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Therefore, a large left-to-right shunt through a patent ductus arteriosus (PDA) results in left atrial and left ventricular enlargement. The pulmonary veins and the ascending aorta can also be dilated with a sufficiently large patent ductus arteriosus (PDA).
We performed a percutaneous balloon atrial septostomy and a modified Potts shunt (13-mm graft from left pulmonary artery to descending aorta), with the aim of decompressing the hypertensive right ventricle (RV) by reducing left ventricular preload and left atrial hypertension. The procedures were uneventful. The patient's condition improved rapidly and biventricular function was restored. In contrast to a Potts shunt in other conditions, patients with pulmonary hypertension caused by left ventricular disease may benefit from an additional atrial left-to-right shunt.