Truncus arteriosus is a rare condition that occurs when the aorta, coronary arteries, and pulmonary artery all come out of one common trunk. The disorder may be very simple, or very complex. In all cases, it requires open-heart surgery to repair the defect.
Repair is usually done in the first few days or weeks of the infant’s life. The pulmonary arteries are separated from the aortic trunk, and any defects are patched. Usually, children also have a ventricular septal defect, and that is also closed. A connection is then placed between the right ventricle and the pulmonary arteries.
Most children need one or two more surgeries as they grow.