INFLUENCE OF RISK FACTORS AND POLYMORPHISM OF CASQ2 GENE ON DEVELOPMENT OF ATRIAL FIBRILLATION IN COMBINATION WITH SICK SINUS NODE SYNDROME
The aim of the study was to evaluate the influence of risk factors on the development of a combination of atrial fibrillation and sick sinus node syndrome and to determine the relationship of these cardiac arrhythmias to the polymorphism of the CASQ2 gene. The study included 95 patients, mean age 61.1 ± 14.3 years; Of them men - 48 (50.5%), with AF - 38 (40.0%), SSS - 17 (17.9%) and their combination - 40 (42.1%). Patients are divided into 3 groups, depending on the type of heart rhythm disturbance. The analysis of polymorphism rs6684209 of the gene of calsequestrin CASQ2 in all patients by the method of analysis of restriction fragment length polymorphism was performed. The size of the left atrium, ejection fraction, the presence of chronic heart failure (CHF), the presence of dyslipidemia, the increased body mass index (BMI), myocardial hypertrophy of the left ventricle were evaluated as factors influencing the development of the tachy-brady syndrome. It was revealed that all patients in the first group had CHF (y = 4.44, p = 0.03, x = 4.88, p = 0.02), and patients with CHF FC II significantly prevailed. Dyslipidemia in patients with a combination of two types of heart rhythm disturbances is much more common (x = 6.24, p = 0.01) than in patients with only AF. The BMI was significantly different in the first and third groups (t = 2.1, CC = 55, p = 0.03). Analysis of the frequency distribution ofgenotypes of the CASQ2 gene and alleles did not reveal the presence of statistically significant differences between the groups studied. According to the research on the development of a combination of two cardiac arrhythmias of AF and SSS, such factors as CHF, BMI and the presence of dyslipidemia influence. The relationship between the development of the tachy-brady syndrome and the genetic polymorphism of the protein calsequestrin in the sample was not revealed. A population with a heterozygous type of inheritance of a protein called calsequestrin is less prone to developing a dilatation of the left atrium.
About the authorsArchakov Evgeniy A.
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Available at: https://www.ensembl.org/Homo_sapiens/Variation/ Population?db=core;r=1:115707491-115708491;v=rs6684209;vdb= variation;vf=3762971#population_freq_EUR
Kirchhof P., Auricchio A., Bax J. et al. Outcome parameters for trials in atrial fibrillation: executive summary. 2007. Eur. Heart J. 28: 2803-17.
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