageing changes of the human cardiac conduction system according to the ever published literature. In ageing process, the cardiac conduction system shows typical physiological changes: (1) differentiation, development and maturation in fetal and postnatal period, (2)reduction of the specific conduction cells and the changes of the whole node volumes. (3) fibrosis and fat infiltration. It is stressed that while explaning the causes of sudden death with the knowledge of cardiac conduction system diseases, the forensic pathologist ahould be able to distinguish the pathological changes from that of the normalagemg.

Key words: cardiac conduction system. ageing changes