title: A study in A-V conduction.
mesh_terms: D000328:Adult; D001283:Atrioventricular Node / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006349:Heart Valve Diseases / Q000503:physiopathology; D006801:Humans; D008943:Mitral Valve