title: Electrocardiogram and vectorcardiogram of ostium secundum and ostium primum.
mesh_terms: D054087:Atrial Septum; D004562:Electrocardiography; D006330:Heart Defects, Congenital / Q000175:diagnosis*; D006801:Humans; D014672:Vectorcardiography
keywords: ELECTROCARDIOGRAPHY; HEART DEFECTS, CONGENITAL/diagnosis; VECTORCARDIOGRAPHY