CPT® Code 33612

Repair of double outlet right ventricle with intraventricular tunnel repair; with repair of right ventricular outflow tract obstruction

The procedure described by CPT® Code 33612 involves the surgical repair of a double outlet right ventricle (DORV) with the use of an intraventricular tunnel repair, in conjunction with the correction of right ventricular outflow tract obstruction. DORV is a congenital heart defect characterized by both the aorta and pulmonary artery originating from the right ventricle, which can lead to significant hemodynamic complications. In this procedure, the surgeon creates an intraventricular tunnel, which serves as a conduit for blood flow from the left ventricle through a ventricular septal defect (VSD) to the aorta. This is crucial for ensuring adequate oxygenation of the blood, as the left ventricle typically supplies oxygen-rich blood to the body. The surgical approach begins with the establishment of cardiopulmonary bypass, allowing the heart to be temporarily stopped and providing a bloodless field for the operation. The right atrium is incised to gain access to the heart's internal structures, where the VSD is visualized and assessed in relation to the aorta. Depending on the size and position of the VSD, the surgeon may either approach it through the tricuspid valve or make an incision in the right ventricle. The creation of the tunnel involves careful dissection and suturing techniques to ensure that the new pathway for blood flow is both functional and anatomically correct. In addition to the tunnel repair, the procedure addresses any obstruction in the right ventricular outflow tract, which may occur due to the bulging of the tunnel. This is rectified by enlarging the right ventricle with an autologous pericardial patch, which is a piece of the patient's own pericardium used to reinforce the heart structure. The meticulous nature of this surgery requires a thorough understanding of cardiac anatomy and surgical techniques to achieve optimal outcomes for patients with this complex congenital condition.