title: [Study of curves of QRS loop plane ratio using a digital computer--with special reference to the normal subjects and patients with myocardial infarction].
mesh_terms: D009202:Cardiomyopathies / Q000503:physiopathology; D003201:Computers; D006327:Heart Block / Q000503:physiopathology; D006801:Humans; D009203:Myocardial Infarction / Q000503:physiopathology*; D014672:Vectorcardiography; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology