title: The first derivative of the electrocardiogram and its diagnostic significance in ventricular hypertrophy.
mesh_terms: D000328:Adult; D001022:Aortic Valve Insufficiency / Q000175:diagnosis; D006332:Cardiomegaly / Q000175:diagnosis*; D004562:Electrocardiography; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006352:Heart Ventricles; D006801:Humans; D008433:Mathematics; D008944:Mitral Valve Insufficiency / Q000175:diagnosis; D008946:Mitral Valve Stenosis / Q000175:diagnosis