Atrioventricular nodal Wenckebach phenomenon.
D001283:Atrioventricular Node / Q000503:physiopathology*; D004562:Electrocardiography; D005246:Feedback; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans