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| Applications of MRI in pediatric patients with secandum atrial septal defects |
| SUN Ai-min1, DING Wen-long2, ZHU Ming1, ZHONG Yu-min1, WANG Qian1 |
| 1. Department of Radiology, Shanghai Children’s Medical Center of Shanghai Jiaotong University, School of Medicine,Shanghai 200127, China; 2. Shanghai Jiaotong University, School of Medicine, Shanghai 200127, China |
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Abstract Objective: To evaluate the value of MRI in pediatric patients with secundum atrial septal defects(ASD). Methods: Twenty-one cases with secundum ASD (mean age 6.26 years; age range from 2 to 15 years) were evaluated by MRI including FIESTA, phase-contrast MRI and CE-MRA. Results: Of all the 21 cases with secundum ASD, 2 cases associated with partial anomalous pulmonary venous return, which was missed by transthoracic echocardiography(TTE) were detected by MRI. Nine cases underwent transcather closure of the ASD. Four had surgical repair. Measurements at PC-MRI of ASD size and septal rim distances to superior vena cava, inferior vena cava, tricuspid valve, right upper pulmonary vein in 4 cases agreed fairly well with surgical results. Measurements of defect sizes at phase-contrast MR had good agreement with measurements at TTE. The device size after closure of ASD in 9 cases was little larger than measurements at PC-MRI. Conclusion: MR imaging can enable determination of defect size, rim distances to adjacent structures, and anomalous pulmonary venous connections, which can provide some complementary information to TTE and even can be considered as an alternative diagnostic method to TTE before transcather closure of ASD.
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Received: 26 September 2008
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2009, Vol. 20 
