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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">phkinetica</journal-id><journal-title-group><journal-title xml:lang="ru">Фармакокинетика и Фармакодинамика</journal-title><trans-title-group xml:lang="en"><trans-title>Pharmacokinetics and Pharmacodynamics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-7836</issn><issn pub-type="epub">2686-8830</issn><publisher><publisher-name>ООО «Издательство ОКИ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37489/2587-7836-2023-1-41-44</article-id><article-id custom-type="elpub" pub-id-type="custom">phkinetica-358</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>ДОКЛИНИЧЕСКИЕ ИССЛЕДОВАНИЯ ФАРМАКОКИНЕТИКИ И ФАРМАКОДИНАМИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRE-CLINICAL STUDIES OF PHARMACOKINETICS AND PHARMACODYNAMICS</subject></subj-group></article-categories><title-group><article-title>Сравнительная оценка эхокардиографических и морфометрических характеристик левого желудочка сердца крыс</article-title><trans-title-group xml:lang="en"><trans-title>Comparative evaluation of echocardiographic and morphometric characteristics of the rat heart left ventricle</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0154-722X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ионова</surname><given-names>Е. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Ionova</surname><given-names>E. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ионова Екатерина Олеговна, м. н. с. лаборатории фармакологического скрининга</p><p>Москва</p></bio><bio xml:lang="en"><p>Ionova Ekaterina О., Junior Research Scientist of Laboratory of Pharmacological Screening</p><p>Moscow</p></bio><email xlink:type="simple">mrakusha26@rambler.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/0000-0002-3208-198X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мирошкина</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Miroshkina</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мирошкина Ирина Александровна, н. с. лаборатории лекарственной токсикологии</p><p>Москва</p></bio><bio xml:lang="en"><p>Miroshkina Irina A., Research scientist of the laboratory of drug toxicology </p><p>Moscow</p></bio><email xlink:type="simple">iris10.81@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/0000-0002-9600-7244</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сорокина</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sorokina</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сорокина Александра Валериановна, к. б. н., в. н. с. лаборатории лекарственной токсикологии</p><p>Москва</p></bio><bio xml:lang="en"><p>Sorokina Alexandra V., PhD, Cand. Sci. (Biology), Leading researcher of the laboratory of drug toxicology</p><p>Moscow</p></bio><email xlink:type="simple">alex-mike5475@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/0000-0003-2832-4739</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крыжановский</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kryzhanovskii</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крыжановский Сергей Александрович, д. м. н., зав. лабораторией фармакологического скрининга</p><p>Москва</p></bio><bio xml:lang="en"><p>Kryzhanovskii Sergey А., Dr. Sci (Med.), Head of laboratory of pharmacological screening</p><p>Moscow</p></bio><email xlink:type="simple">SAK-538@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «НИИ фармакологии имени В.В. Закусова»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBI “Zakusov Institute of Pharmacology”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>10</day><month>05</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>41</fpage><lpage>44</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ионова Е.О., Мирошкина И.А., Сорокина А.В., Крыжановский С.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Ионова Е.О., Мирошкина И.А., Сорокина А.В., Крыжановский С.А.</copyright-holder><copyright-holder xml:lang="en">Ionova E.O., Miroshkina I.A., Sorokina A.V., Kryzhanovskii S.A.</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.pharmacokinetica.ru/jour/article/view/358">https://www.pharmacokinetica.ru/jour/article/view/358</self-uri><abstract><p>Цель исследования. Сравнительная оценка эхокардиографических и морфометрических размеров левого желудочка сердца крыс. Материалы и методы. В исследование было включено 10 беспородных крыс-самцов массой 160–180 г. Размеры левого желудочка сердца оценивали при помощи эхокардиографии и морфометрии. Измерения проводили согласно стандартным протоколам. Для проведения морфометрических измерений сердца останавливали в систолу летальной дозой (1,0 мг/кг) 0,025 % раствора строфантина К, а в диастолу — погружением сердец в охлаждённый физиологический раствор (бескальциевая среда). Результаты. Показано, что систолический размер левого желудочка сердца, согласно данным эхокардиографии, равняется 1,79Ѓ}0,10 мм, а морфометрии — 1,64Ѓ}0,09 мм (p = 0,302); диастолический размер левого желудочка, соответственно, 3,42Ѓ}0,16 мм и 3,66Ѓ}0,17 мм (р = 0,318). Выявленные расхождения не превышают 10 % и, по всей видимости, связаны с тем, что неинвазивным эхокардиографическим методом измеряются физиологические размеры левого желудочка сердца, а для морфометрических измерений размеров в систолу сердца останавливали инъекцией строфантина К, что влечёт за собой перегрузку клеток сердца ионами Са2+ и вследствие этого контрактуру кардиомиоцитов; посмертная остановка сердца в диастолу, в бескальциевой среде, сопровождается потерей тонуса сердечной мышцы и, следовательно, дилатация левого желудочка будет, естественно, больше, чем физиологическая. Заключение. Неинвазивное эхокардиографическое измерение размеров левого желудочка сердца достаточно в полной мере отражает фактические размеры левого желудочка сердца крысы (расхождение не превышает 10 %), т. е. эхокардиографические измерения валидны.</p></abstract><trans-abstract xml:lang="en"><p>Purpose of the study. Comparative evaluation of echocardiographic and morphometric dimensions of the rat heart left ventricle. Materials and methods. The study included 10 outbred male rats weighing 160–180 g. The size of the heart left ventricle was assessed using echocardiography and morphometry. The measurements were carried out according to standard protocols. To perform morphometric measurements, hearts were stopped in systole with a lethal dose (1.0 mg/kg) of 0.025 % strophanthin K solution, and in diastole, by immersing the hearts in a chilled physiological solution (calcium-free medium). Results. It was shown that the systolic size of the left ventricle of the heart according to echocardiography is 1.79Ѓ}0.10 mm, and morphometry 1.64Ѓ}0.09 mm (p = 0,302); diastolic size of the left ventricle, respectively, 3.42Ѓ}0.16 mm and 3.66Ѓ}0.17 mm (р = 0,318). The detected discrepancies do not exceed 10 % and, apparently, are due to the fact that the physiological dimensions of the heart left ventricle are measured by a non-invasive echocardiographic method, and for morphometric measurements of the dimensions in the systole, the heart was stopped by injection of strophanthin K, which entails an overload of heart cells with Ca2+ ions and as a result, contracture of cardiomyocytes; post-mortem cardiac arrest in diastole, in a calcium-free environment, is accompanied by a loss of cardiac muscle tone and, therefore, dilatation of the left ventricle will naturally be greater than physiological. Conclusion. Noninvasive echocardiographic measurement of the size of the heart left ventricle fully reflects the actual size of the left ventricle of the rat heart (the difference does not exceed 10 %), i. e. echocardiographic measurements are valid.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эхокардиография</kwd><kwd>морфометрия</kwd><kwd>систолический размер левого желудочка сердца</kwd><kwd>диастолический размер левого желудочка сердца</kwd><kwd>валидность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>echocardiography</kwd><kwd>morphometry</kwd><kwd>systolic size of the left ventricle of the heart</kwd><kwd>diastolic size of the left ventricle of the heart</kwd><kwd>validity</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">Guo K, Wu J, Kong Y, et al. 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