Production of chronic atrioventricular block in dogs without thoracotomy.
D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D005557:Formaldehyde / Q000633:toxicity*; D006327:Heart Block / Q000139:chemically induced*; D006329:Heart Conduction System / Q000187:drug effects*
D005557:Formaldehyde