Arterial blood supply of the atrioventricular node and main bundle.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000790:Angiocardiography; D001158:Arteries; D001344:Autopsy; D002648:Child; D003326:Coronary Circulation; D006321:Heart / Q000033:anatomy & histology; D006329:Heart Conduction System / Q000098:blood supply*; D006801:Humans; D008875:Middle Aged