Key result
Four-dimensional flow MRI successfully visualized complex flow patterns, revealing pulmonary artery asymmetry with diastolic retrograde flow and increased flow to supraaortic vessels.
Case Report (n=1)
4D flow MRI can noninvasively visualize complex hemodynamics and flow patterns in congenital heart disease patients post-surgery.
Supports noninvasive post-surgical flow assessment in d-TGA; hypothesis-generating and leaves open routine clinical adoption.
Recent advances in flow-sensitive magnetic resonance imaging (MRI) and data analysis allow for comprehensive noninvasive three-dimensional (3D) visualization of complex blood flow. Electrocardiogram (ECG)-gated three-directional (3dir) flow measurements were employed to assess and visualize time-resolved 3D blood flow in the pulmonary arteries (PA) and thoracic aorta. We present findings in a juvenile patient with surgically corrected transposition of the great arteries (d-TGA) and aortic coarctation. For the first time, the complex flow patterns in the PA following d-TGA were visualized. Morphologically, a slight asymmetry of the PA was found, with considerable impact on vascular hemodynamics, resulting in diastolic retrograde flow in the larger vessel and diastolic filling of the smaller PA. Additionally, increased flow to the supraaortic vessels was found due to aortic coarctation.
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Ley‐Zaporozhan et al. (2009) conducted a case report in Surgically corrected transposition of the great arteries (d-TGA) and aortic coarctation (n=1). Four-dimensional flow magnetic resonance imaging was evaluated on Visualization of complex blood flow in the pulmonary arteries and thoracic aorta. Four-dimensional flow MRI successfully visualized complex flow patterns, revealing pulmonary artery asymmetry with diastolic retrograde flow and increased flow to supraaortic vessels.
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