Circadian clock genes play a major role in hemostatic balance byregulating the fibrinolytic systems, and CLOCK and CRYgenes are directly involved in this activity (Ohkuraet al., 2006), and therefore increase the risk for CVD.A role of the circadian rhythm in cardiovascular function is firmly supported in allthose studies, but our study found the connection of myocardial infarction and some ofthe circadian rhythm genes SNPs. Here, CLOCK is linked to myocardial infarction.