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| Applications of cardiac MRI after repair of congenital heart disease |
| SUN Ai-min, ZHU Ming, ZHONG Yu-min, WANG Qian |
| Department of Radiology, Shanghai Children’s Medical Center of Shanghai Jiaotong University,School of Medicine, Shanghai 200127, China |
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Abstract Objective: To evaluate the value of MRI in the follow-up of patients with repaired congenital heart disease. Methods: Ninty-six cases with repaired congenital heart disease(mean age 5.71 years; age range 5 days to 24 years) were evaluated by cardiac MRI including FIESTA, double IR, phase-constrast cine imaging and CE-MRA. Thirty-two of the 96 cases underwent corrected repair and 64 had palliated operation. Results: Of the 96 cases, 21 residual excardiac anomalies and anastomosis narrowing, which was missed or not clearly visualized by echocardiography, was detected by MRI. Dilated azygos vein with retrograde flow was found in 5 of 23 cases after bidirectional Glenn operation. In 2 of 5 cases with Fontan operation, hemdynamics measured by PC-MR showed the similar physiology as that of post-Glenn surgery. Varied amount of pulmonary regurgitation occurred in all of the 5 cases with corrected TOF repair. Of the 7 cases after repaired TAPVC, 3 cases with residual pulmonary vein stenosis was found. Decreased systolic velocity and reversed flow during diastolic phase in the ipsilateral branch pulmonary artery with branch pulmonary vein stenosis was measured by PC-MRI in 1 case. Conclusion: MRI can provide high resolution, high contrast, and anatomical images in freely selectable 2D planes. Anatomical images, combined with the functional information provided by cine, velocity-mapping techniques make MRI ideally suited to the evaluation of congenital heart disease in patients after operation.
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Received: 27 September 2007
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2008, Vol. 19 
