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After right heart catheterization (RHC), mean pulmonary artery pressure (mPAP) was 43\u2009mmHg and pulmonary vascular resistance (PVR) was 10.2 Wood units (WU). Arteriography revealed organized clots located at the proximal level of the right pulmonary artery, leading to a diagnosis of chronic thromboembolic pulmonary hypertension (CTEPH). The CTEPH team disqualified the patient from surgical treatment due to high perioperative risk and referred him for balloon pulmonary angioplasty (BPA) together with pulmonary hypertension\u2010specific pharmacotherapy (sildenafil). The patient underwent a cycle of nine BPA sessions and completed treatment without complications. Follow\u2010up showed sustained hemodynamic improvement in RHC (mPAP 23\u2009mmHg, PVR 2.6\u2009WU), improved physical capacity (WHO Class II), and relief of dyspnea symptoms.<\/jats:p>","DOI":"10.1002\/pul2.12064","type":"journal-article","created":{"date-parts":[[2022,3,21]],"date-time":"2022-03-21T09:10:04Z","timestamp":1647853804000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["An unusual case of CTEPH treated by BPA in a patient with a single lung after cancer surgery"],"prefix":"10.1002","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8298-9243","authenticated-orcid":false,"given":"Szymon","family":"Darocha","sequence":"first","affiliation":[{"name":"Department of Pulmonary Circulation, Thromboembolic Diseases and Cardiology, Centre of Postgraduate Medical Education Fryderyk Chopin Hospital in European Health Center Otwock Otwock 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