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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">vestar</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник аритмологии</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of Arrhythmology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8641</issn><issn pub-type="epub">2658-7327</issn><publisher><publisher-name>НАО «Инкарт»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35336/VA-2021-2-37-43</article-id><article-id custom-type="elpub" pub-id-type="custom">vestar-959</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>КЛИНИЧЕСКИЕ НАБЛЮДЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CASE REPORTS</subject></subj-group></article-categories><title-group><article-title>Синдром приобретенного удлинения интервала QT, проявляющийся в первом комплексе после желудочковой экстрасистолы</article-title><trans-title-group xml:lang="en"><trans-title>Acquired long QT  syndrome, manifesting in the first complex after a ventricular extrasystole</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9425-0315</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кононенко</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kononenko</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кононенко Оксана Витальевна</p><p>Новосибирск, ул. Залесского 6, к. 8</p></bio><bio xml:lang="en"><p>Kononenko Oxana</p><p>Novosibirsk, 6, c. 8, Zalesskiy str</p></bio><email xlink:type="simple">kononenko250171@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/0000-0003-1272-560X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зенин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zenin</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новосибирск, ул. Залесского 6, к. 8</p></bio><bio xml:lang="en"><p>Novosibirsk, 6, c. 8, Zalesskiy str</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8766-4867</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федосеенко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedoseenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новосибирск, ул. Залесского 6, к. 8</p></bio><bio xml:lang="en"><p>Novosibirsk, 6, c. 8, Zalesskiy str</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4400-0814</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Феликов</surname><given-names>И. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Felikov</surname><given-names>I. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новосибирск, ул. Залесского 6, к. 8</p></bio><bio xml:lang="en"><p>Novosibirsk, 6, c. 8, Zalesskiy str</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8638-0937</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пятаева</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pyataeva</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новосибирск, ул. Залесского 6, к. 8</p></bio><bio xml:lang="en"><p>Novosibirsk, 6, c. 8, Zalesskiy str</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0137-4058</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ермолаева</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ermolaeva</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новосибирск, ул. Залесского 6, к. 8</p></bio><bio xml:lang="en"><p>Novosibirsk, 6, c. 8, Zalesskiy str</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ГБУЗ НСО «Новосибирский областной клинический кардиологический диспансер»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>SPHB Novosibirsk Regional Clinical Cardiologic Dispensary</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>01</day><month>09</month><year>2021</year></pub-date><volume>28</volume><issue>2</issue><fpage>37</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кононенко О.В., Зенин С.А., Федосеенко А.В., Феликов И.М., Пятаева О.В., Ермолаева М.С., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Кононенко О.В., Зенин С.А., Федосеенко А.В., Феликов И.М., Пятаева О.В., Ермолаева М.С.</copyright-holder><copyright-holder xml:lang="en">Kononenko O.V., Zenin S.A., Fedoseenko A.V., Felikov I.M., Pyataeva O.V., Ermolaeva M.S.</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://vestar.elpub.ru/jour/article/view/959">https://vestar.elpub.ru/jour/article/view/959</self-uri><abstract><p>Представлено клиническое наблюдение удлинения интервала QT, проявлявшееся в первом синусовом комплексе, следующем за желудочковой экстрасистолой.</p></abstract><trans-abstract xml:lang="en"><p>A case report of unusual QT interval prolongation after ventricular premature beat is presented.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>синдром удлиненного интервала QT</kwd><kwd>желудочковая экстрасистолия</kwd><kwd>калиевые каналы</kwd><kwd>прогноз</kwd></kwd-group><kwd-group xml:lang="en"><kwd>QT interval prolongation</kwd><kwd>ventricular premature beat</kwd><kwd>potassium channels</kwd><kwd>prognosis</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">Kallergis EM, Goudis CA, Simantirakis EN, et al. 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