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September 17, 2026Obstetric MedicineOpen Access

Neo-Aortic Root Dilation in Pregnancy After Arterial Switch for Complete Transposition of the Great Arteries

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Key result

Beta-blocker therapy supports two complication-free pregnancies in a patient with neo-aortic dilation post-arterial switch.

  • n=1

Population

1 30-year-old woman with neo-aortic dilation during pregnancy after arterial switch operation for…

Design

Case_report

Follow-up

Through two pregnancies

Authors

AMAriane Hébert MétellusFMFrançois‐Pierre MongeonDHDoan Hoa

Discussion

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Overview

May support beta-blocker monitoring in moderate neo-aortic dilation post-ASO pregnancy; leaves open dissection risk and optimal thresholds.

Key Points

  • To evaluate the clinical trajectory, measurement challenges, and management strategies for neo-aortic root dilation during pregnancy in a woman with repaired complete transposition of the great arteries.
  • Monitored serial neo-aortic root dimensions across two consecutive pregnancies in a 30-year-old woman (G6P0A5) who previously underwent an arterial switch operation.
  • Utilized expert cardiovascular imaging review to resolve asymmetric neo-aortic measurement discrepancies alongside beta-blocker medical therapy.
  • Neo-aortic root diameter remained stable at 44 mm during the first pregnancy and 43 mm in the subsequent pregnancy following expert re-evaluation of an initial 47 mm measurement.
  • Both pregnancies concluded with uncomplicated deliveries under beta-blocker therapy, with no observed aortic dissection or progressive root enlargement exceeding 2 mm.

Study Design

Type

Case Report (n=1)

Structured PICO

P
Population
A 30-year-old pregnant woman with neo-aortic dilation after an arterial switch operation for D-transposition of the great arteries.
E
Exposure
Beta-blocker therapy and trimester-based surveillance
O
Outcome
Neo-aortic dilation stability and pregnancy complications

Pregnancy in women with neo-aortic dilation after arterial switch operation can be managed safely with beta-blockers and standardized surveillance.

Cite This Study

Métellus et al. (2026) conducted a case report in Neo-aortic dilation in pregnancy after arterial switch operation for D-transposition of the great arteries (n=1). Pregnancy with neo-aortic dilation was evaluated on Pregnancy complications and neo-aortic dissection. A 30-year-old pregnant woman with neo-aortic dilation post-arterial switch operation successfully completed two pregnancies without complications or dissection while on beta-blocker therapy.

synapsesocial.com/papers/6aabb7155f706d05830e5eadhttps://doi.org/10.1177/1753495x261484223
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 11-009 Neo-aortic dimensions after arterial switch operation, over time, in transposition of the great arteries patients2025
  2. 2Pregnancy Outcomes in Women With Transposition of the Great Arteries After an Arterial Switch Operation2018 · 22 citations
  3. 3Pulmonary, aorta, and coronary arteries post-arterial switch in transposition of great arteries: intermediate-term surveillance utilizing conventional echocardiography and cardiac multislice computed tomography2024 · 2 citations
  4. 4Valve-Sparing Neo-Aortic Root Replacement for Neo-Aortic Root Dilatation 20 Years after Arterial Switch Operation for Transposition of the Great Arteries: A Case Report2023
  5. 5Transposition of the great arteries: Fetal pulmonary valve growth and postoperative neo‐aortic root dilatation2019 · 4 citations