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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">bmjour</journal-id><journal-title-group><journal-title xml:lang="ru">Байкальский медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Baikal Medical Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-0715</issn><publisher><publisher-name>Irkutsk State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.57256/2949-0715-2026-5-2-34-40</article-id><article-id custom-type="elpub" pub-id-type="custom">bmjour-373</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 статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Original articles</subject></subj-group></article-categories><title-group><article-title>ВАРИАБЕЛЬНОСТЬ СЕРДЕЧНОГО РИТМА У ПАЦИЕНТОВ С ОБСЕССИВНО-КОМПУЛЬСИВНЫМ РАССТРОЙСТВОМ И ЗДОРОВЫХ ЛИЦ: ПОПЕРЕЧНОЕ ИССЛЕДОВАНИЕ</article-title><trans-title-group xml:lang="en"><trans-title>A CROSS-SECTIONAL STUDY TO COMPARE HEART RATE VARIABILITY IN PATIENTS OF OBSESSIVE–COMPULSIVE DISORDER AND HEALTHY CONTROLS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-7525-125X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кумар</surname><given-names>Локеш</given-names></name><name name-style="western" xml:lang="en"><surname>Kumar</surname><given-names>Lokesh</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший врач отделения физиологии</p></bio><bio xml:lang="en"><p>MD Physiology Senior Medical Officer, Department of Physiology</p></bio><email xlink:type="simple">loksh.x@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Верма</surname><given-names>Ашвани</given-names></name><name name-style="western" xml:lang="en"><surname>Verma</surname><given-names>Ashwani</given-names></name></name-alternatives><bio xml:lang="ru"><p>ординатор</p></bio><bio xml:lang="en"><p>MD Physiology, Medical Officer, Department of Physiology</p></bio><email xlink:type="simple">meraemail2@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шарма</surname><given-names>Харша Шри</given-names></name><name name-style="western" xml:lang="en"><surname>Sharma</surname><given-names>Harsha Shree</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач отделения физиологии</p></bio><bio xml:lang="en"><p>PG Resident, Department of Physiology</p></bio><email xlink:type="simple">hs.tycoon97@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дубе</surname><given-names>Амитабх</given-names></name><name name-style="western" xml:lang="en"><surname>Dube</surname><given-names>Amitabh</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший профессор кафедры физиологии</p></bio><bio xml:lang="en"><p>MD Physiology, Senior Professor, Department of Physiology</p></bio><email xlink:type="simple">amitabhdube786@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Медицинский колледж SMS</institution><country>Индия</country></aff><aff xml:lang="en"><institution>S.M.S. Medical College</institution><country>India</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Медицинский колледж SMS</institution><country>Индия</country></aff><aff xml:lang="en"><institution>SMS Medical College</institution><country>India</country></aff></aff-alternatives><aff xml:lang="en" id="aff-3"><institution>SMS Medical College</institution><country>India</country></aff><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>10</day><month>06</month><year>2026</year></pub-date><volume>5</volume><issue>2</issue><fpage>34</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кумар Л., Верма А., Шарма Х., Дубе А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Кумар Л., Верма А., Шарма Х., Дубе А.</copyright-holder><copyright-holder xml:lang="en">Kumar L., Verma A., Sharma H., Dube 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.bmjour.ru/jour/article/view/373">https://www.bmjour.ru/jour/article/view/373</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. Обсессивно-компульсивное расстройство все чаще связывают с дисрегуляцией вегетативной нервной системы, что может повышать риск сердечно-сосудистых заболеваний. Вариабельность сердечного ритма является неинвазивным маркером вегетативной нервной системы. Однако комплексная оценка вариабельности сердечного ритма у больных с обсессивно-компульсивным расстройством, не принимавших лекарства, остается ограниченной.</p></sec><sec><title>Цель</title><p>Цель. Сравнить параметры вариабельности сердечного ритма во временной, частотной и нелинейной областях у пациентов с обсессивно-компульсивным расстройством и здоровых контрольных лиц.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Исследованы 80 человек в возрасте 20–30 лет: 40 пациентов с обсессивно-компульсивным расстройством и 40 здоровых лиц. Вариабельность сердечного ритма оценивалась с помощью 5-минутной записи электрокардиографии в состоянии покоя в стандартизированных условиях.</p></sec><sec><title>Результаты</title><p>Результаты. У пациентов с обсессивно-компульсивным расстройством наблюдалось значительное снижение вариабельности сердечного ритма по сравнению со здоровыми пациентами. Параметры вариабельности сердечного ритма во временной области были значительно ниже в группе пациентов с обсессивно-компульсивным расстройством, что указывает на снижение парасимпатической модуляции сердечной деятельности. В частотной области общая мощность и нормированные единицы высокочастотного диапазона были значительно снижены у пациентов с обсессивно-компульсивным расстройством, в то время как мощность низкочастотного диапазона, мощность очень низкочастотного диапазона и отношение низких и высоких частот не показали статистически значимых различий между двумя группами. Нелинейный анализ вариабельности сердечного ритма выявил значительное снижение стандартного отклонения 2, отражающее нарушение динамики вариабельности сердечного ритма в долгосрочной перспективе, в то время как отношение 1 и 2 стандартных отклонений оставалось стабильным.</p></sec><sec><title>Заключение</title><p>Заключение. Пациенты с обсессивно-компульсивным расстройством демонстрируют значительный вегетативный дисбаланс со снижением парасимпатической активности и общей вариабельности сердечного ритма, уменьшением вегетативной гибкости, что подтверждает важную роль вегетативной регуляции при обсессивно-компульсивных расстройствах, подчеркивает потенциальную роль оценки вариабельности сердечного ритма в ранней стратификации сердечно-сосудистого риска и комплексной психиатрической оценке.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. Obsessive–compulsive disorder has been increasingly linked to autonomic nervous system dysregulation, which may confer elevated cardiovascular risk. Heart rate variability is a non-invasive marker of sympathovagal balance and autonomic flexibility. However, comprehensive heart rate variability assessment incorporating nonlinear indices in young, drug-naïve obsessive–compulsive disorder patients remains limited.</p></sec><sec><title>Aim</title><p>Aim. To compare time-domain, frequency-domain, and nonlinear heart rate variability parameters between patients with obsessive–compulsive disorder and healthy controls.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The present cross-sectional comparative study included 80 participants aged 20–30 years: 40 newly diagnosed obsessive–compulsive disorder patients and 40 age- and sex-matched healthy controls. Heart rate variability was assessed using a 5-minute resting electrocardiography recording under standardized conditions.</p></sec><sec><title>Results</title><p>Results: Patients with obsessive–compulsive disorder demonstrated a significant reduction in heart rate variability compared with healthy controls. Time-domain heart rate variability parameters were significantly lower in the obsessive–compulsive disorder group, indicating reduced parasympathetic cardiac modulation. In the frequency domain, total power and high-frequency normalized units were significantly decreased in obsessive–compulsive disorder patients, whereas low-frequency power, very-low-frequency power, and the Low Frequency/High Frequency ratio did not show statistically significant differences between the two groups. Nonlinear heart rate variability analysis revealed a significant reduction in Standard Deviation 2, reflecting impaired long-term heart rate variability dynamics, while the Standard Deviation 1/ Standard Deviation 2  ratio remained preserved.</p></sec><sec><title>Conclusion</title><p>Conclusion. Patients with obsessive–compulsive disorder demonstrates significant autonomic imbalance characterized by parasympathetic withdrawal, reduced overall heart rate variability, and diminished autonomic flexibility. These findings support impaired cardiovascular autonomic regulation as a consistent physiological feature of obsessive–compulsive disorder and highlight the potential role of heart rate variability assessment in early cardiovascular risk stratification and integrative psychiatric evaluation.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Обсессивно-компульсивное расстройство</kwd><kwd>вариабельность сердечного ритма</kwd><kwd>вегетативная дисфункция</kwd><kwd>парасимпатическая активность</kwd><kwd>симпатовагальный баланс</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Obsessive–compulsive disorder</kwd><kwd>Heart rate variability</kwd><kwd>Autonomic dysfunction</kwd><kwd>Parasympathetic activity</kwd><kwd>Sympathovagal balance</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">Valenza G., Citi L., Saul J.P., Barbieri R. 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