title: Vectorcardiographic aspects of primary myocardial disease in 50 patients.
mesh_terms: D000328:Adult; D006332:Cardiomegaly / Q000175:diagnosis; D009202:Cardiomyopathies / Q000175:diagnosis*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014672:Vectorcardiography