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The hypoplastic left heart syndrome (HLHS) with a highly restrictive atrial septum (RAS) was shown by Color Doppler and 2-dimensional imaging. The initial echocardiogram showed a 2.2-mm atrial communication. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
