CD4 and myocardial infarction: Four immunophenotypes in the maturation stages of T-cell panel were associated with the occurrence of MI, of which 3, i.e., Terminally differentiated CD4 + T cell Count, Terminally differentiated CD8 + T cell, CD45RA on naive CD4 + T cell, were correlated positively with the occurrence of MI, and the only one, named Effector Memory CD4 − CD8 − T cell %T cell, was negatively related to the incidence of MI.