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