TF and acute myocardial infarction: Meanwhile, data on the prognostic value of TF activity or TF suggested that systemic TF activity had a harmful prognostic value in patients with AMI from a prospective study recruited 174 patients with unstable angina pectoris and 112 patients with acute myocardial infarction followed for a mean period of 3.26 years [35], and from a prognostic study with 1146 patients stable angina pectoris and 523 patients with acute coronary syndrome followed over a mean period of 2.3 years [34].