in the CHD group and cyanotic CHD when compared to controls (0.0174 vs. 0.0138) and acyanotic (0.0255 vs. 0.0154), both were not statistically significant (p >0.05). The use of troponin-T may be useful in follow-up of unoperated cases of CHD for early identification of myocardial injury. We recommend further studies with larger sample size and serial measurement of troponin-T levels to establish the role of troponin-T as a marker of myocardial injury in children with unoperated CHD.