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Hemostatic potential in hypertension an a basis of technology of personificated antitrimbothic prevention and therapy

L.Y. Kotlovskaya1,2, I.I. Tyutrin3, H.Kingma2,4, E.V. Udut5, T.V.Rudenko2, V.P. Fisenko6, V.V. Udut1,2

1.    Goldberg Research Institute of Pharmacology and Regenerative Medicine, 634045, 1a Nakhimov str., Tomsk, Russia

2.    National Research Tomsk State University, 634050, 36 Lenin Avenue, Tomsk, Russia 12

3.    LLC Mednord-Tekhnika, 634029, 38 Belinsky str., Tomsk, Russia 13

4.    Division of Balance Disorders, Department of Otorhinolaryngology and Head and Neck Surgery, Faculty of Health Medicine and Life Sciences, School for Mental Health and Neuroscience, Maastricht University Medical Center, Maastricht , The Netherlands

5.    Siberian State Medical University (SSMU) of Russian Ministry of Health, Russia, Tomsk, Moskovsky tract, 2, 634050

6.    First Moscow state Medical University of the Ministry of Health, Russia, Moscow, st. Bolshaya Pirogovskaya, bld. 2, p. 4, 119991

Abstract. The paper contains data on hemostatic potential in patients with stage 1 and stage 2 hypertension. Endothelium is a metabolic system which primarily responds to changes in  homeostasis and serves as a «stabilizer» of the aggregate state of blood. Hypertensive heart  disease is accompanied by endothelial dysfunction manifested by vasoconstriction, increased secretion and adhesion of the cellular system of hemostasis, activation of plasma factors of  hemostasis and, as a result, increased thrombin generation, which is the main enzyme determining the intensity of hemocoagulation. Development of endothelial dysfunction (release of the content of endothelial storage pools, contraction, and structural damage to endothelial cells with the formation of deendothelization areas and exposure of collagen fibers, etc.) contributes to the transition of hemostatic potential from hypo- and normal coagulation to hypercoagulation and causes a higher risk of thrombotic complications. Therefore, of great importance are evaluation and monitoring of the hemostatic potential in therapy aimed at preventing thrombotic hemorrhagic complications.

Кeywords: hemostatic potential, endothelial dysfunction, hypercoagulation, antitrimbothic therapy


CAC Coefficient of Anticoagulant Activity

CS Clot Strength

СTA Constant Thrombin Activity

ICC Intensity of the Coagulation Contact

ICD Intensity of the Coagulation Drive

ICP Intensity of the Clot Polymerization

MA Maximum Amplitude

RICL Retraction Intensity and Clot Lysis r.u. relative unit


It is known that hypertension is a condition with a procoagulant phenotype, which is the main symptom of cardio-vascular complicationg such as myocardial infarction, cerebral strokes, etc. Endothelial dysfunction plays an important role in the concept of hypertension cascade.

In physiological state, endothelium provides proper vasolidation, reduces aggregate 3 adhesion and secretion of thrombocytes, and prevents formation of coagulant structures, etc.. Endothelium’s antithrombogenicity is determined by the glycocalyx located on the luminal surface of vascular endothelial cells. Due to sialic acids located both on the glycocalyx and on  the surface of the blood cells, a mutual negative charge is created, which, in turn, interferes with  interaction between them [Lupinskaya Z.A. 2003; Shirinskiy V.P. 2011; Maksimenko A.V., Turashev A.D. 2014].

Thrombomodulin is an integral part of endothelial cells. Its molecules inactivate free 11 thrombin and activate protein C to prevent hemocoagulation. Besides anticoagulant function, endothelium also has an “antiplatelet” function enabled by the synthesis of natural  antiaggregants such as nitric oxide and prostacyclin [Deanfield J. E., Halcox J. P., Rabelink T. J.,  2007; Lupinskaya Z.A., Zarif'yan A. G., Gurovich T. C., 2008; Kade A.H. et al., 2011; Koryakina L.  B., 2013]. The relationship between hypertension and endothelial dysfunction has been well  established and does not require further confirmation [Cai H., Harrison D. G. 2000; Ferroni P. et al, 2006].

Poor generation of nitric oxide caused by the imbalance between free radicals and  antioxidants, hyperactivation of the renin-angiotensin system (RAS) and/or changes in the  activity of L-arginine metabolism leads to endothelium dysfunction. It was proved that early stages of hypertension are accompanied by oxidative stress developing due to the increased activity of RAS and lipid peroxidation. Hemodynamic overload contributes to more intensive damage to the endothelium in conditions of a its impaired repair potential, reduced vasodilatation of the endothelium dysfunction, and formation of a vicious circle – mutually reinforcing endothelium dysfunction and hypertension leading to the progression of hypertension, development and manifestation of thrombotic complications [Loscalzo J., 2002; Davignon J., Ganz P., 2004]. Moreover, lipid peroxidation and “cytokine aggression” appeared because of the activation of the cells of a macrophage pool leads to an increase in the synthesis of inducible NO-synthase, which is rather more active than the endothelial isoform of NO-synthase  [Corbett  J. A. et al, 1996; Verma S., Buchanan M. R., Anderson T. J., 2003; Bulanova E.L., Drapkina O. M., 2014]. Under prolonged exposure to a stimulus this results in hyperconcentration of free 35 nitric oxide and, as a consequence, an increase in the concentration of peroxynitrite, which has a  powerful cytotoxic effect and reduces endothelial repair [Pacher P., Beckman J. S., Liaudet L.,  2007.]. Therefore, there is an amplified oxidative stress and disruption of L-arginine metabolism,  i.e. biochemical substrate of nitric oxide.

Long-term activation of endothelial cells not only leads to inhibition of antithrombotic factors (thrombomodulin, heparan sulfate, etc.) but also to decrease in a surface expression of adhesion molecules (ICAM-1, VCAM-1, Е-selectin), release of a powerful vasoconstrictor – endoleline-1 and inhibitor of plasminogen (PAI-1). In turn, damage to endothelial cells facilitates the exposure of the tissue factor, i.e. initiator of the “external pathway” hemocoagulation and membrane asymmetry with the phosphatidylserine shift to the outer surface of the cell  membrane. Additionally, under prolonged activation, endothelial cells contractcausing theexposure of subendothelium structures, in particular collagen, which is a powerful procoagulant factor [Petrishchev N. N. et al. 2007].

All the mentioned processes result in an increase in thrombin generation with a decrease in its inactivation. Increased activation of a cellular segment leads to increased clotting by the release of platelet factors and by providing a surface for the assembly of plasma emocoagulation complexes.

Thus, even at the early stages of hypertension, formation of a procoagulant phenotype defines the need for monitoring hemostatic potential to prevent thrombotic and hemorrhagic complications [Shlyahto E.V., Moiseeva O.M. 2002]. In this regard, applying the method of lowfrequency piezothromboelastoraphy as a comprehensive evaluation of hemostasis to clinical and laboratory practices is paid much attention and considered to be a method for monitoring hemostatic potential and antithrombotic therapy. Unstabilized venous blood is used to gather data on all stages of fibrinogenesis (from initiation/amplification to stabilization of its lysis) [Tyutrin I. I., Klimenkova V. F., Udut V. V., 2014; Solov'ev M. A., et al., 2016; Udut V.V. et al., 2017].

Research goal 

The study aims to estimate hemostatic potential in patients with stage 1 and stage 2 hypertension.

Materials and methods

Comparative evaluation of the functional state of hemostatic potential was conducted in healthy volunteers and patients with stage 1 and stage 2 hypertension.

Volunteers must not have been exposed to any anti-aggregate or anticoagulating therapy before and must not take any medicine affecting hemostatic potential to be included into the study. The functional state of hemostatic potential was evaluated on the basis of unstabilzed whole blood by piezothromboelastography.

The method consists in recording the change in the viscoelastic characteristics of the aliquot of blood being studied, i.e. blood transition from liquid to elastic solid state. A change in the resistance of the sample is perceived by a needle resonator fixed to the surface of a piezoelectric sensor. The piezoelectric sensor performs two functions: it converts the input voltage of the low-frequency harmonic signal into mechanical oscillations applied to the needle resonator and converts the mechanical oscillations into the voltage of the output signal which is processed and displayed on the PC screen with IKS GEMO-3 (Fig.1).

Blood sampling was carried out by a three-component silicone syringe from the ulnar vein without the application of a tourniquet. Blood samples were place into disposable cuvettes for 10 seconds. The cuvettes were located in the thermostat of ARP-01M Mednord (Mednord, Russia). In real-time mode, the following hemocoagulation  parameters were analyzed: suspension stability of the blood (t1, min), intensity of coagulation of blood elements (ICC, r.u.), prothrombin time (t3, min), proteolytic (ICD, r.u.) and polymerization stages (IPS, r.u.) of fibrinogenesis, maximum amplitude of the clot (MA, r.u.) and time of its attainment (t5, min), total intensity of fibrinogenesis (ITS, r.u.), fibrinolytic activity (RICL,%), and total anticoagulant activity (CSPA, r.u.).

IBM SPSS Statistics 22.0 was used for statistical data processing. In view of the abnormal data distribution, nonparametric data processing methods were chosen – the Mann-Whitney U-test and the Kruskal-Wallis one-way analysis of variance. The quantitative indicators are given in Me [LQ; UQ], where Me is the median, LQ is the upper quartile, and UQ is the lower quartile. Differences were considered reliable at the achieved level p <0.05.

Results and discussions

In the control group, at the initial stages of hemocoagulation, the functional state of hemostatic potential as compared to the defined standards was characterized by the increased suspension stability of the blood (t1 2.2 min [1.075; 3.025]) against moderate intensity of the coagulation of blood elements (ICC 17.9 r.u. [11.9; 21.8]). Thrombin activity was within the normal values obtained from individuals of the Siberian population – CTA 33.91 r.u. [30.6;38.5]; however, there was an insignificant increase in prothrombin time reflected in the increase in t3 up to 9.45 min [7.4; 12.5] whereas the normal value of t3 is equal to 5.7-9.8 min.

The intensity of proteolytic and polymerization stages of fibrinogenesis were within the norm: ICD 35 r.u. [30; 41.5] and ICP 15 r.u. [12.8; 20.8], respectively. Despite longer prothrombin time, clotting stability and its maximum density were attained within the reference values (t5 42.1 min [31.4; 49.5] and MA 610.5 r.u. [470.5; 686.5]). The intensity of overall coagulation was also within the norm (CS 15.85 r.u. [12.35; 17]). The lytic and anticoagulant activity of the blood were also within the reference values (RICL 0.3 % [0.27; 0.43] and CAC 2.17 r.u. [1.8; 2.4].

Comparing the control group with the patients with stage 1 and stage 2 hypertension demonstrated the differences at all the stages of hemocoagulation. However, multidirectional characteristics of the obtained values in patients with hypertension stood out. Therefore, stratification of the patients by CTA was put forward. CTA characterizes the thrombin activity.

Thrombin is a key enzyme which sets the intensity of coagulation. That is why stratification was reasonable. It could help to divide the patients into groups according to the functional state of hemostatic potential regardless the stage of hypertension.

Table 2

Comparative indicators of healthy volunteers, patients with hypertension without endothelial dysfunction and patients with hypertension complicated by endothelial dysfunction.

All the patients with stage 1 and stage 2 hypertension were divided into two groups:subgroup 1 with normal level of thrombin activity (CTA ≤ 49 r.u.) and subgroup 2 with increased level of thrombin activity (CTA ≤ 50 r.u.). Subgroup 1 consisted of 12 male patients (mean age 55.08±2.667 years) and 30 female patients (mean age 56.07±1.374). Subgroup 2 included 25 males (mean age 53.72±1.719) and 59 females (mean age 52.81±0.815). The analysis of a general trend of hemocoagulation revealed hypercoagulation in both groups. CS was 1.2 times higher in subgroup 1 (up to 19.17 r.u. [15.3; 22.37]) and 1.2 times higher in subgroup 2 (up to 19.12 r.u. [15.9; 22.9]) in comparison with the control group (p<0.01).

The intensity of initial stages of hemocoagulation in the patients with hypertension was characterized by lower suspension stability of the blood reflected in the dynamics of t1. The parameter decreased by 2.4 times in subgroup 1 (t1 0.9 min [0.5; 1.9]) and by 4.4 times in subgroup 2 (t1 0.5 min [0.3; 0.9]) in comparison with the control group (p<0.01). As a result, a higher intensity of coagulation of blood elements was observed in both subgroups. The intensity increased by 1.4 times in subgroup 1 (ICC 23.6 r.u. [16.5; 39.6]) and doubled in subgroup 2 (ICC 36.7 r.u. [21.5; 52]) as compared to the control group (p<0.01).

By studying the differences observed at the initial stages of hemocoagulation, we can conclude that an increase in thrombin activity reduces suspension stability of whole blood, which is a cause of a higher adhesion and aggregate activity of blood elements. It is a common knowledge that thrombin activates numerous coagulation factors, including platelets. In case of the “transmembrane asymmetry”, two halves would equalize due to increased thrombin production. There is a transition of phosphatidylserine and phosphatidylethanolamine from the inner bilayer of the plasma membrane to the outer one and displacement of phosphatidylcholine from the outer layer to the inner layer. In addition, direct contact of thrombin with blood elements, especially with platelets, leads to activation of lipid peroxidation, which, in turn, leads to a decrease in antioxidant potential and an increase in the intensity of thrombogenesis.

Since platelets serve as the main surface for the formation of enzyme complexes activating thrombin, increase in their “initial” adhesion and aggregate activity results in acceleration of clotting. In comparison with the control group, subgroup 1 showed no difference in prothrombin time, whereas in subgroup 2 t3 halved from 9.45 min [7.4; 12.5] to 4.7 min [3.95;5.4] (p<0.01). Reduction in prothrombin time was also observed when subgroup 1 and subgroup 2 were compared; t3 decreased by 1.8 times from 8.45 min [6; 11.7] to 4.7 min [3.95; 5.4] (p<0.01).

Increase thrombin activity not only leads to higher intensity at the initial stages of hemocoagulation but also affects clotting intensity. It was revealed that both the intensity of theproteolytic stage of fibrinogenesis and thrombin activity went up. ICD in subgroup 1 increased by 1.2 times (up to 43 r.u. [34.6; 55]) and doubled in subgroup 2 (up to 69.1 r.u. [62.4; 79.3]) in comparison with the control group (p<0.01). The analysis of the polymerization stage of fibrinogenesis (ICP) showed no differences between subgroup 1 and the control group, whereas the parameter increased by 1.4 times (up to 21.1 r.u. [20; 23]) in subgroup 2 (p<0.01). A higher activity of fibrin polymerization was observed when subgroup 1 and subgroup 2 were compared.

The activity increased by 1.1 times from 18.5 r.u. [16.5; 20.37] to 21.3 r.u. [20; 23] (p<0.01). There were no statistically significant differences in the maximum density of a blood clot between subgroup 1 and subgroup 2, but in subgroup 1 there was a tendency to a greater fibrin clot density than in subgroup 2. Thus, subgroup 1 demonstrated the 1.3 times higher clot density with MA up to 694 r.u. [665.8; 738] and subgroup 2 showed the 1.1 higher clot density with MA reached 680 r.u. [633.8; 741] as compared to the control group (p<0.01). The higher clotting intensity in subgroup 1 can be explained by the increased fibrinolytic activity observed in subgroup 2. Statistically significant differences were obtained while comparting the control group with subgroup 2. RICL increased by 4.6 times up to 1.4% [0.5; 2.9] (p<0.05). This might explain the lack of reliable differences in t5, i.e. the time when a clot attains its maximum density. The increase in lytic activity leads to the formation of fibrin degradation products with pronounced anticoagulant properties. CAC, overall anticoagulant activity, increased together with CTA by 1.15 times in subgroup 1 (CTA 2.42 r.u. [2; 2.95]) and by 1.5 times in subgroup 2 (CTA 3.25 r.u. [2.85; 3.86]) in comparison with the control group (p<0.01).

Higher anticoagulant activity in patients with hypertension complicated by endothelial dysfunction could be explained by a “compensation” shift of the functional state of endothelium towards hypercoagulation, increased formation of fibrin degradation products, and higher level of the inducible form of nitric oxide synthase, which has anti-aggregate and anticoagulant properties.


The functional state of hemostatic potential of the patients with hypertension was characterized by hemostasis shift towards hypercoagulation in comparison with the healthy participants. At the early stages of hypertension (stages 1 and 2), the subjects have heterogeneous functional state of hemostatic potential, which depends on the expression of endothelial dysfunction.

The increase in the intensity of the initial stages of hemocoagulation (initiation/amplification) was observed in all the patients with hypertension. The increase was accompanied by the decrease in suspension stability of the blood and increase in contact activation of blood elements depending on the expression of antiaggregate function of endothelium.

Against the background of the initial increase in adhesion and aggregation of blood elements, prothrombin time shrank.

The enhanced intensity of proteolytic and polymerization stages of fibrinogenesis were noticed. Although clot density did not differ significantly in the healthy participants and patients with hypertension, the patients with hypertension without endothelial dysfunction demonstrated higher values than the patients with hypertension complicated by endothelial dysfunction. It might be explained by the higher fibrinolytic activity in patients suffering from complications caused by endothelial dysfunction. The more severe endothelial dysfunction was, the greater anticoagulant activity was, which can be considered as a compensatory mechanism of hemostasis activated by endothelial dysfunction.

Clinical and Applied Thrombosis/Hemostasis (CATH)

Клинический и прикладной тромбоз/гемостаз — рецензируемый медицинский журнал, посвященный исследованиям в области гематологии. Главный редактор — Чарльз А. Картер, PharmD, MBA. Он был основан в 1995 году и в настоящее время публикуется Sage Publishing.

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  • "Алапаевская городская больница", г. Алапаевск
  • "Талицкая ЦРБ", г. Талицк
  • "Белоярская ЦРБ", г. Белоярск
  • ГАУЗ СО ГБ, г. Асбест
Республика Дагестан
  • Перинатальный центр, г. Хасавюрт
  • Перинатальный центр, г. Махачкала
Волгоградская область
  • БСМП №25, г. Волгоград
  • Родильный дом №1, г. Волгоград
  • Родильный дом №2, г. Волгоград
  • БУЗ "Волгоградский областной клинический кардиологический центр"
  • КБ №4, г. Волгоград
Курганская область
  • Перинатальный центр, Курган
Оренбуржская область
  • Перинатальный центр, г. Оренбург
Новосибирская область
  • НИИТО, г. Новосибирск
  • СОМЦ ФМБА, г. Новосибирск
  • НГМУ, г. Новосибирск
  • Городская клиническая больница №34, г. Новосибирск
  • НИМЦ им. ак. Е.Н.Мешалкина, г. Новосибирск
Ростовская область
  • Перинатальный центр, г. Ростов
  • Родильный дом", г. Таганрог
  • Родильный дом №5, г. Ростов
  • ГБСМП, г. Шахты
  • ФГБУЗ ЮОМЦ ФМБА, г. Ростов
  • Городская больница №7, г. Ростов
Мурманская область
  • Родильный дом №3, г. Мурманск
Брянская область
  • Перинатальный центр, г. Брянск
  • ГАУЗ Городская больница №2, г. Брянск
  • ГАУЗ Городская больница №1, г. Брянск
Воронежская область
  • Областная клиническая больница, г. Воронеж
  • Воронежская областная детская клиническая больница № 1, г. Воронеж
  • ВГКБСМП № 8,г.Воронеж
  • ВГКБ № 3,г.Воронеж
  • Калачевская РБ,г.Калач
  • Новохоперская РБ»,г.Новохоперск
  • Острогожская РБ,г.Острогожск
  • Павловская РБ,г.Павловск
  • ВРД № 3,г.Воронеж
  • Россошанская РБ,г.Россошь
  • ВГКБСМП № 10,г.Воронеж
  • Бобровская РБ,г.Бобров
  • ОДКБ № 2,г.Воронеж
  • ВГКБСМП №1,г.Воронеж
  • Семилукская РБ им.А.В.Гончарова,г.Семилуки
  • Лискинская РБ,г.Лиски
  • Батрулиновская РБ,г.Батрулиновка
  • Хохольская РБ,Хохольский р/п
  • Перинатальный центр, г. Нальчик
Красноярский край
  • Родильный дом №4, г. Красноярск
    • Родильный дом №2, г. Красноярск
    • Перинатальный центр, г. Норильск
Республика САХА (Якутия)
  • «Республиканская больница №2 – Центр экстренной медицинской помощи», г. Якутск
  • «Республиканская больница №1 -Национальный центр медицины», г. Якутск
  • «Якутская городская клиническая больница», г. Якутск
  • «Алданская центральная районная больница», г. Алдан
  • НПЦ «Фтизиатрия, г. Якутск
Республика Адыгея
  • «Городская клиническая больница», г. Майкоп
Республика Узбекистан
  • «Республиканский специализированный научно-практический медицинский центр акушекрства и гинекологии», г. Ташкент

Акмолинская область (Казахстан)
  • "Центр охраны материнства и детства", г. Астана
  • "Перинатальный центр", г. Кокчетав

Саратовская область
  • Городская клиническая больница №10, г. Саратов

Ульяновская область
  • Перинатальный центр, г. Ульяновск

Челябинская область
  • Городская больница №2, г. Миасс
  • Частный центр "Источник", г. Челябинск
  • Городская клиническая больница №1, г. Челябинск
  • Городская клиническая больница №6, г. Челябинск
  • ОКБ №2, г. Челябинск
  • Городская клиническая больница №9, г. Челябинск
  • ОКБ №3, г. Челябинск

Краснодарский край
  • Противотуберкулезный диспансер, г. Краснодар
  • Городская больница №3, г. Краснодар

Республика Крым
  • Клиника "Генезис", г. Симферополь
  • ГБ №5, г. Севастополь
  • ГКБ №7, г. Симферополь
  • Ленинская ЦРБ

Псковская область
  • Перинатальный центр, г. Псков

Республика Карелия
  • Перинатальный центр, г. Петрозаводск

Иркутская область
  • Боханская ЦРБ, г. Бохан
  • Многопрофильная медицинская клиника "Союз", г. Иркутск

Владимирская область
  • Перинатальный центр, г. Владимир

Восточно-Казахстанская область (Казахстан)
  • Перинатальный центр, г. Усть-Каменогорск

Ивановская область
  • Медицниский центр «Европа», г. Иваново

Республика Хакасия
  • «Межрайонный родильный дом», г. Черногорск
  • Республиканский клинический перинатальный центр, г. Абакан

Камчатский край
  • Филиал № 2 ФГКУ "1477 Военно-морской клинический госпиталь" МО РФ
Ханты-мансийский Автономный Округ
  • Сургутская городская клиническая больница, г. Сургут
Вологодская область
  • Череповецкий городской родильный дом, г. Череповец
  • Вологодская инфекционная больница, г. Вологда
Республика Тыва
  • Инфекционная больница, г. Кызыл