Balloon Pulmonary Angioplasty as a Treatment in Chronic Thromboembolic Pulmonary Hypertension: Past, Present, and Future.

Chronic thromboembolic pulmonary hypertension (CTEPH) is a major cause of precapillary pulmonary hypertension leading to right heart failure and death if left untreated. In addition to pulmonary endarterectomy, which is considered the standard of care, and specific drug therapy that is not however expected to offer relief from the mechanical component of the disease, the therapeutic options for CTEPH have expanded with the development of balloon pulmonary angioplasty (BPA). The purpose of this review is a better understanding and evaluation of BPA as a treatment option in CTEPH patients. With the evolution of BPA almost all over the world, more centers outside Japan, which remains the leader for the technique, presented their results confirming the efficacy, safety, and feasibility of this procedure as a complementary strategy in the treatment algorithm of CTEPH. Summarizing, more data from all over the world confirm that BPA is a challenging but potentially effective intervention for the treatment of inoperable CTEPH patients. However, there is a need for standardization of the technique, and furthermore, large, international, multicenter randomized controlled trials comparing BPA with the other treatment modalities of CTEPH are imperative.