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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">rpcardio</journal-id><journal-title-group><journal-title xml:lang="en">Rational Pharmacotherapy in Cardiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Рациональная Фармакотерапия в Кардиологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1819-6446</issn><issn pub-type="epub">2225-3653</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20996/1819-6446-2026-3232</article-id><article-id custom-type="edn" pub-id-type="custom">KDRPWZ</article-id><article-id custom-type="elpub" pub-id-type="custom">rpcardio-3232</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>ORIGINAL STUDIES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group></article-categories><title-group><article-title>Prediction of left main coronary artery lesion in patients with stable coronary artery disease using artificial intelligence technology</article-title><trans-title-group xml:lang="ru"><trans-title>Прогнозирование поражения ствола левой коронарной артерии у больных стабильной ишемической болезнью сердца с использованием технологии искусственного интеллекта</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2111-0765</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кудаев</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudaev</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кудаев Юрий Анатольевич  </p><p>ул. Аккуратова, д. 2, Санкт-Петербург, 197341 </p></bio><bio xml:lang="en"><p>Yuriy A. Kudaev </p><p>Akkuratova str., 2, St. Petersburg, 197341 </p></bio><email xlink:type="simple">kudaev51@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/0000-0002-9579-061X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лоховинина</surname><given-names>Н. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Lokhovinina</surname><given-names>N. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лоховинина Наталья Львовна  </p><p>ул. Аккуратова, д. 2, Санкт-Петербург, 197341 </p></bio><bio xml:lang="en"><p>Natalia L. Lokhovinina </p><p>Akkuratova str., 2, St. Petersburg, 197341 </p></bio><email xlink:type="simple">lokhovinina_nl@almazovcentre.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/0000-0002-2322-327X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абесадзе</surname><given-names>И. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Abesadze</surname><given-names>I. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абесадзе Инга Тенгизовна  </p><p>ул. Аккуратова, д. 2, Санкт-Петербург, 197341 </p></bio><bio xml:lang="en"><p>Inga T. Abesadze </p><p>Akkuratova str., 2, St. Petersburg, 197341 </p></bio><email xlink:type="simple">abesadze_it@almazovcentre.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/0000-0002-9397-655X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алугишвили</surname><given-names>М. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Alugishvili</surname><given-names>M. Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алугишвили Марианна Захариевна </p><p>ул. Аккуратова, д. 2, Санкт-Петербург, 197341 </p></bio><bio xml:lang="en"><p>Marianna Z. Alugishvili </p><p>Akkuratova str., 2, St. Petersburg, 197341 </p></bio><email xlink:type="simple">marianna-alugishvili@yandex.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/0000-0001-8946-2831</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калиниченко</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinichenko</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Калиниченко Александр Николаевич </p><p>Инструментальная ул., д. 2, Санкт-Петербург </p></bio><bio xml:lang="en"><p>Aleksander N. Kalinichenko </p><p>Instrumentalnaya str., 2, St. Petersburg </p></bio><email xlink:type="simple">ank-bs@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-7758-5164</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирнова</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnova</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смирнова Анастасия Павловна </p><p>Инструментальная ул., д. 2, Санкт-Петербург </p></bio><bio xml:lang="en"><p>Anastasiia P. Smirnova </p><p>Instrumentalnaya str., 2, St. Petersburg </p></bio><email xlink:type="simple">a2603114@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3356-3873</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Панов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Panov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Панов Алексей Владимирович </p><p>ул. Аккуратова, д. 2, Санкт-Петербург, 197341 </p></bio><bio xml:lang="en"><p>Alexey V. Panov </p><p>Akkuratova str., 2, St. Petersburg, 197341 </p></bio><email xlink:type="simple">panov_av@almazovcentre.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр им. В. А. Алмазова» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Almazov National Medical Research Center</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГАОУ ВО Санкт-Петербургский государственный электротехнический университет «ЛЭТИ» им. В. И. Ульянова (Ленина)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg Electrotechnical University “LETI”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>11</day><month>04</month><year>2026</year></pub-date><volume>22</volume><issue>1</issue><fpage>22</fpage><lpage>29</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kudaev Y.A., Lokhovinina N.L., Abesadze I.T., Alugishvili M.Z., Kalinichenko A.N., Smirnova A.P., Panov A.V., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Кудаев Ю.А., Лоховинина Н.Л., Абесадзе И.Т., Алугишвили М.З., Калиниченко А.Н., Смирнова А.П., Панов А.В.</copyright-holder><copyright-holder xml:lang="en">Kudaev Y.A., Lokhovinina N.L., Abesadze I.T., Alugishvili M.Z., Kalinichenko A.N., Smirnova A.P., Panov A.V.</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.rpcardio.online/jour/article/view/3232">https://www.rpcardio.online/jour/article/view/3232</self-uri><abstract><sec><title>Aim</title><p>Aim. To develop a software package that predicts the presence of significant stenosis of the left main coronary artery (LMCA) in patients with stable coronary artery disease (CАD) based on clinical and instrumental signs using machine learning (ML) methods.</p></sec><sec><title>Material and methods</title><p>Material and methods. The study included 208 patients with stable CAD, hospitalized for planned invasive coronary angiography (ICA). Based on the results of ICA, two groups of patients were identified: the main group - 104 patients with hemodynamically significant stenosis of the LMCA and the control group - 104 patients without obstructive lesions of the coronary arteries. Stenosis of the LMCA of more than 50% was considered significant. Based on the study of case histories, an Excel database was created containing information on 107 clinical and instrumental features of all patients. Based on the results of a preliminary significance analysis, 63 potentially important features were selected for further use in the classifier model. Then, 59 of the most important features from the point of view of ML were identified. Given the nature of the features under consideration, gradient boosting was chosen as the ML algorithm. The programs developed during the study were written in the Python programming language in the PyCharm integrated programming environment.</p></sec><sec><title>Results</title><p>Results. Based on the most informative features, models for predicting LMCA damage in patients with CAD were constructed. Gradient boosting was determined as the optimal ML algorithm. Three of its implementations were considered: LightGBM (Light Gradient Boosting Machine), XGBoost (Extreme Gradient Boosting) and CatBoost (Categorical Boosting). The CatBoost model turned out to be the most effective for classifying the presented objects. The software package using the CatBoost model demonstrated the accuracy of the classifier prediction of 86.2% on the test data set with a sensitivity and specificity of 77% and 76.9%, respectively. According to the constructed learning curves, it was found that further expansion of the training data volume will improve the quality of the model.</p></sec><sec><title>Conclusion</title><p>Conclusion. The developed software package for identifying hemodynamically significant stenosis of the LMCA in patients with CAD has good prognostic accuracy with the prospect of further training. The obtained solution can be integrated into the diagnostic process as part of an application for a personal computer or a web interface in order to provide support for medical decision-making.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цель</title><p>Цель. Разработать программный комплекс, прогнозирующий наличие значимого стеноза ствола левой коронарной артерии (ЛКА) у больных стабильной ишемической болезнью сердца (ИБС) на основе клинико-инструментальных признаков при помощи методов машинного обучения.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. В исследование включены 208 пациентов со стабильной ИБС, госпитализированных для плановой коронарной ангиографии. По результатам инвазивной коронароангиографии были выделены две группы больных: основная группа — 104 пациента с гемодинамически значимым стенозом ствола ЛКА и группа контроля — 104 пациента без обструктивного поражения коронарных артерий. Значимым считали стеноз ствола ЛКА &gt;50%. На основе изучения историй болезни была создана база данных Excel, содержащая информацию о 107 клинико-инструментальных признаках всех больных. На основании экспертной оценки до начала построения моделей осуществлен отбор 63 из них, которые регистрируются в медицинской карте пациента в реальной практике при стандартной стратегии диагностики ИБС согласно клиническим рекомендациям. Проведен поиск коллинеарных признаков, что позволило исключить 4 признака с низким порогом корреляции. С учетом характера рассматриваемых данных и предположения о наличии в них нелинейных взаимосвязей в качестве алгоритма машинного обучения был выбран градиентный бустинг. Разработанные в ходе исследования программы написаны на языке программирования Python в интегрированной среде программирования PyCharm.</p></sec><sec><title>Результаты</title><p> Результаты. На основе наиболее информативных признаков были построены модели прогнозирования поражения ствола ЛКА у больных ИБС. В качестве оптимального алгоритма машинного обучения был определен градиентный бустинг. Рассмотрены три его реализации: LightGBM (Light Gradient Boosting Machine), XGBoost (Extreme Gradient Boosting) и CatBoost (Categorical Boosting). Наиболее эффективной для классифицирования представленных объектов оказалась модель CatBoost. Программный комплекс с использованием модели CatBoost продемонстрировал точность прогноза классификатора 86,2% на тестовом наборе данных при чувствительности 77% и специфичности 76,9%, соответственно. По данным построенных кривых обучения установлено, что дальнейшее расширение объема обучающих данных улучшит качество модели.</p></sec><sec><title>Заключение</title><p>Заключение. Разработанный программный комплекс выявления гемодинамически значимого стеноза ствола ЛКА у больных ИБС имеет хорошую точность прогноза с перспективой дальнейшего обучения. Полученное решение может быть интегрировано в диагностический процесс в составе приложения для персонального компьютера либо веб-интерфейса с целью обеспечения поддержки принятия врачебных решений.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>ишемическая болезнь сердца</kwd><kwd>ствол левой коронарной артерии</kwd><kwd>прогнозирование</kwd><kwd>программный комплекс</kwd><kwd>машинное обучение</kwd><kwd>градиентный бустинг</kwd><kwd>диагностика</kwd><kwd>поддержка принятия врачебных решений</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Coronary artery disease</kwd><kwd>left main coronary artery</kwd><kwd>forecasting</kwd><kwd>software package</kwd><kwd>machine learning</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The study was performed with the support of  the Almazov National Medical Research Center.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">GBD 2021 Causes of Death Collaborators. 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