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Pulmonary artery-pulmonary artery collaterals in chronic thromboembolic pulmonary hypertension
  1. Sugang Gong,
  2. Huiting Li,
  3. Lan Wang
  1. Department of Cardio-Pulmonary Circulation, Tongji University Affiliated Shanghai Pulmonary Hospital, Shanghai, China
  1. Correspondence to Dr Lan Wang, Dept of Cardio-Pulmonary Circulation, Tongji University Affiliated Shanghai Pulmonary Hospital, Shanghai, China; wanglan198212{at}

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A 66-year-old woman was diagnosed with chronic thromboembolic pulmonary hypertension (CTEPH), with selective angiography revealing direct collaterals between the A9 and A10 pulmonary artery branches (figure 1A, figure 2 and figure 3A; online supplemental Video 1 and online supplemental Video 2). Balloon pulmonary angioplasty (BPA) of A9 revealed pronounced stenosis and lumen irregularities. Peripheral branches of A9, adjacent to A10, demonstrated compromised perfusion, as indicated in figure 1B. The subsequent BPA intervention on the A9 main branch involved a 3 mm balloon inflated to a pressure of 12 mm Hg for a duration of 5 s, repeated twice (figure 1C). Post-intervention angiography painted an optimistic picture: enhanced perfusion of the A9 branch and the …

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  • Contributors SG led the writing of the article and provided essential clinical insights from the patient treatments. HL was responsible for the thorough collection of data. LW played a vital role in conceptualising the case study and made significant contributions to the final revisions of the article.

  • Funding The study was supported in part by the Shanghai Pulmonary Hospital Institutional Clinical Research Project (Grant number: FKLY20005), and the Shanghai Pujiang Program (Grant number: 2021PJD060).

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.