title: HORIZONTAL PLANE ELECTROCARDIOGRAPHIC VECTORS. A STUDY IN CONJUNCTION WITH FRONTAL PROJECTIONS.
mesh_terms: D006332:Cardiomegaly; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006801:Humans; D012106:Research; D014672:Vectorcardiography
keywords: DIAGNOSIS, DIFFERENTIAL; ELECTROCARDIOGRAPHY; HEART ENLARGEMENT