Objective: To determine whether serum troponin I (TnI), measured 4 hours after surgery for congenital heart disease, is a predictor of myocardial dysfunction and low cardiac output syndrome (LCOS).
Design: Prospective, observational study.
Setting: Paediatric intensive care unit in a tertiary care academic children's hospital, 1 June 2003 to 12 May 2004.