title: Histopathological study on the conduction system in rheumatic valvular disease, using serial sectioning method.
mesh_terms: D004562:Electrocardiography; D006329:Heart Conduction System / Q000473:pathology*; D006349:Heart Valve Diseases / Q000473:pathology*; D006652:Histological Techniques; D006801:Humans; D008297:Male; D008875:Middle Aged; D012214:Rheumatic Heart Disease / Q000473:pathology* / Q000503:physiopathology