title: Sydney Ringer and the origins of cardioplegia.
mesh_terms: D000818:Animals; D006348:Cardiac Surgical Procedures / Q000266:history; D004285:Dogs; D004739:England; D006324:Heart Arrest, Induced / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007552:Isotonic Solutions / Q000266:history; D000077331:Ringer's Solution
chemical_list: D007552:Isotonic Solutions; D000077331:Ringer's Solution