title: Vectorcardiographic study of initial QRS forces in left bundle branch block associated with myocardial infarction, primary myocardial disease and valvular heart disease.
mesh_terms: D000328:Adult; D000368:Aged; D000790:Angiocardiography; D002037:Bundle-Branch Block / Q000503:physiopathology*; D009202:Cardiomyopathies / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006322:Heart Aneurysm / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology; D006349:Heart Valve Diseases / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000503:physiopathology*; D014672:Vectorcardiography / Q000379:methods*