MMP9 and myocardial infarction: In all cases of myocardial infarction, median serum levels of MMP-3 (stromelysin), MMP-9, PAPP-A, TIMP-1 were 14.11 pg/ml, 58.6 pg/ml, 1.3 μg/ml, 93.85 pg/ml respectively whereas the mean serum MCP-1 was 650.57 ± 625.42 pg/ml.