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A study of the natural history of 51 adult patients with atrial septal defect with pulmonary hypertension (ASD + PH) was performed. ASD + PH of less than 14 Um2 of pulmonary artery resistance (PVR) was considered an indication for surgery. The prognosis of surgically treated patients was favorable, but that of medically treated patients was poor. For patients with ventricular septal defect with pulmonary hypertension (VSD + PH), surgery was considered for pulmonary-systemic vascular resistance ratio (Rp/Rs) less than 0.5, and for patients under than 10 years and, ideally, under 2 years of age.

Natural histories of atrial septal defect with pulmonary hypertension, and ventricular septal defect with pulmonary hypertension.