Some authors measured the plasma MMP/TIMP levels and LV geometry in patients up to 6 months after MI, showing an increase by >150% of MMP9 from control (13 ± 3 ng/mL) at on day 1 after MI compared to control (47 ± 6 vs. 13 ± 3 ng/mL) and a further n increase by 35% in MMP9 levels from day 1 to day 5 after MI [11]. This evidence concerns the gene MMP9 and myocardial infarction.