Background:In ankylosing spondylitis (AS), early subclinical changes in the myocardium mostly remain undiagnosed. The impact of genetic engineering biological therapy on these changes is also unclear.Objectives:Aim: to establish the relationship between taking of secukinumab and changes in systolic and diastolic myocardial function in patients with AS.Methods:69 patients with AS were examined, of which the first group included 33 people (average age 38.8±4.74, 63.6% of men) who received the interleukin 17 inhibitor (IL17) - secukinumab, the second group - 36 people who did not receive biological therapy, average age 42.5±11 years, 66.7% of men. The control group included 40 healthy individuals, comparable in gender and age. Patients underwent tissue dopplerography of the heart and transthoracic echocardiography. The research materials were subjected to statistical processing using the program STATISTICA 10.0.Results:The patients with AS had significantly higher left ventricular mass index and ejection fraction (p<0.01) compared to the control group. Moreover, among patients who do not take biological therapy, the indicators were the highest (tabl.1).Table 1.Comparison of transthoracic echocardiography parameters in the study groups according to the Craskell-Wallis test.Показательgroup 1group 2control groupрLVMI85 [81; 100]93 [81,3; 114,2]79,5 [72; 86,5]р=0,002EF63 [62; 64]64,5 [63; 66]60 [59,5; 64,5]р=0,003LVMI – ventricular myocardial mass index, EF – ejection fraction.A comparison of tissue dopplerography of the heart between the groups established statistically higher values of peak velocity of the ring of the mitral valve in early diastole (e’L) in the 1st group (14 [9,5; 14]) and control (13 [11; 15,5]) compared with the indicator of the second group (10,5 [8,3; 13]), p<0,01; the peak speed of movement of the septum in early diastole, (e’S) in patients with secukinumab is higher (11 [9; 11]) compared to 2th (8.1 [7; 12]) and control groups 10 [8.5; 11]), p<0.05, and in the 2nd group lower than in the control (p=0.03). Significant differences in the parameters were supported by a comparison of the frequency of detection of diastolic dysfunction in the study groups. Diastolic dysfunction was diagnosed only in this group - in 38.9%. Against the background of the use of secukinumab, an increase in the systolic function of the myocardium was revealed.Conclusion:The patients with AS are characterized by a high frequency of subclinical heart dysfunction. Inhibition of IL17 can reduce diastolic dysfunction, which is confirmed by an improvement in myocardial contractility during secukinumab therapy.References:[1]ankylosing spondylitis, spondylarthritis, diastolic myocardial dysfunction, secukinumabDisclosure of Interests:None declared.