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BACKGROUND: The presence of gene polymorphisms in the renin-angiotensin-aldosterone system associated with an impaired endothelial function that causes atherosclerosis and also myocardial fibrosis such as the polymorphism of the angiotensin-converting enzyme gene and the angiotensin I receptor (AT1R) gene.&#x0D;AIM: This research was aimed to explore the role of AT1R A1166C gene polymorphism in the incidence of coronary slow flow phenomenon (CSFP) in the Malay population, South Sumatra, Indonesia.&#x0D;METHODS: This study is a comparative analysis using a case-control study design to analyze the effect of the AT1R A1166C gene polymorphism on the incidence of slow flow phenomenon in patients undergoing elective coronary angiography at Mohammad Hoesin Hospital Palembang, Indonesia. Examination of AT1R gene polymorphism was carried out with several steps starting from deoxyribonucleic acid extraction, polymerase chain reaction process, followed by restriction fragment length polymorphism stages with Ddel restriction enzymes and visualization.&#x0D;RESULTS: Thirty-two patients participated in these study-baseline characteristics between homogeneous coronary regular flow groups and homogeneous coronary slow flow groups. There is no difference between genotype distribution, allele frequency, and genotype between the CSFP and the coronary standard flow group.&#x0D;CONCLUSION: There is no influence of AT1R A1166C gene polymorphism on the CSFP in patients undergoing coronary angiography.

The Role of AT1R A1166C Gene Polymorphism in Coronary Slow Flow Phenomenon of Undergoing Coronary Angiography Patients