Extra impulse-conducting tissue in the heart that creates abnormal impulse-conducting connections between HEART ATRIA and HEART VENTRICLES.

Synonyms: Mahaim Fibers, Fiber, Atriohisian, Atriohisian Fibers, Pathways, Fasciculoventricular, Pathways, Accessory Atrioventricular, Accessory Pathway, Concealed, Atriohisian Tract, Pathway, Accessory Conducting, Accessory Pathways, Nodoventricular, Tracts, Atrio-Hisian Bypass, Pathway, Concealed Accessory, Mahaim Fiber, Bundle, Accessory Atrioventricular, Fasciculoventricular Accessory Pathways, Concealed Accessory Pathway, Conducting Pathways, Accessory, Accessory Atrioventricular Bundle, Accessory Conducting Pathway, Accessory Atrioventricular Bundles, Atriohisian Fiber, Atrio-Hisian Bypass Tracts, Tracts, Atriohisian, Accessory Pathways, Concealed, Accessory Conducting Pathways, Bundle, Kent, Fasciculoventricular Accessory Pathway, James Fibers, Pathways, Accessory Conducting, Pathways, Concealed Accessory, Atriohisian Tracts, Concealed Accessory Pathways, Pathways, Nodoventricular, Tract, Atrio-Hisian Bypass, Pathway, Nodoventricular Accessory, Accessory Pathway, Nodoventricular, Nodoventricular Pathway, Fiber, Mahaim, Bundle of Kent, Pathway, Nodoventricular, Pathway, Fasciculoventricular, Nodoventricular Accessory Pathways, Tract, Atriohisian, Pathways, Fasciculoventricular Accessory, Fibers, Mahaim, Accessory Pathways, Fasciculoventricular, Pathway, Fasciculoventricular Accessory, Bundles, Accessory Atrioventricular, Nodoventricular Pathways, Nodoventricular Accessory Pathway, Accessory Atrioventricular Pathways, Accessory Atrioventricular Pathway, Atrioventricular Pathway, Accessory, Pathway, Accessory Atrioventricular, Fibers, Atriohisian, Atrio-Hisian Bypass Tract, Fibers, James, Atrioventricular Bundle, Accessory, Atrioventricular Pathways, Accessory, Fasciculoventricular Pathway, Bypass Tracts, Atrio-Hisian, Accessory Pathway, Fasciculoventricular, Pathways, Nodoventricular Accessory, Kent Bundle, Atrioventricular Bundles, Accessory, Bypass Tract, Atrio-Hisian, Fasciculoventricular Pathways, Conducting Pathway, Accessory, Atrio Hisian Bypass Tract