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<article article-type="research-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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">healthcare</journal-id><journal-title-group><journal-title xml:lang="ru">Здравоохранение. Healthcare</journal-title><trans-title-group xml:lang="en"><trans-title>Healthcare</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1027-7218</issn><publisher><publisher-name>Republican Scientific and Practical Center for Medical Technologies, Informatization, Management and Health Economics</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">healthcare-188</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="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</subject></subj-group></article-categories><title-group><article-title>Структурно-функциональные изменения коронарных артерий при хронической изопротеренол-индуцированной ишемии сердца</article-title><trans-title-group xml:lang="en"><trans-title>Structural and functional changes in coronary arteries in chronic isoproterenol-induced cardiac ischemia</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3592-6252</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федорова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Fiodorova</surname><given-names>Е.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федорова Екатерина Викторовна — научный сотрудник Центра морфологических исследований</p><p>Ул. Академическая, 28, 220072, г. Минск</p><p>Сл. тел. +375 17 379-17-82</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/0009-0004-1089-2636</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новаковская</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Novakovskaya</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новаковская Светлана Алексеевна</p><p>Минск</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/0000-0002-9407-9295</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ерофеева</surname><given-names>А.-М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yerofeyeva</surname><given-names>А.-М.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ерофеева Анна-Мария Вадимовна</p><p>Минск</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/0000-0002-1878-9623</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Басалай</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Basalai</surname><given-names>А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Басалай Анастасия Александровна</p><p>Минск</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Институт физиологии Национальной академии наук Беларуси</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>13</day><month>10</month><year>2025</year></pub-date><volume>0</volume><issue>8</issue><fpage>46</fpage><lpage>51</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Федорова Е.В., Новаковская С.А., Ерофеева А.В., Басалай А.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Федорова Е.В., Новаковская С.А., Ерофеева А.В., Басалай А.А.</copyright-holder><copyright-holder xml:lang="en">Fiodorova Е., Novakovskaya S., Yerofeyeva А., Basalai А.</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://healthcare.ejournal.by/jour/article/view/188">https://healthcare.ejournal.by/jour/article/view/188</self-uri><abstract><p>Цель исследования. Изучить характер и последовательность развития патоморфологических процессов в коронарных артериях крыс на разных этапах моделирования хронической ишемии сердца.Материал и методы. Хроническую сердечную недостаточность ишемического генеза у крыс линии Wistar моделировали путем подкожного введения β-адреномиметика изопротеренола гидрохлорида в дозе 10 мг/кг/сут в течение 14 сут. Через 4, 6 и 8 нед. после последней инъекции у экспериментальных животных проанализированы особенности морфофункциональных изменений коронарных сосудов и динамика изменения активности ферментов клеточного энергетического обмена.Результаты. При развитии хронического изопротеренол-индуцированного ишемического поражения миокарда (от 4-й к 8-й нед. эксперимента) отмечается прогрессирование структурных изменений в сосудистых стенках коронарных артерий крыс: как интимы (деэндотелизация и десквамация эндотелиоцитов, очаговый субэндотелиальный отек, нарушение целостности наружной и внутренней эластических мембран), так и медии и адвенцитии (дистрофия и некробиоз гладкомышечных клеток, разрыхление, отек, дезорганизация слоев, фиброз) в сочетании с нарастанием склеротических изменений периваскулярных пространств. Гистохимические изменения эндотелиальных клеток коронарных сосудов крыс проявляются компенсаторным увеличением активности лактатдегидрогеназы к 4-й нед. эксперимента с последующим снижением активности сукцинат- и лактатдегидрогеназы от 6-й к 8-й нед. эксперимента.Заключение. Выявлены морфологические изменения коронарных артерий крыс, которые иллюстрируют динамику развития структурно-функциональных изменений в сосудах при хронической изопротеренол-индуцированной ишемии сердца на поздних этапах ее развития. Структурные изменения сосудистых стенок сочетаются со снижением эффективности как аэробного, так и анаэробного пути энергообразования.</p></abstract><trans-abstract xml:lang="en"><p>Objective. To study the nature and sequence of development of pathomorphological processes in rat coronary arteries at different stages of modeling chronic cardiac ischemia.Materials and methods. Chronic heart failure of ischemic genesis in Wistar rats was modeled by subcutaneous administration of β-adrenomimetic isoproterenol hydrochloride at a dose of 10 mg/kg/day for 14 days. In 4, 6 and 8 weeks after the last injection in experimental animals the features of morphofunctional changes in coronary vessels and the dynamics of changes in the activity of enzymes of cellular energy metabolism were analyzed.Results. During the development of chronic isoproterenol-induced ischemic myocardial damage (from the 4th to the 8th week of the experiment), progression of structural changes in the vascular walls of rat coronary arteries was observed: both intima (deendothelialization and desquamation of endotheliocytes, focal subendothelial edema, disruption of the integrity of the outer and inner elastic membranes) and media and adventitia (dystrophy and necrobiosis of smooth muscle cells, loosening, edema, disorganization of layers, fibrosis) in combination with increasing sclerotic changes of perivascular spaces. Histochemical changes in endothelial cells of rat coronary vessels are manifested by a compensatory increase in lactate dehydrogenase activity by the 4th week of the experiment with a subsequent decrease in succinate and lactate dehydrogenase activity from the 6th to the 8th week of the experiment.Conclusion. The morphological changes in rat coronary arteries have been revealed, which illustrate the dynamics of development of structural and functional changes in vessels in chronic isoproterenol-induced cardiac ischemia at late stages of its development. Structural changes in vascular walls are combined with a decrease in the efficiency of both aerobic and anaerobic pathways of energy formation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эксперимент</kwd><kwd>изопротеренол</kwd><kwd>хроническая ишемия миокарда</kwd><kwd>коронарные сосуды</kwd><kwd>морфология</kwd><kwd>гистохимический анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>experiment</kwd><kwd>isoproterenol</kwd><kwd>chronic myocardial ischemia</kwd><kwd>coronary vessels</kwd><kwd>morphology</kwd><kwd>histochemical analysis</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">Global burden of cardiovascular diseases and risk factors, 1990—2019 : update from the GBD 2019 Study / G. A. Roth, G. A. Mensah, C. O. 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