Hemodynamics of a right ventricular outflow tract aneurysm assessed with 4D flow MRI before and after unilateral pulmonary artery balloon angioplasty: A case report

Hideharu Oka, MD, PhD; Kouichi Nakau, MD; Keita Ito, MD; Rina Imanishi, MD; Kazunori Fukao, RT; Sadahiro Nakagawa, RT, PhD; Tatsuya Suzuki, RT; Satoru Takahashi, MD, PhD

doi:10.1016/j.radcr.2025.04.083

Radiology Case Reports (Aug 2025)

Hemodynamics of a right ventricular outflow tract aneurysm assessed with 4D flow MRI before and after unilateral pulmonary artery balloon angioplasty: A case report

Hideharu Oka, MD, PhD,
Kouichi Nakau, MD,
Keita Ito, MD,
Rina Imanishi, MD,
Kazunori Fukao, RT,
Sadahiro Nakagawa, RT, PhD,
Tatsuya Suzuki, RT,
Satoru Takahashi, MD, PhD

Affiliations

Hideharu Oka, MD, PhD: Department of Pediatrics, Asahikawa Medical University, Hokkaido, Japan; Corresponding author.
Kouichi Nakau, MD: Department of Pediatrics, Asahikawa Medical University, Hokkaido, Japan
Keita Ito, MD: Department of Pediatrics, Asahikawa Medical University, Hokkaido, Japan
Rina Imanishi, MD: Department of Pediatrics, Asahikawa Medical University, Hokkaido, Japan
Kazunori Fukao, RT: Section of Radiological Technology, Department of Medical Technology, Asahikawa Medical University Hospital, Hokkaido, Japan
Sadahiro Nakagawa, RT, PhD: Section of Radiological Technology, Department of Medical Technology, Asahikawa Medical University Hospital, Hokkaido, Japan
Tatsuya Suzuki, RT: Section of Radiological Technology, Department of Medical Technology, Asahikawa Medical University Hospital, Hokkaido, Japan
Satoru Takahashi, MD, PhD: Department of Pediatrics, Asahikawa Medical University, Hokkaido, Japan

DOI: https://doi.org/10.1016/j.radcr.2025.04.083
Journal volume & issue: Vol. 20, no. 8
pp. 3789 – 3792

Abstract

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Right ventricular outflow tract aneurysms are rare postoperative complications associated with congenital heart diseases. The hemodynamics associated with a right ventricular outflow tract aneurysm serve as important risk indicators for aneurysm expansion and thrombus formation; however, they have not been thoroughly evaluated. A 3-year-old girl was diagnosed with Double-outlet right ventricle who underwent surgical correction with patch enlargement of the right ventricular outflow tract at 2.5 years. Postoperatively, a patch expansion mass was observed and 4D flow MRI showed vortex flow. Notably, vortex flow within the aneurysm persisted even after balloon dilation of the unilateral pulmonary artery. Evaluating blood flow in right ventricular outflow tract aneurysms is crucial for determining prognosis and guiding treatment strategies.

Published in Radiology Case Reports

ISSN: 1930-0433 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Medicine: Medicine (General): Medical physics. Medical radiology. Nuclear medicine
Website: https://www.sciencedirect.com/journal/radiology-case-reports

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