Moreover it was also found that the levels of cTnT and myocardial enzymes were significantly different between the children with mild, moderate and severe hypoxia in the severe pneumonia group; the severer the condition of hypoxia, the higher the level of cTnT and myocardial enzymes; the partial pressure of blood oxygen of the children with severe pneumonia was in a negative correlations with cTnT and myocardial enzymes. This evidence concerns the gene TNNT2 and susceptibility to pneumonia measurement.