Balloon pulmonary angioplasty: Evolution over time and its complications Balloon pulmonary angioplasty (BPA) has grown from its beginnings as an indication for patients with chronic thromboembolic pulmonary hypertension (CTEPH) to being currently a class 1 indication for inoperable patients and/or residual CTEPH. Current evidence on this topic is underpowered, as most reports are based on…