NOS3 and ST Elevation Myocardial Infarction: Materials and methods: NOS3 (rs1799983) and DDAH2 (rs805305) single nucleotide polymorphisms (SNPs) were analyzed in 148 ST-elevation myocardial infarction (STEMI) patients and 75 healthy subjects (control) using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).