ROLE OF COLLAGEN SYNTHESIS AND DEGRADATION SEROMARKERS, STRUCTURAL-FUNCTIONAL HEART PARAMETERS IN PROGNOSIS OF ATRIAL FIBRILLATION AMONG PATIENTS WITH PREMATURE VENTRICULAR EXCITATION SYNDROMES

Aim. The aim of the study was to optimize the diagnosis and prognosis of developing arrhythmias in this cohort and to reveal the possible role of fibrous matrix disturbance in development of arrhythmia. Materials and methods. The main group included 43 patients with premature ventricular excitation syndromes (WPW phenomenon, WPW syndrome), the comparison group - 15 practically healthy persons of the similar age. The mean age of patients belonging to the main group was 25,3 ± 9,15 years. All the groups were comparable by gender distribution ( p = 0,45, Fisher criterion) and age ( p = 0,27, U-criterion). Results. The greatest matrix metalloproteinase-9 (MMP-9) indices were assessed in patients with WPW syndrome - 96,1 ± 33,2 ng/ml, with WPW phenomenon - 54,3 ± 21,8 ng/ml; p = 0,0003). Practically healthy persons had minimum MMP-9 values - 27,4 ± 10,9 ng/ml ( p = 0,00014; p = 0,000002). Maximum values of tissue inhibitor of matrix metalloproteinases (TI MP-1) are presented in WPW phenomenon group and practically healthy persons (418,5 ± 69,8 ng/ml and 461,7 ± 72,2 ng/ml; p = 0,27). In patients with WPW syndrome, TIMP-1 was reliably lower - 341,1 ± 90,1 ng/ml ( p = 0,002; p = 0,00012). Procollagen type 1 carboxyterminal propeptide (PICP) level in patients with WPW syndrome was 179,9 ± 76,2 ng/ml, with WPW phenomenon - 97,8 ± 31,7 ng/ml ( p = 0,00014). All patients, included into the study, significantly differed from practically healthy persons by PICP level - 69,4 ± 23,9 ng/ml ( p < 0,05, U -criterion). Statistical processing of material showed reliable differences between extracellular matrix status indices depending on WPW syndrome and phenomenon, as well as presence or absence of AF paroxysms against the background of ventricular preexcitation. Conclusions. Changes in fibrous matrix, namely, increase in MMP-9, PICP concentrations and decrease in TIMP-1was registered. WPW syndrome is characterized by significant dysbalance of collagen synthesis and degradation seromarkers than WPW phenomenon. The studied seromarkers of fibrosis, probably, participate in formation of rhythm disturbance of the heart with actual syndromes available.

Premature ventricular excitation syndromes, fibrosis seromarkers, structural-functional myocardium status