title: Exercise and the electrocardiogram. the electromechanical S-wave: new hypotheses.
mesh_terms: D000787:Angina Pectoris / Q000503:physiopathology; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000503:physiopathology; D008954:Models, Biological; D009200:Myocardial Contraction; D005082:Physical Exertion