title: Authors' reply.
authors: Division of Pediatric Cardiology, University of Nebraska Medical Center and Children's Hospital and Medical Center, Omaha, Nebraska.
authors: Shelby
authors: S
authors: Kutty
authors: Division of Pediatric Cardiology, University of Nebraska Medical Center and Children's Hospital and Medical Center, Omaha, Nebraska.
authors: David A
authors: DA
authors: Danford
mesh_terms: D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D014463:Ultrasonography; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging*; D014683:Vena Cava, Superior / Q000000981:diagnostic imaging*