Ventricular pre-excitation.
D001283:Atrioventricular Node / Q000187:drug effects / Q000503:physiopathology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D014927:Wolff-Parkinson-White Syndrome / Q000188:drug therapy / Q000503:physiopathology*