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Uptodate Reference Title
Electrocardiography of a six-year-old patient with a large secundum atrial septal defect
Electrocardiography of a six-year-old patient with a large secundum atrial septal defect
Electrocardiogram of a large secundum atrial septal defect in a six-year-old. Note the right ventricular hypertrophy and rSR' pattern in lead V1 commonly seen with large secundum atrial septal defects.