Right Ventricular Outflow Tract Obstruction after Bilateral Lung Transplantation

We report here on the successful treatment for right ventricular outflow tract obstruction after bilateral lung transplantation in a patient with primary pulmonary hypertension. A 31-year-old female patient with primary pulmonary hypertension underwent successful bilateral lung transplantation. She had a pressure gradient of 30 mmHg through the right ventricular outflow tract one week after transplantation, but was successfully treated with atelenol and disopyramide. Long-term follow-up cardiac catheterization did not show any significant right ventricular outflow tract obstruction. The actual cause of the right ventricular Outflow tract obstruction remained unknown, but long-standing Pulmonary hypertension might have induced significant structural changes in the heart, such as right ventricular hypertrophy and enlargement.