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contentuptodate· Content· item f13_28_13761
©2013 UpToDate ® Print Email Two-dimensional echocardiograms of atrioventricular canal defect Two-dimensional, four-chamber view of (A) balanced and (B) unbalanced complete atrioventricular (AV) canal defect. (A) Balanced AV canal defect with large atrial (*) and ventricular (**) components separated by common atrioventricular valve (arrow). (B) Unbalanced AV canal defect with right ventricular dominance, and hypoplastic left atrium and left ventricle. RA: right atrium; RV: right ventricle; LA: left atrium; LV: left ventricle; S: superior; I: inferior; R: right; L: left.