title: The duration of systole in an electrocardiogram in normal humans and in patients with heart disease. 1920.
mesh_terms: D004562:Electrocardiography / Q000266:history*; D006331:Heart Diseases / Q000175:diagnosis / Q000266:history* / Q000503:physiopathology; D049673:History, 20th Century; D006801:Humans; D008955:Models, Cardiovascular; D012016:Reference Values; D013599:Systole / Q000502:physiology*