title: Thyroid hormone and cortisol concentrations after congenital heart surgery in infants younger than 3 months of age.
abstract: OBJECTIVE
  To investigate associations between thyroid hormone and cortisol concentrations after cardiac surgery and postoperative intensive care course.
  
  
  METHODS
  Prospective observational study of 52 infants <3 months of age following congenital heart surgery.
  
  
  RESULTS
  Infants with low tri-iodothyronine (< or =3.7 pmol/l) or high cortisol concentration on postoperative admission to the paediatric intensive care unit (PICU) were more likely to have a high inotrope requirement on postoperative day 2 (p = 0.003 and p = 0.0006, respectively) or need mechanical ventilation for longer than 96 h (p = 0.04 and p = 0.002, respectively). Total cortisol concentration < 200 nmol/l was found in 16 (31%) infants. There was no association between low cortisol and postoperative complications.
  
  
  CONCLUSIONS
  Infants <3 months of age with low tri-iodothyronine or high cortisol concentration on PICU admission have a more complicated PICU course. Low cortisol concentration is common in the early postoperative period, but is not associated with postoperative complications.
authors.affiliation: Starship Children's Hospital, Park Road, Grafton, Private Bag 92024, Auckland, New Zealand. kplumpton@ausdoctors.net
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Plumpton
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Anderson
authors.forename: John
authors.initials: J
authors.lastname: Beca
mesh_terms: D002315:Cardiopulmonary Bypass; D005260:Female; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D007223:Infant; D008297:Male; D013963:Thyroid Hormones / Q000097:blood*
chemical_list: D013963:Thyroid Hormones; D006854:Hydrocortisone