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Presurgical assessment of flow variability in an azygos vein aneurysm using 4D-flow MRI

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Title: Presurgical assessment of flow variability in an azygos vein aneurysm using 4D-flow MRI
Authors: Takuya, Ikushima Browse this author
Hideki, Ujiie Browse this author
Satonori, Tsuneta Browse this author
Chiba, Ryohei Browse this author
Tabata, Yukiko Browse this author
Fujiwara-Kuroda, Aki Browse this author
Hida, Yasuhiro Browse this author →KAKEN DB
Kaga, Kichizo Browse this author →KAKEN DB
Wakasa, Satoru Browse this author →KAKEN DB
Kato, Tatsuya Browse this author
Keywords: 4D-flow MRI
Azygos vein aneurysm
Issue Date: Jul-2022
Publisher: Springer
Journal Title: General Thoracic and Cardiovascular Surgery
Volume: 70
Issue: 7
Start Page: 673
End Page: 676
Publisher DOI: 10.1007/s11748-022-01813-7
Abstract: Azygos vein aneurysm (AVA) is necessary to prevent pulmonary embolism due to the outflow of a thrombus or rupture of the aneurysm. However, there is no established modality to assess the properties of AVA. Time-resolved three-dimensional phase-contrast magnetic resonance imaging (4D-flow MRI) has been used to examine the hemodynamics in various fields. We report a case of AVA to evaluate the flow variability and adhesions of surrounding tissues using 4D-flow MRI. The findings of the study suggested aneurysm turbulence and the absence of thrombi. The cine image, which showed a sliding wall synchronized to the heartbeat, indicated no adhesion to the superior vena cava. Based on these results, the thoracoscopic approach was deemed possible preoperatively. Thoracoscopic AVA resection was performed, and the postoperative course was uneventful. This study documented the utility of 4D-flow MRI for a detailed evaluation of AVA.
Rights: This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at:
Type: article (author version)
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 加藤 達哉

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