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Growth characteristics of the aortic arch after the Norwood operation

William T. Mahle, MD^* , Jack Rychik, MD, FACC^* , Paul M. Weinberg, MD, FACC^* and Meryl S. Cohen, MD^*

^* Division of Cardiology, The Children’s Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA

View larger version (14K): [in a new window]   Figure 1 Plot of transverse arch diameter versus body surface area (BSA) for 50 patients with hypoplastic left heart syndrome after Norwood operation at the 1st (circles), 2nd (triangles) and 3rd (diamonds) echocardiographic studies. The solid line represents the regression line for a normal population (Snider et al. [3]). The hatched lines are the tolerance limits weighted for body surface area for prediction of normal values for 80% of the future population with 50% confidence.