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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2025, Vol. 22 ›› Issue (02): 120-130. doi: 10.3877/cma.j.issn.1672-6448.2025.02.005

• Obstetric and Gynecologic Ultrasound • Previous Articles    

Evaluation of cardiac morphology and function in fetuses with simple complete transposition of the great arteries using fetal heart quantification:a preliminary study

Tingting Shen1,2, Bowen Zhao1,(), Mei Pan1, Xiaohui Peng1, Ran Chen1, Yuanshi Tian1, Mingxuan Zhang1   

  1. 1. Department of Diagnostic Ultrasound &Echocardiography,Sir Run Run Shaw Hospital,Zhejiang University College of Medicine,Technical Guidance Center for Fetal Echocardiography of Zhejiang Province & Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University,Hangzhou 310016,China
    2. Department of Special Inspection,Shaoxing Seventh People's Hospital,Shaoxing 312000,China
  • Received:2024-12-22 Online:2025-02-01 Published:2025-04-01
  • Contact: Bowen Zhao

Abstract:

Objective

To assess the value of fetal heart quantiflcation (fetal HQ) in evaluating heart morphology and function in fetuses with simple complete transposition of the great arteries (D-TGA).

Methods

Thirty-one fetuses with simple D-TGA (D-TGA group) diagnosed by fetal echocardiography who visited Sir Run Run Shaw Hospital, Zhejiang University School of Medicine from May 2020 to December 2023 were retrospectively analyzed, and 171 normal fetuses with matched gestational weeks were used as controls (control group).Fetal standard 4-chamber views (4CV) were collected, and fetal HQ software was applied to measure end diastolic basal apical length, transverse width, and area, and calculate the global spherical index (GSI).Measurements of left and right ventricular functional changes were also performed,including left ventricular ejection fraction (EF), and left and right ventricular fraction area change (FAC).Left and right ventricular end-diastolic areas were analyzed by speckle tracking imaging (STI), and longitudinal diameter and 24-segment end-diastolic diameter (ED), spherical index (SI), fractional shortening (FS),and global longitudinal strain (GLS) of the left and right ventricles were analyzed by STI.The great artery parameters of the fetuses in both groups were analyzed, including aortic diameter (AO), pulmonary artery diameter (PA), main pulmonary artery diameter (MPA), and their Z-scores.

Results

The differences in GSI, left and right ventricular FAC, left and right ventricular GLS, left ventricular end-diastolic area, and left ventricular length were signiflcant between the D-TGA group and the control group (all P<0.05).There were statistically signiflcant differences in ED of left ventricular segments 20-24 ED and right ventricular segments 8-24 (all P<0.05), in FS of left ventricular segments 20-24 and right ventricular segments (all P<0.05).and in SI of left ventricular segments 1-4, 10-17, and 19, and right ventricular segments 1-9 (all P<0.05)between the two groups.The difference between fetal AO Z-score and PA Z-score in the D-TGA group was statistically significant (1.32±0.70 vs -0.22±1.09, P<0.05).

Conclusion

Quantitative assessment of fetal cardiac morphology and function using the fetal HQ technique provides a reference basis for analyzing ventricular remodeling in D-TGA fetuses.

Key words: Ultrasonography, prenatal, Fetal, Heart quantiflcation, Complete transposition of the great arteries, Ventricular remodeling, Z-score

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