title: [Vectorcardiographic changes (Frank system) following surgical correction of atrial septal defect of the secundum type].
mesh_terms: D000293:Adolescent; D000328:Adult; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D013997:Time Factors; D014672:Vectorcardiography