*<unk>  conduction disease (AV block) describes impairment of the electrical continuity between the atria and ventricles. It occurs when the atrial depolarization fail to reach the ventricles or is conducted with an abnormally long delay. It can result from an injury or be a genetically inherited disorder. *<unk> l re-entry tachycardia. * Cystic tumour of<unk> l region (CTAVN) CTAVN is of endodermal origin and occurs exclusively in the area of the AV node, tricuspid valve, and interatrial septum.
Atrioventricular node
Node of Ranvier
Heart valve
Cardiopulmonary nerves
Vasa vasorum
Endobronchial valve
Coronary
Sternal saw