title: An early sign of right ventricular enlargement.
mesh_terms: D001344:Autopsy; D006332:Cardiomegaly / Q000175:diagnosis*; D004562:Electrocardiography; D006352:Heart Ventricles / Q000033:anatomy & histology; D006801:Humans; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D009929:Organ Size; D011656:Pulmonary Emphysema / Q000175:diagnosis; D011660:Pulmonary Heart Disease / Q000175:diagnosis