[Idiopathyc progressive disorder of atrioventricular conductivity].

Atrioventricular (AV) blockades are classified into congenital and acquired ones. Conductive system fibrosis or sclerosis and coronary heart disease are the most frequent reasons for disturbances in AV conductivity. Congenital AV conductivity disorder may be associated with an isolated lesion of the AV conductive system or with other congenital diseases of the heart. The author describes a case of AV conductivity disorder which has been progressing for many years.