title: Electrocardiogram and vectorcardiogram of ostium secundum and ostium primum.
mesh_terms: D054087:Atrial Septum; D004562:Electrocardiography; D006343:Heart Septal Defects; D006346:Heart Septum / Q000002:abnormalities*; D006801:Humans; D014672:Vectorcardiography
keywords: ELECTROCARDIOGRAPHY; HEART SEPTUM/abnormalities; VECTORCARDIOGRAPHY