The level of IL-1β in the pericardial fluid in the anterior MI group (10.54 ± 5.17 pg/ml) was significantly higher than that in both the group with no previous MI (5.96 ± 3.68 pg/ml) and the posterior/inferior MI group (6.08 ± 4.10 pg/ml) (p = 0.008 and p = 0.005, respectively) (Fig. 2A). The gene discussed is IL1B; the disease is myocardial infarction.