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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">Doklady Biological Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Biological Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Науки о жизни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7389</issn><issn publication-format="electronic">3034-5057</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">693511</article-id><article-id pub-id-type="doi">10.31857/S2686738925040174</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">Systemic Rearrangement of the Heart Rhythm in the Process of Organism Aging. Spectral Analysis</article-title><trans-title-group xml:lang="ru"><trans-title>Системная перестройка сердечного ритма в процессе старения организма. Спектральный анализ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Grinevich</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Гриневич</surname><given-names>А. А.</given-names></name></name-alternatives><email>grin_aa@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chemeris</surname><given-names>N. K.</given-names></name><name xml:lang="ru"><surname>Чемерис</surname><given-names>Н. К.</given-names></name></name-alternatives><email>nikolai.chemeris@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Cell Biophysics of Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт биофизики клетки Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-08-15" publication-format="electronic"><day>15</day><month>08</month><year>2025</year></pub-date><volume>523</volume><issue>1</issue><issue-title xml:lang="en">VOL 523, NO (2025)</issue-title><issue-title xml:lang="ru">ТОМ 523, № (2025)</issue-title><fpage>479</fpage><lpage>484</lpage><history><date date-type="received" iso-8601-date="2025-10-16"><day>16</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-7389/article/view/693511">https://journals.eco-vector.com/2686-7389/article/view/693511</self-uri><abstract xml:lang="en"><p>Changes in the cardiovascular system are systemic during ageing. The aim of this work is to describe systemic regularities of changes in heart rate variability (HRV) parameters during ageing in healthy subjects. HRV of 73 healthy subjects aged 11–76 years from the PhysioNet database were used, divided into 3 groups: young 11–17 years, middle-aged 24–55 years and elderly 56–76 years. Using the Hilbert-Huang method and wavelet analysis, spectral curves of empirical HRV modes were obtained, for which maxima and their corresponding frequencies were determined. Nine modes were identified. A 2-fold decrease in autonomic control modes and, to a lesser extent, very low frequency modes (0.002–0.04 Hz) was found in the elderly compared to the young. Very low frequency HRV oscillations (&lt;0.001 Hz) did not change with age. The results obtained may serve as a basis for physiological interpretation of HRV regulation processes and may be useful in the development of controlled anti-aging therapy.</p></abstract><trans-abstract xml:lang="ru"><p>Изменения в сердечно-сосудистой системе носят системный характер при старении. Цель работы – описание системных закономерностей изменения параметров вариабельности сердечного ритма (ВСР) при старении организма здоровых испытуемых. В работе использовались ВСР 73 здоровых испытуемых 11–76 лет из базы данных PhysioNet с разделением на 3 группы: молодые 11–17 лет, среднего возраста 24–55 лет и пожилые 56–76 лет. С помощью метода Гильберта-Хуанга и вейвлет-анализа получали спектральные кривые эмпирических мод ВСР, для которых определяли максимумы и соответствующие им частоты. Было выявлено 9 мод. Было показано 2х кратное снижение мод вегетативного контроля и в меньшей степени очень низкочастотных мод (0.002–0.04 Гц) у пожилых в сравнении с молодыми. Сверхнизкочастотные колебания ВСР (&lt;0.001 Гц) при старении не изменялись. Полученные результаты могут служить основой для физиологической трактовки процессов регуляции ВСР и быть полезными при разработке контролируемой антивозрастной терапии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>cardiovascular system</kwd><kwd>heart rate variability</kwd><kwd>ageing</kwd><kwd>Hilbert-Huang method</kwd><kwd>wavelet analysis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>сердечно-сосудистая система</kwd><kwd>вариабельность сердечного ритма</kwd><kwd>старение</kwd><kwd>метод Гильберта-Хуанга</kwd><kwd>вейвлет-анализ</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Финансирование работы проводилось в рамках выполнения работ по госзаданиям ИБК РАН.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Шабалин В.Н., Шатохина С. Н. 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