BACKGROUND: The role of coronary artery spasm (CAS) was extended beyond variant angina to ischemic heart disease in general, including effort angina, unstable angina, acute myocardial infarction (MI) and sudden death. It is difficult and cumbersome to examine CAS during coronary angiography. Risk factors for CAS include smoking and genetic polymorphisms. AIM: We aimed to investigate the association of the interleukin-6 (IL-6) polymorphism with catheter-induced CAS in Egyptian patients who undergo coronary angiography. METHODS: This is a case-control study. Two hundred patients with chronic coronary artery disease who underwent elective coronary angiography were included in the study. Patients were divided into two groups: the non-CAS group (100 patients) and the CAS group (100 patients). The subjects were genotyped to the -572 C>G (rs 1800796) polymorphism of the IL-6 gene by PCR-restriction fragment length polymorphism. RESULTS: We found that patients with CAS have more risk factors for atherosclerosis compared to those without CAS. Smoking, the IL-6 GG genotype, and the G allele were independent risk factors for CAS. CONCLUSION: We concluded that the GG genotype and G allele of the IL-6 gene are associated with CAS. Smoking, the GG genotype, and the G allele of the IL-6 gene are independent predictors of catheter-induced CAS.
Coronary Angiography , Coronary Vasospasm , Genetic Predisposition to Disease , Interleukin-6 , North African People , Smoking , Humans , Egypt/epidemiology , Male , Female , Middle Aged , Interleukin-6/genetics , Coronary Vasospasm/genetics , Coronary Vasospasm/diagnosis , Coronary Vasospasm/epidemiology , Case-Control Studies , Risk Factors , Smoking/adverse effects , Smoking/epidemiology , Aged , Cardiac Catheterization , Gene Frequency , Phenotype , Cardiac Catheters , Genetic Association Studies , Polymorphism, Single Nucleotide , Polymorphism, Genetic
BACKGROUND: Nitric oxide (NO) exerts diverse effects on the cardiovascular system. Impairment of NO production plays a key role in cerebral and coronary artery spasm. We aimed to explore the predicting factors of radial artery spasm (RAS) and the association of eNOS gene polymorphism (Glu298Asp) with RAS during cardiac catheterization. METHODS AND RESULTS: 200 patients underwent elective coronary angiography through a trans-radial approach. The subjects were genotyped to the Glu298Asp polymorphism (rs1799983) on the eNOS gene by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Our results showed that the subjects with the TT genotype and T allele were significantly more likely to develop radial artery spasms (OR = 12.5, 4.6, P < 0.001 respectively). TT genotype of eNOS Glu298Asp polymorphism, number of punctures, size of the radial sheath, radial tortuosity, and right radial access are independent predictors of radial spasm. CONCLUSION: The eNOS (Glu298Asp) gene polymorphism is associated with RAS during cardiac catheterization in Egyptians. TT genotype of eNOS Glu298Asp polymorphism, number of punctures, size of the radial sheath, right radial access, and tortuosity are independent predictors of RAS during cardiac catheterization.
Arterial Occlusive Diseases , Cardiac Catheterization , Nitric Oxide Synthase Type III , Radial Artery , Humans , Arterial Occlusive Diseases/etiology , Arterial Occlusive Diseases/genetics , Cardiac Catheterization/adverse effects , Cardiac Catheterization/methods , Catheterization, Peripheral/adverse effects , Genotype , Nitric Oxide/metabolism , Nitric Oxide Synthase Type III/genetics , Polymorphism, Genetic , Risk Factors
