^*Department of Anesthesiology and Critical Care Medicine, Division of Cardiac Critical Care Medicine, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania

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

The authors declare that they have nothing to disclose.

Address Correspondence to: Joseph W. Rossano, Division of Cardiology, Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, 3401 Center Civic Blvd, Philadelphia, PA 19103. E-mail: [email protected]