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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).
What Is a Ventriculoperitoneal shunt (VP shunt)? A VP shunt is a surgical procedure which is done to relieve increased pressure cause by a fluid buildup on the brain, called hydrocephalus. The fluid around the brain and in the spinal column is calls cerebral spinal fluid (CSF).