CPT® Code 33412

The procedure described by CPT® Code 33412 involves the replacement of the aortic valve along with the enlargement of the aortic annulus through a transventricular approach, specifically known as the Konno procedure. This surgical intervention is primarily indicated for patients suffering from aortic annular hypoplasia, which may occur with or without accompanying aortic valve disease. Aortic annular hypoplasia refers to an underdeveloped aortic annulus, which can lead to significant left ventricular outflow tract obstruction (LVOTO). The surgical approach typically requires a median sternotomy or an upper hemisternotomy to gain access to the heart. During the procedure, various cannulas are strategically placed to facilitate cardiopulmonary bypass and ensure adequate blood flow and oxygenation while the heart is temporarily stopped. The surgical steps include the enlargement of the aortic annulus and the left ventricular outflow tract, which are critical for alleviating the obstruction and restoring normal hemodynamics. The procedure culminates in the placement of a synthetic patch and the suturing of a prosthetic aortic valve, followed by the closure of the aorta and the chest incision. This complex surgical intervention is essential for improving the patient's cardiac function and overall quality of life.