MMP-9 levels also vary between patients with acute myocardial infarction (AMI) and unstable angina pectoris (UAP); serum MMP-9 levels are higher in patients with ST segment elevation myocardial infarction (STEMI) than in those with non-STEMI (NSTEMI) or UAP [71]. The gene discussed is MMP9; the disease is acute myocardial infarction.