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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Bulletin of Rehabilitation Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Bulletin of Rehabilitation Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник восстановительной медицины</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2078-1962</issn><issn publication-format="electronic">2713-2625</issn><publisher><publisher-name xml:lang="en">National Medical Research Center for Rehabilitation and Balneology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">700717</article-id><article-id pub-id-type="doi">10.38025/2078-1962-2026-25-3-77-82</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Technology for early diagnosis of latent right ventricular dysfunction in elite athletes with overtraining syndrome: a control study</article-title><trans-title-group xml:lang="ru"><trans-title>Технология ранней диагностики скрытой дисфункции правого желудочка у высококвалифицированных спортсменов при синдроме перетренированности: контрольное исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2780-6998</contrib-id><name-alternatives><name xml:lang="en"><surname>Andreev</surname><given-names>Dmitry A.</given-names></name><name xml:lang="ru"><surname>Андреев</surname><given-names>Дмитрий Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Med.), Head of the Cardiology Center</p></bio><bio xml:lang="ru"><p>кандидат медицинских наук, руководитель Кардиологического центра</p></bio><email>akish@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-3638-9772</contrib-id><name-alternatives><name xml:lang="en"><surname>Kish</surname><given-names>Anna A.</given-names></name><name xml:lang="ru"><surname>Киш</surname><given-names>Анна Андреевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Med.), Head of Laboratory No. 54 for Medical and Biological Support of the Activities of Persons in Extreme Professions, Center for Special Research</p></bio><bio xml:lang="ru"><p>кандидат медицинских наук, заведующий лабораторией № 54 медико-биологического сопровождения деятельности лиц экстремальных профессий, Центр специальных исследований</p></bio><email>akish@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5124-6954</contrib-id><name-alternatives><name xml:lang="en"><surname>Goloborodko</surname><given-names>Evgeny V.</given-names></name><name xml:lang="ru"><surname>Голобородько</surname><given-names>Евгений Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D.Sc. (Med.), Head of the Department of Organization and Control of Research and Development Work, Center for Special Research</p></bio><bio xml:lang="ru"><p>доктор медицинских наук, заведующий отделом организации и контроля научно-исследовательских опытно-конструкторских работ, Центр специальных исследований</p></bio><email>akish@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">A.I. Burnazyan Federal State Budgetary Institution of the Federal Medical and Biological Agency of Russia</institution></aff><aff><institution xml:lang="ru">Государственный научный центр Российской Федерации — Федеральный медицинский биофизический центр им. А.И. Бурназяна ФМБА России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-06-23" publication-format="electronic"><day>23</day><month>06</month><year>2026</year></pub-date><volume>25</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>77</fpage><lpage>82</lpage><history><date date-type="received" iso-8601-date="2026-01-14"><day>14</day><month>01</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-05-25"><day>25</day><month>05</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Andreev D.A., Kish A.A., Goloborodko E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Андреев Д.А., Киш А.А., Голобородько Е.В.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Andreev D.A., Kish A.A., Goloborodko E.V.</copyright-holder><copyright-holder xml:lang="ru">Андреев Д.А., Киш А.А., Голобородько Е.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/2078-1962/article/view/700717">https://journals.eco-vector.com/2078-1962/article/view/700717</self-uri><abstract xml:lang="en"><p><bold>INTRODUCTION. </bold>To date, the main diagnostic value of echocardiography is data on the work of the left ventricle.</p> <p><bold>AIM. </bold>Evaluation of an extended echocardiography protocol that is performed immediately after brief aerobic exercise and allows the detection of early (hidden) right ventricular (RV) dysfunction in highly trained athletes with overtraining syndrome (OTS).</p> <p><bold>MATERIALS AND METHODS. </bold>The study was conducted on the basis of the A.I. Burnazyan Federal State Budgetary Institution of the Federal Medical and Biological Agency of Russia in the period from July 2025 to December 2025 and examined 103 high-class athletes, divided into two groups: group 1 (<italic>n</italic> = 52) — healthy athletes and group 2 (<italic>n</italic> = 51) — athletes with overtraining. The protocol included standard resting transthoracic echocardiography and a repeat study immediately after bicycle ergometry with individually matched power (reference for heart rate — ~ 130–140 beats/min) and analysis of right ventricular parameters: RV FAC (right ventricular area change fraction), S' (systolic velocity of the tricuspid annulus movement) and TAPSE (systolic excursion of the tricuspid annulus); LVEF (left ventricular ejection fraction), GLS (global longitudinal deformity of the left ventricle) were additionally recorded.</p> <p><bold>RESULTS. </bold>At rest, no differences in pancreatic function between the groups were revealed. After loading, a significant decrease in the following indicators relative to the reference thresholds was recorded in the OTS group: RV FAC from 51.75 % to 31.00 %, S' from 13.45 cm/s to 7.65 cm/s, TAPSE from 20.94 mm to 14.61 mm, while in the “Healthy” group the indicators remained within the normal range.</p> <p><bold>DISCUSSION. </bold>As a result of the study, the use of an extended echocardiography protocol with mandatory post-exercise registration made it possible to identify latent dysfunction of the right ventricle, which is not recorded at rest. The parameters of the left ventricle in the studied groups remained within the normal range, which confirms the selectivity of damage to the right parts of the heart in the early stages of overtraining syndrome.</p> <p><bold>CONCLUSION. </bold>The data obtained confirm the diagnostic value of the post-exercise extended echocardiography protocol for the early detection of latent RV dysfunction in overtraining syndrome. The practical application of the proposed approach will make it possible to prescribe timely rehabilitation programs for the RV in the early stages of this pathology before the pronounced clinical manifestation.</p></abstract><trans-abstract xml:lang="ru"><p><bold>ВВЕДЕНИЕ.</bold> На сегодня основную диагностическую ценность эхокардиографии (Эхо-КГ) представляют данные о работе левого желудочка.</p> <p><bold>ЦЕЛЬ. </bold>Оценка расширенного протокола Эхо-КГ, который выполняется сразу после краткой аэробной нагрузки и позволяет выявлять раннюю (скрытую) дисфункцию правого желудочка (ПЖ) у высококвалифицированных спортсменов с синдромом перетренированности (СП).</p> <p><bold>МАТЕРИАЛЫ И МЕТОДЫ.</bold> Исследование проводилось на базе ФГБУ «Государственный научный центр Российской Федерации — Федеральный медицинский биофизический центр им. А.И. Бурназяна» ФМБА России с июля по декабрь 2025 г. Обследовано 103 спортсмена высокого класса, разделенных на две группы: группа 1 (<italic>n</italic> = 52) — здоровые спортсмены, группа 2 (<italic>n</italic> = 51) — спортсмены с перетренированностью. Протокол включал стандартную трансторакальную Эхо-КГ в покое, повторное исследование непосредственно после велоэргометрии с индивидуально подобранной мощностью (ориентир на частоту сердечных сокращений — ~ 130–140 уд/мин) и анализ правожелудочковых показателей: RV FAC (фракция изменения площади ПЖ), S' (систолическая скорость движения кольца трикуспидального клапана) и TAPSE (систолическая экскурсия трикуспидального кольца); дополнительно фиксировались LVEF (фракция выброса левого желудочка), GLS (глобальная продольная деформация левого желудочка).</p> <p><bold>РЕЗУЛЬТАТЫ.</bold> В покое различий по функции ПЖ между группами не выявлено. После нагрузки в группе с СП регистрировалось достоверное снижение относительно референсных порогов следующих показателей (RV FAC — с 51,75 % до 31,00 %, S' — с 13,45 см/с до 7,65 см/с, TAPSE — с 20,94 мм до 14,61 мм), тогда как в группе «Здоровые» показатели оставались в пределах нормы.</p> <p><bold>ОБСУЖДЕНИЕ.</bold> В результате проведенного исследования применение расширенного протокола Эхо-КГ с обязательной постнагрузочной регистрацией позволило выявить скрытую дисфункцию ПЖ, которая не фиксируется в покое. Показатели левого желудочка в исследуемых группах оставались в пределах нормы, что подтверждает избирательность поражения именно правых отделов сердца на ранних стадиях СП.</p> <p><bold>ЗАКЛЮЧЕНИЕ.</bold> Полученные данные подтверждают диагностическую значимость постнагрузочного расширенного протокола Эхо-КГ для раннего выявления скрытой дисфункции ПЖ при СП. Практическое применение предлагаемого подхода позволит своевременно назначать программы восстановительного лечения ПЖ на ранних стадиях данной патологии до выраженного клинического проявления.</p></trans-abstract><kwd-group xml:lang="en"><kwd>overtraining syndrome</kwd><kwd>elite athletes</kwd><kwd>right ventricle</kwd><kwd>echocardiography</kwd><kwd>post-exercise echocardiography</kwd><kwd>restorative treatment</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>синдром перетренированности</kwd><kwd>спортсмены высокой квалификации</kwd><kwd>правый желудочек</kwd><kwd>эхокардиография</kwd><kwd>постнагрузочная Эхо-КГ</kwd><kwd>восстановительное лечение</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Meeusen R., Duclos M., Foster C., et al. 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