Accessory atrioventricular connections.
D006329:Heart Conduction System / Q000002:abnormalities* / Q000503:physiopathology; D006330:Heart Defects, Congenital / Q000145:classification / Q000503:physiopathology; D006801:Humans; D009626:Terminology as Topic; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology