[Left axis deviation--with special reference to problems in cardiac surgery].
D004562:Electrocardiography; D006327:Heart Block / Q000209:etiology / Q000503:physiopathology*; D006330:Heart Defects, Congenital / Q000503:physiopathology / Q000601:surgery; D006345:Heart Septal Defects, Ventricular / Q000601:surgery; D006801:Humans; D011183:Postoperative Complications / Q000503:physiopathology