title: [Spatial magnitude of vector U-loop--studies of left branch block and left ventricular loading].
mesh_terms: D002037:Bundle-Branch Block / Q000503:physiopathology*; D006349:Heart Valve Diseases / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D014672:Vectorcardiography