title: The study of left ventricular function by M-mode echocardiography.
mesh_terms: D004452:Echocardiography; D005069:Evaluation Studies as Topic; D006331:Heart Diseases / Q000175:diagnosis* / Q000503:physiopathology; D006352:Heart Ventricles; D006801:Humans; D009200:Myocardial Contraction