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<article article-type="review-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">akusherstvo</journal-id><journal-title-group><journal-title xml:lang="en">Obstetrics, Gynecology and Reproduction</journal-title><trans-title-group xml:lang="ru"><trans-title>Акушерство, Гинекология и Репродукция</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2313-7347</issn><issn pub-type="epub">2500-3194</issn><publisher><publisher-name>IRBIS LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17749/2313-7347/ob.gyn.rep.2025.610</article-id><article-id custom-type="elpub" pub-id-type="custom">akusherstvo-2347</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>REVIEW ARTICLES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>НАУЧНЫЕ ОБЗОРЫ</subject></subj-group></article-categories><title-group><article-title>Immune paradoxes of vaccine-induced thrombotic thrombocytopenia (VITТ), heparin-induced thrombocytopenia (HIT) and thrombosis: from general mechanisms to the unique VITТ and HIT course</article-title><trans-title-group xml:lang="ru"><trans-title>Иммунные парадоксы вакцининдуцированной тромботической тромбоцитопении (ВИТТ), гепарин-индуцированной тромбоцитопении (ГИТ) и тромбозов: от общих механизмов к уникальному течению ВИТТ и ГИТ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7415-4633</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макацария</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Makatsariya</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Макацария Александр Давидович, д.м.н., проф., академик РАН</p><p>Scopus Author ID: 57222220144</p><p>WoS ResearcherID: M-5660-2016</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Alexander D. Makatsariya, MD, Dr Sci Med, Prof., Academician of RAS</p><p>Scopus Author ID: 57222220144</p><p>WoS ResearcherID: M-5660-2016</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6012-453X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Акиньшина</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Akinshina</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Светлана Владимировна Акиньшина, к.м.н</p><p>Scopus Author ID: 15072687000</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Svetlana V. Akinshina, MD, PhD</p><p>Scopus Author ID: 15072687000</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><email xlink:type="simple">Svetlana_akin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4509-9281</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Воробьев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vorobev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Воробьев Александр Викторович, к.м.н. </p><p>Scopus Author ID: 57191966265</p><p>Wos ResearcherID: F-8804-2017</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Alexander V. Vorobev, MD, PhD</p><p>Scopus Author ID: 57191966265</p><p>Wos ResearcherID: F-8804-2017</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8404-1042</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бицадзе</surname><given-names>В. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Bitsadze</surname><given-names>V. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бицадзе Виктория Омаровна, д.м.н., проф., профессор РАН </p><p>Scopus Author ID: 6506003478</p><p>WoS ResearcherID: F-8409-2017</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Victoria O. Bitsadze, MD, Dr Sci Med, Prof., Professor RAS</p><p>Scopus Author ID: 6506003478</p><p>WoS ResearcherID: F-8409-2017</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0725-9686</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хизроева</surname><given-names>Д. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Khizroeva</surname><given-names>J. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хизроева Джамиля Хизриевна, д.м.н., проф. </p><p>Scopus Author ID: 57194547147</p><p>WoS ResearcherID: F-8384-2017</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Jamilya Kh. Khizroeva, MD, Dr Sci Med, Prof/</p><p>Scopus Author ID: 57194547147</p><p>WoS ResearcherID: F-8384-2017</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3628-0804</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Третьякова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tretyakova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Третьякова Мария Владимировна, к.м.н.</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Maria V. Tretyakova, MD, PhD</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2541-3843</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макацария</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Makatsariya</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Макацария Наталия Александровна, к.м.н.</p><p>WoS ResearcherID: F-8406-2017</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Nataliya A. Makatsariya, MD, PhD.</p><p>WoS ResearcherID: F-8406-2017</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2070-1192</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калашникова</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalashnikova</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Калашникова Ирина Сергеевна, к.м.н. </p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Irina S. Kalashnikova, MD, PhD.</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0764-4477</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гашимова</surname><given-names>Н. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Gashimova</surname><given-names>N. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гашимова Нилуфар Рамиль кызы, к.м.н.</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Nilufar R. Gashimova, MD, PhD. </p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7756-8935</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Григорьева</surname><given-names>К. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Grigoreva</surname><given-names>K. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Григорьева Кристина Николаевна, к.м.н.</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Kristina N. Grigoreva, MD, PhD. </p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-0838-2319</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанов</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanov</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Степанов Иван Алексеевич</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Ivan A. Stepanov</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-3406-9757</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дикарева</surname><given-names>И. 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Tatarintseva</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2136-1641</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лазарчук</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lazarchuk</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Arina V. Lazarchuk</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-5190-4958</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хисамиева</surname><given-names>А. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Khisamieva</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хисамиева Азалия Рустемовна</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2</p></bio><bio xml:lang="en"><p>Azaliia R. Khisamieva</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3367-9844</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блинов</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Blinov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Блинов Дмитрий Владиславович, к.м.н.</p><p>Scopus Author ID: 6701744871</p><p>WoS ResearcherID: E-8906-2017</p><p>101000 Москва, Лялин переулок, д. 11–13/1;123056 Москва, 2-я Брестская ул., д. 5, с. 1–1а; 141551 Московская область, деревня Голубое, Родниковая ул., стр. 6, к. 1</p></bio><bio xml:lang="en"><p>Dmitry V. Blinov, MD, PhD, MBA.</p><p>Scopus Author ID: 6701744871</p><p>WoS ResearcherID: E-8906-2017</p><p>11–13/1 Lyalin Pereulok, Moscow 101000; 5 bldg. 1–1a, 2-ya Brestskaya Str., Moscow 123056; 6 bldg. 1, Rodnikovaya Str., Village Goluboe, Moscow region 141551</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8120-4782</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ван Дреден</surname><given-names>П.</given-names></name><name name-style="western" xml:lang="en"><surname>Van Dreden</surname><given-names>P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ван Дреден Патрик, д.м.н., проф. </p><p>Scopus Author ID: 55915955300</p><p>Париж, INSERM UМR_S_938</p></bio><bio xml:lang="en"><p>Patrick Van Dreden, MD, Dr Sci Med, Prof.</p><p>Scopus Author ID: 55915955300</p><p>NSERM UМR_S_938, Paris</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9899-9910</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гри</surname><given-names>Ж.-К.</given-names></name><name name-style="western" xml:lang="en"><surname>Gris</surname><given-names>J.-Ch.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гри Жан-Кристоф, д.м.н., проф.</p><p>Scopus Author ID: 7005114260</p><p>WoS ResearcherID: AAA-2923-2019</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2; 34090 Монпелье, ул. Огюста Бруссоне, д. 163</p></bio><bio xml:lang="en"><p>Jean-Christophe Gris, MD, Dr Sci Med, Prof. </p><p>Scopus Author ID: 7005114260</p><p>WoS ResearcherID: AAA-2923-2019</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991; 163 Rue Auguste Broussonnet, Montpellier 34090</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9576-1368</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Элалами</surname><given-names>И.</given-names></name><name name-style="western" xml:lang="en"><surname>Elalamy</surname><given-names>I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Элалами Исмаил, д.м.н., проф. </p><p>Scopus Author ID: 7003652413</p><p>WoS ResearcherID: AAC-9695-2019</p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2; 75006 Париж, Улица медицинского факультета, д. 12;75020 Париж, Китайская улица, д. 4</p></bio><bio xml:lang="en"><p>Ismail Elalamy, MD, Dr Sci Med, Prof.</p><p>Scopus Author ID: 7003652413</p><p>WoS ResearcherID: AAC-9695-2019</p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991; 12 Rue de l’École de Médecine, Paris 75006; Hospital Tenon</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2316-6348</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Геротзиафас</surname><given-names>Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Gerotziafas</surname><given-names>G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Геротзиафас Григориос, д.м.н., проф. </p><p>119991 Москва, ул. Трубецкая, д. 8, стр. 2; 75006 Париж, Улица медицинского факультета, д. 12;75020 Париж, Китайская улица, д. 4</p></bio><bio xml:lang="en"><p>Grigoriоs Gerotziafas, MD, Dr Sci Med, Prof. </p><p>8 bldg. 2, Trubetskaya Str., Moscow 119991; 12 Rue de l’École de Médecine, Paris 75006; 4 Rue de la Chine, Paris 75020</p></bio><xref ref-type="aff" rid="aff-5"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАОУ ВО Первый Московский государственный медицинский университет имени И.М. Сеченова Министерства здравоохранения Российской Федерации (Сеченовский Университет)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sechenov University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт Превентивной и Социальной Медицины; АНО ДПО «Московский медико-социальный институт имени Ф.П. Гааза»; ФГБУ «Федеральный научно-клинический центр медицинской реабилитации и курортологии Федерального медико-биологического агентства»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute for Preventive and Social Medicine; Moscow Haass Medical – Social Institute; Federal Scientific and Clinical Center for Medical Rehabilitation and Balneology, Federal Medical-Biological Agency</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Университет Сорбонны</institution><country>Франция</country></aff><aff xml:lang="en"><institution>Sorbonne University</institution><country>France</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>ФГАОУ ВО Первый Московский государственный медицинский университет имени И.М. Сеченова Министерства здравоохранения Российской Федерации (Сеченовский Университет); Университет Монпелье</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sechenov University; University of Montpellier</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>ФГАОУ ВО Первый Московский государственный медицинский университет имени И.М. Сеченова Министерства здравоохранения Российской Федерации (Сеченовский Университет); Медицинский Университет Сорбонны; Госпиталь Тенон</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sechenov University; Medicine Sorbonne University; Hospital Tenon</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>03</month><year>2025</year></pub-date><volume>19</volume><issue>1</issue><fpage>97</fpage><lpage>109</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Makatsariya A.D., Akinshina S.V., Vorobev A.V., Bitsadze V.O., Khizroeva J.K., Tretyakova M.V., Makatsariya N.A., Kalashnikova I.S., Gashimova N.R., Grigoreva K.N., Stepanov I.A., Dikareva I.M., Tatarintseva A.Y., Lazarchuk A.V., Khisamieva A.R., Blinov D.V., Van Dreden P., Gris J., Elalamy I., Gerotziafas G., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Макацария А.Д., Акиньшина С.В., Воробьев А.В., Бицадзе В.О., Хизроева Д.Х., Третьякова М.В., Макацария Н.А., Калашникова И.С., Гашимова Н.Р., Григорьева К.Н., Степанов И.А., Дикарева И.М., Татаринцева А.Ю., Лазарчук А.В., Хисамиева А.Р., Блинов Д.В., Ван Дреден П., Гри Ж., Элалами И., Геротзиафас Г.</copyright-holder><copyright-holder xml:lang="en">Makatsariya A.D., Akinshina S.V., Vorobev A.V., Bitsadze V.O., Khizroeva J.K., Tretyakova M.V., Makatsariya N.A., Kalashnikova I.S., Gashimova N.R., Grigoreva K.N., Stepanov I.A., Dikareva I.M., Tatarintseva A.Y., Lazarchuk A.V., Khisamieva A.R., Blinov D.V., Van Dreden P., Gris J., Elalamy I., Gerotziafas G.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.gynecology.su/jour/article/view/2347">https://www.gynecology.su/jour/article/view/2347</self-uri><abstract><sec><title>Aim</title><p>Aim: to carry out a comparative analysis of the pathogenesis, clinical manifestations, diagnostic criteria as well as therapeutic strategies of vaccine-induced thrombotic thrombocytopenia (VITТ) and heparin-induced thrombocytopenia (HIT), two rare but potentially life-threatening conditions associated with antibody-dependent platelet activation.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods. Current data on the pathogenesis, epidemiology, clinical presentation, diagnosis, and treatment of VITТ and HIT have been reviewed including an analysis of existing diagnostic scoring systems, laboratory tests, and therapeutic approaches. The study is based on the data obtained from systematic reviews, clinical studies, and up-to-date clinical guidelines.</p></sec><sec><title>Results</title><p>Results. VITТ and HIT share a common pathophysiological mechanism involving the production of antibodies against platelet factor 4 (PF4) and subsequently developing thrombotic complications. However, a key difference lies in the triggers of the immune response: HIT is induced by heparin exposure, whereas VITТ develops following the administration of adenoviral vector vaccines against SARS-CoV-2. HIT is primarily characterized by venous thrombosis, while VITТ predominantly manifests with atypical thromboses, including cerebral venous sinus thrombosis. Both conditions require immediate medical intervention; however, HIT management involves discontinuation of heparin and the initiation of using alternative anticoagulants, whereas VITТ treatment requires administration of intravenous immunoglobulins and anticoagulants, including heparin-based agents.</p></sec><sec><title>Conclusion</title><p>Conclusion. Despite their rarity, VITТ and HIT pose significant health risks to patients. Modern diagnostic methods, including the 4Тs scoring system and serological testing, facilitate the timely identification of HIT, whereas VITТ diagnostics remains a complex challenge and requires further standardization. Optimizing therapeutic strategies, including the use of novel anticoagulants and immunosuppressive approaches, is a priority task to reduce mortality and improve patient outcomes.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цель</title><p>Цель: сравнительный анализ патогенеза, клинических проявлений, диагностических критериев и терапевтических стратегий вакцин-индуцированной тромботической тромбоцитопении (ВИТТ) и гепарин-индуцированной тромбоцитопении (ГИТ) – двух редких, но потенциально жизнеугрожающих состояний, связанных с антителозависимой активацией тромбоцитов.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Выполнен обзор современных данных по патогенезу, эпидемиологии, клинике, диагностике и лечению ВИТТ и ГИТ, включая анализ существующих диагностических шкал, лабораторных тестов и терапевтических подходов. Методология обзора включала анализ данных систематических обзоров, клинических исследований и актуальных клинических рекомендаций.</p></sec><sec><title>Результаты</title><p>Результаты. ВИТТ и ГИТ объединяет общий патогенетический механизм, связанный с выработкой антител против фактора 4 тромбоцитов (англ. platelet factor 4, PF4) и развитием тромботических осложнений. Однако ключевое различие заключается в триггерах иммунного ответа: ГИТ индуцируется применением гепарина, тогда как ВИТТ развивается после введения аденовирусных векторных вакцин против SARS-CoV-2. ГИТ характеризуется тромбозами венозного русла, тогда как ВИТТ проявляется преимущественно атипичными тромбозами, включая церебральные венозные синусы. Оба состояния требуют немедленного вмешательства, но терапия ГИТ основывается на отмене гепарина и назначении альтернативных антикоагулянтов, тогда как ВИТТ требует применения внутривенных иммуноглобулинов и антикоагулянтов, в том числе препаратов гепарина.</p></sec><sec><title>Заключение</title><p>Заключение. Несмотря на редкость, ВИТТ и ГИТ представляют серьезную угрозу здоровью пациентов. Современные диагностические методы, включая шкалу 4T и серологическое тестирование, позволяют своевременно выявлять ГИТ, в то время как диагностика ВИТТ остается сложной и требует дальнейшей стандартизации. Оптимизация терапевтических стратегий, включая применение новых антикоагулянтов и иммуносупрессивных методов, является приоритетной задачей для снижения смертности и улучшения исходов у пациентов с данными состояниями.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>вакцин-индуцированная тромботическая тромбоцитопения</kwd><kwd>ВИТТ</kwd><kwd>гепарин-индуцированная тромбоцитопения</kwd><kwd>ГИТ</kwd><kwd>тромбоз</kwd><kwd>антитела против фактора 4 тромбоцитов</kwd><kwd>PF4</kwd><kwd>иммунные комплексы</kwd><kwd>коагулопатия</kwd><kwd>альтернативные антикоагулянты</kwd><kwd>внутривенные иммуноглобулины</kwd><kwd>диагностические критерии</kwd><kwd>COVID-19 вакцинация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>vaccine-induced thrombotic thrombocytopenia</kwd><kwd>VITТ</kwd><kwd>heparin-induced thrombocytopenia</kwd><kwd>HIT</kwd><kwd>thrombosis</kwd><kwd>anti-platelet factor 4 antibodies</kwd><kwd>PF4</kwd><kwd>immune complexes</kwd><kwd>coagulopathy</kwd><kwd>alternative anticoagulants</kwd><kwd>intravenous immunoglobulins</kwd><kwd>diagnostic criteria</kwd><kwd>COVID-19 vaccination</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Weismann R.E., Tobin R.W. 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