title: Non-thyroidal illness syndrome and cardiopulmonary bypass in children with congenital heart disease.
abstract: BACKGROUND
  The thyroid hormones influence on all metabolic pathways. After heart surgery using cardiopulmonary bypass (CPB), serum T3 decreases and remains low for at least 24 hours. Several studies on pediatric have reported reduction of thyroid hormones after heart surgery. This study aimed to investigate the status of thyroid function tests in children with CPB surgery.
  
  
  METHODS
  This study was carried out based on the available data on 132 children aged less than 15 years suffering from CHD. The patients underwent open heart surgery in Rajaie Center in Iran from January to November 2010. The thyroid hormone levels were measured shortly after admission, and postoperatively in Intensive Care Unit (ICU) and thereafter at 12, 24 and 48-hour intervals. The patients' gender, age, weight, body mass index, heart disease details, previous cardiac surgeries, and cardiac surgery-related data such as pump time, aortic clamping time, hypothermia duration, postoperative hemodynamic status and postoperative use of inotropic drugs were recorded and analyzed Results: All patients showed a decrease in T3, T4 and TSH and an increase in T3-resin uptake after surgery. Eventually, 3 (3.2%) patients died. Preoperatively, there was a significant association between the reduction in the thyroid hormone levels and inotropic drugs as well as the type of the heart disease (p<0.05).
  
  
  CONCLUSIONS
  There is an association between post-operative inotropic drugs administration and reduction thyroid hormones levels in patients undergoing congenital heart disease cardiopulmonary bypass surgery.
authors.affiliation: Non-Communicable Pediatric Diseases Research Center, Babol University of Medical Sciences, Babol, Iran.
authors.forename: Kazem
authors.initials: K
authors.lastname: Babazadeh
authors.affiliation: Heart Valve Disease Research Center, Rajaie Cardiovascular Medical Research Center, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Avisa
authors.initials: A
authors.lastname: Tabib
authors.affiliation: Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Peyman
authors.initials: P
authors.lastname: Eshraghi
authors.affiliation: Heart Valve Disease Research Center, Rajaie Cardiovascular Medical Research Center, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Hooman
authors.initials: H
authors.lastname: Bakhshandeh
authors.affiliation: Non-Communicable Pediatric Diseases Research Center, Babol University of Medical Sciences, Babol, Iran.
authors.forename: Hassan
authors.initials: H
authors.lastname: Zamani
keywords: Cardiopulmonary bypass; Cyanosis; Inotropic drugs; Non-thyroidal Illness Syndrome