title: Left axis deviation.
abstract: Left axis deviation is one of the most commonly encountered ECG abnormalities. Its presence should alert medical directors and underwriters to the possibility of underlying structural heart disease. Many of the causes of left axis deviation are apparent from the clinical findings. Left anterior fascicular block is one of the commonest causes of left axis deviation and has specific ECG criteria for its diagnosis.
authors.affiliation: Division of Cardiology, Toronto General Hospital. rossmackenzieconsulting@msn.com
authors.forename: Ross
authors.initials: R
authors.lastname: MacKenzie
mesh_terms: D000328:Adult; D002037:Bundle-Branch Block / Q000175:diagnosis*; D004562:Electrocardiography; D006330:Heart Defects, Congenital; D006801:Humans; D008297:Male; D009864:Ontario; D020379:Risk Adjustment