title: Left axis deviation. Correlation between the orientation of the initial forces and the spatial velocity between the 27.5 and 30 msec vectors before the end of the QRS. A cooperative study.
mesh_terms: D006321:Heart / Q000503:physiopathology*; D006327:Heart Block / Q000503:physiopathology*; D006801:Humans; D014672:Vectorcardiography