Chronic thromboembolic pulmonary hypertension (CTEPH) is a serious lung condition that can arise after an individual suffers a pulmonary embolism. The condition can lead to a buildup of tissue in the lungs that often leads to high blood pressure, heart strain and eventual heart failure. Luckily for patients, there is a surgery available that can treat CTEPH without a full lung transplant. Heart surgeon Dr. Craig Selzman explains the steps involved in the six-hour “roto-rooter operation.”