We want to do a study comparing the TGC in 10 newborns without a heart defect to the TGC in 10 newborns with a congenital heart defect. To do this we will need one sample of blood. the sample we need is 3 cc which is a little more than 1/2 teaspoon. The blood sample for both groups is to be taken from the intravenous catheter (IV) the child will have placed for surgery. The newborns without a heart defect will be children having surgery for a non-cardiac problem.