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Aim. To evaluate diagnostic significance of the type A vascular endothelial growth factor (VEGF-A) and its receptors type 1 and 2 (VEGF-R1 and VEGF-R2) in primary mitral valve prolapse (MVP) patients.Material and methods. Totally, 83 MVP patients studied: 61 males, 22 females; mean age 21,93±4,22 y. o. The signs of systemic inflammation were assessed, as the grade of connective tissue involvement. Immune enzyme analysis was done for serum levels of VEGF-А, VEGF-R1 and VEGF-R2 (“Bender MedSystems GmbH”,Austria). Controls included 20 healthy volunteers — 14 males, 6 females, mean age 21,10±0,55 y. o. with no MVP and any other dysplastic features.Results. In the MVP group, the decreased levels of circulating VEGF-R1 were found, as the increase of cases number of high (42,17%) and low (32,53%) concentration of VEGF-А. In low levels of VEGF-A and VEGF-A/ VEGF-R1 prevalence of grade II mitral regurgitation increases 5,1 times comparing to the group of retained balance of VEGF-A and VEGF-R1 — 95% confidence interval (CI) 1,25-20,88, and the prevalence of clinically significant cardiac rhythm and conduction disorders increases 5,25 times in comparison to the cases with elevated VEGF-A and VEGF-R1 — 95% CI 1,33-20,76 and 4,09 times — comparing MVP patients with retained balance of VEGF-A and VEGF-R1 — 95% CI 1,18-14,17.Conclusion. In primary MVP patients, regardless clinical phenotype of monogenic hereditary syndromes, the heterogeneity of deviation and regulation of VEGF has been established. Highest number of II grade mitral regurgitation, significant rhythm disorders was found in the group with low VEGF-A and VEGF-A/VEGF-R1, that might be implemented as optimized risk stratification in heterogenic MVP patients population.

Aim. To assess the condition of adhesion function of endothelium in various clinical variants of primary mitral valve prolapse (MVP). Material and methods. Totally, 91 patient studied with primary MVP at the age 21 (19-24) y. First grade mitral regurgitation was found in 45,1% and II — in 54,9% patients. MVP was solitary variant (6,6%) and comorbid with 1-3 minor anomalies of the heart (93,4%). Doppler-echocardiography was done on Vivid07 equipment (Israel). The grade of systemic involvement of connective tissue was 2 (1,5-4,0) points. Controls were 10 healthy persons, matched by age, sex, smoking, body mass index. By the immune enzyme method we checked plasmatic concentrations of L-, E-, Р-selectins, ICAM-1, VCAM-1, PECAM-1 (Bender MedSystems GmbH, Austria). Findings are presented as mediana (25-75 percentiles). Results. In MVP patients the levels of Е-selectin — 43,0 (33,7-54,8) ng/ mL, ICAM-1 — 669,9 (546,4-883,3) ng/mL and VCAM-1 — 925,0 (707,5- 1215,0) ng/mL, were significantly higher, and the level of РЕСАМ-1 — 49,8 (40,4-63,2) ng/mL, in opposite, lower than in control group. L- and P-selectins levels in MVP group were measured as relevant to controls values (p>0,05). In regurgitation cases of II degree, the level of E-selectin and ICAM-1 were maximal (p

Aim. To investigate regulatory vasoactive mediators – endothelin-1 (ET-1), 6-ketoprostaglandin F1α (6-keto-PGF1α), thromboxane В2 (TXВ2) – in young patients with minor heart anomalies (MHA) and non-differentiated connective tissue dysplasia (CTD). Material and methods. Fifty-three patients, 37 men and 16 women (mean age 22,0±0,8 years) were examined. Plasma concentrations of ТХВ2, 6-keto-PGF1α and ET-1 were measured by immune-enzyme methods. Results. Some specific features of vasoactive mediators in MHA were observed. In patients with three MHA, ET-1 level was increased. In Stage II mitral valve prolapse (MVP), combined with atopic chord (AC) and/or Stage II mitral regurgitation, TXB2 level was increased, without any significant thromboxane-prostacyclin dysbalance. In patients with mixomatous MV degeneration, plasma ET-1 concentration was increased, and TXB2 level was higher than that of 6-keto-PGF1α. Conclusion. In MHA patients, functional endothelial status is disturbed. Disturbance severity is maximal in three MHA and mixomatous MV degeneration.