THE ROLE OF LEFT VENTRICULAR HYPERTROPHY, RS1801253 AND RS1801252 ALLELIC POLYMORPHISMS OF ADRB1 IN ASSESSING THE...

The aim: To study the association of left ventricular hypertrophy (LVH) and polymorphisms rs1801253 and rs1801252 of the ADRB1 gene with the risk of sudden cardiac death (SCD).

Materials and methods: The study included 179 patients which underwent clinical investigation, echocardiography, elektrokardiography. The examined were divided into groups with a low (110 people) and high risk (69 people) of SCD. The distribution of allelic polymorphisms was investigated with polymerase chain reaction (PCR).

Results: All patients of group with high-risk cardiovascular mortality showed a decrease in heart rate variability (RV) due to an increase in sympathetic activity (p=0.013). Also, in the group of patients with LVH, predictors of sudden cardiac death and arrhythmogenic substrate, were observed. The variability of the allele C1165G rs1801253 of the ADRB1 gene was associated with an increased risk (2.55-fold increase) of SCD and LVH. Also, the associations of polymorphic locus A145G (rs1801252) of the ADRB1 gene proved the presence of a permanent difference for the "risky" allele A in patients with a high risk of SCD.

Conclusions: It was set the probable association of alleles rs1801253 (C1165G) and rs1801252 (A145G) ADRB1 at the patients with a high risk of SCD compared to the control group.