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KMID : 0371619880040010083
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Journal of Wonkwang Medical Science
1988 Volume.4 No. 1 p.83 ~ p.89
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Non-invasive Echocardiographic Assessment of Left to Right Shunt Volume in children with Congenital Heart Disease
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Kim Tae-Up
Yoon Hyang-Suk
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Abstract
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Two-dimentional echocardiogram was performed in 51 children with isolated ventricular septal defect(VSD) and patent ductus arteriosus(PDA) undergoing cardiac catheterization. The magnitude of the left to right shunt was expressed as the pulmonary to systemic flow ratio (Q_p/Q_s) and was compared to a ratio of the echocardiographic left atrial diameter(LAD) to the aortic root diameter(AoD). The Q_p /Q_s was also compared to LAD/m2. Twenty-seven normal infants and children served as controls. The results are as followes : 1. The LAD/m2 and LAD/AoD were significantly larger in normal infants under one year of age than in children above one year 2. In 27 children with isolated VSD, relatively good linear relationship was found between Q_p/Q_s and the LAD/AoD (Q_p/Q_s = 1.66·LAD/AoD-0.51, r = 0.62) 3. In 24 patients with PDA, there was no relationship shown as isolated VSD. Conclusion : The LAD/AoD measurement appears to be helpful in the noninvasive assessment of the left-to-right shunt in patients with isolated VSD, but not in PDA.
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