title: [Mutual transformation theory of vectorcardiograms and its clinical use].
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000175:diagnosis; D004562:Electrocardiography; D005260:Female; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D006973:Hypertension / Q000175:diagnosis; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D014672:Vectorcardiography