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[Thoracic aortic coarctation: MRI evaluation and follow-up]
R Papavero1, B Kastler, C Clair
1Laboratoire d'imagerie et d'ingénierie pour la santé, Université de Franche-Comté, Besançon, France. roger.papavero@ufc-chu.univ-fcomte.fr
Journal De Radiologie
|June 21, 2001
Summary
Magnetic Resonance Imaging (MRI) is a reliable non-invasive tool for diagnosing and evaluating thoracic aortic coarctation. It accurately assesses the severity of aortic coarctation and helps estimate trans-stenotic flow, especially when other methods are insufficient.
Area of Science:
- Cardiovascular Imaging
- Medical Diagnostics
- Radiology
Background:
- Thoracic aortic coarctation requires accurate diagnosis and monitoring.
- Non-invasive imaging plays a crucial role in managing this condition.
Purpose of the Study:
- To report experience with MRI for evaluating thoracic aortic coarctation.
- To describe MRI's utility in estimating trans-stenotic flow.
Main Methods:
- 43 MRI examinations were conducted on 30 patients (neonates to adults).
- MRI assessed the aorta and supra-aortic vessels.
- Correlation between MRI findings and Doppler US/angiography was analyzed.
Main Results:
- MRI visualized the thoracic aorta and supra-aortic vessels in 42/43 patients.
- Preoperative coarctation was identified in 11/12 cases.
- MRI detected postoperative restenosis and pseudo-coarctation.
- A significant correlation (r=0.72; p<0.01) was found between pressure gradient and signal void size.
Conclusions:
- MRI is a reliable non-invasive method for diagnosing aortic coarctation.
- MRI provides semi-quantitative evaluation of coarctation severity.
- MRI is particularly valuable when color Doppler ultrasound is unsatisfactory.