Balloon pulmonary angioplasty (BPA) is an innovative treatment for chronic thromboembolic pulmonary hypertension (CTEPH). We retrospectively examined the clinical outcomes and complications of BPA at Yokohama City University Hospital (YCUH) between 2012 and 2018. In 2012, we began to conduct BPA sessions in 46 patients with inoperable CTEPH
34 completed the BPA scheme and the follow-up plan. A longitudinal sub-analysis was performed with cohorts 1 and 2 receiving BPA before and after April 2015. Significant improvements in the mean pulmonary arterial pressure, pulmonary vascular resistance, and other parameters were detected after BPA. The total rate of thoracic complications was 25%. Specifically, the increase in SaO