In this research, the analysis of the allelic distribution and the corresponding genotypes for Q192R and L55M of the PON1 polymorphisms showed an absence of risk due to these genetic factors for atherothrombotic CVD, similar to the ones found in other populations, even with a larger sample, for risk of coronary heart disease 18and cerebral infarction .19 This evidence concerns the gene PON1 and brain infarction.