title: An abnormally superior vector. (Formerly called marked left axis deviation).
mesh_terms: D002037:Bundle-Branch Block / Q000503:physiopathology; D004699:Endocardium / Q000002:abnormalities; D006327:Heart Block / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology; D006330:Heart Defects, Congenital / Q000503:physiopathology; D006331:Heart Diseases / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D006984:Hypertrophy; D008171:Lung Diseases / Q000503:physiopathology; D014672:Vectorcardiography