3D morphometric analysis of the arterial switch operation using in vivo MRI data
Hopewell N Ntsinjana1, Claudio Capelli, Giovanni Biglino
1Centre for Cardiovascular Imaging, Institute of Cardiovascular Science, University College London, London, United Kingdom; Cardiorespiratory Unit, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, United Kingdom.
Clinical Anatomy (New York, N.Y.)
|August 27, 2014
Summary
The arterial switch operation (ASO) for transposition of the great arteries (TGA) results in significant 3D anatomical differences in the aorta and pulmonary arteries. These geometric changes in ASO patients may impact long-term cardiovascular health.
Area of Science:
- Cardiovascular Surgery
- Medical Imaging
- Anatomical Modeling
Background:
- The arterial switch operation (ASO) is the standard surgical repair for transposition of the great arteries (TGA).
- Long-term outcomes after ASO may be influenced by residual morphological and geometrical abnormalities in the great arteries and coronary arteries.
- A comprehensive 3D analysis of these anatomical variations is lacking.
Purpose of the Study:
- To investigate and compare the three-dimensional (3D) morphological and geometrical characteristics of the aorta, pulmonary arteries, and coronary arteries in patients after ASO versus healthy controls.
- To identify potential long-term health implications of these anatomical differences.
Main Methods:
- Utilized 3D patient-specific anatomical models reconstructed from cardiovascular magnetic resonance (CMR) imaging.
- Compared 20 ASO patients (mean age 14.4 years) with age- and body surface area-matched healthy controls (mean age 15.2 years).
Main Results:
- ASO patients exhibited significant differences in aortic, pulmonary artery, and coronary artery morphology and geometry compared to controls.
- Specifically, ASO patients showed aortic root dilation and abnormal 3D angulation, including an acute angulation of the aortic arch curvature.
- These geometric alterations could potentially affect aortic blood flow and physiological stresses.
Conclusions:
- Post-ASO repair, significant 3D geometric alterations persist in the aorta and pulmonary arteries.
- These anatomical changes may predispose ASO patients to early atherosclerotic disease due to altered hemodynamic profiles.
- Further research is warranted to understand the clinical impact of these findings on long-term patient outcomes.
