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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">Cardiac Arrhythmias</journal-id><journal-title-group><journal-title xml:lang="en">Cardiac Arrhythmias</journal-title><trans-title-group xml:lang="ru"><trans-title>Cardiac Arrhythmias</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>Cardiac Arrhythmias</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4284</issn><issn publication-format="electronic">2782-4233</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">643248</article-id><article-id pub-id-type="doi">10.17816/cardar643248</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</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">Arrhythmic phenotypes of cardiac laminopathies: a case series</article-title><trans-title-group xml:lang="ru"><trans-title>Аритмические проявления кардиоламинопатии (клинические наблюдения)</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title/></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9917-5932</contrib-id><contrib-id contrib-id-type="spin">8023-5308</contrib-id><name-alternatives><name xml:lang="en"><surname>Komissarova</surname><given-names>Svetlana M.</given-names></name><name xml:lang="ru"><surname>Комиссарова</surname><given-names>Светлана Михайловна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, главный научный сотрудник, профессор</p></bio><email>kom_svet@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1986-1367</contrib-id><contrib-id contrib-id-type="spin">2782-2270</contrib-id><name-alternatives><name xml:lang="en"><surname>Rineiska</surname><given-names>Nadiia M.</given-names></name><name xml:lang="ru"><surname>Ринейская</surname><given-names>Надежда Михайловна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), researcher</p></bio><bio xml:lang="ru"><p>канд. мед. наук, научный сотрудник</p></bio><email>nadya.rin@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4721-9109</contrib-id><contrib-id contrib-id-type="spin">5682-1497</contrib-id><name-alternatives><name xml:lang="en"><surname>Chakova</surname><given-names>Natalya N.</given-names></name><name xml:lang="ru"><surname>Чакова</surname><given-names>Наталья Николаевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology), leading researcher</p></bio><bio xml:lang="ru"><p>канд. биол. наук, ведущий научный сотрудник</p></bio><email>chaknat@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dubovik</surname><given-names>Anastasia Y.</given-names></name><name xml:lang="ru"><surname>Дубовик</surname><given-names>Анастасия Юрьевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>junior researcher</p></bio><bio xml:lang="ru"><p>младший научный сотрудник</p></bio><email>nastasia_gulko@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3566-7644</contrib-id><contrib-id contrib-id-type="spin">1093-1793</contrib-id><name-alternatives><name xml:lang="en"><surname>Niyazova</surname><given-names>Svetlana S.</given-names></name><name xml:lang="ru"><surname>Ниязова</surname><given-names>Светлана Сергеевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>junior researcher</p></bio><bio xml:lang="ru"><p>младший научный сотрудник</p></bio><email>kruglenko_sveta@tut.by</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3634-0616</contrib-id><name-alternatives><name xml:lang="en"><surname>Sevruk</surname><given-names>Tatiana V.</given-names></name><name xml:lang="ru"><surname>Севрук</surname><given-names>Татьяна Васильевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Head of the Ultrasound Diagnostics Department</p></bio><bio xml:lang="ru"><p>заведующий отделением ультразвуковой диагностики</p></bio><email>kom_svet@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Republican Scientific and Practical Centre «Cardiology»</institution></aff><aff><institution xml:lang="ru">Республиканский научно-практический центр «Кардиология»</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Genetics and Cytology of Belarus National Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт генетики и цитологии Национальной академии наук Беларуси</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-03-12" publication-format="electronic"><day>12</day><month>03</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-11-20" publication-format="electronic"><day>20</day><month>11</month><year>2024</year></pub-date><volume>4</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>25</fpage><lpage>34</lpage><history><date date-type="received" iso-8601-date="2024-12-20"><day>20</day><month>12</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-03-12"><day>12</day><month>03</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2024,</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</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-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/cardar/article/view/643248">https://journals.eco-vector.com/cardar/article/view/643248</self-uri><abstract xml:lang="en"><p>This article conveys clinical cases of patients with cardiac laminopathy caused by mutations in the <italic>LMNA</italic> gene, the early manifestations of which were supraventricular, ventricular tachyarrhythmias and conduction disorders in the absence of myocardial structural changes. Moreover, it is shown the evolution of rhythm and conduction disturbances during the follow-up period, as well as the tendency of mutation carriers in the <italic>LMNA</italic> gene to develop life-threatening ventricular tachyarrhythmias and conduction disorders with a high risk of sudden cardiac death. Furthermore, herein are provided key recommendations of European and American experts regarding the concept of distinguishing laminopathies for mandatory molecular genetic testing, since carriers of <italic>LMNA</italic> mutations are associated with a poor prognosis. The data obtained confirm the importance of conducting a molecular genetic study using high-throughput sequencing of genes associated with hereditary rhythm disorders, including the <italic>LMNA</italic> gene, in the presence of clinical manifestations such as syncope, conduction disorders (atrioventricular block, sinus node dysfunction), supraventricular and ventricular tachyarrhythmias in combination with a family history, notably in the absence of structural heart diseases. Timely molecular genetic testing may facilitate the appropriate treatment including a cardioverter-defibrillator implantation.</p></abstract><trans-abstract xml:lang="ru"><p>Представлены клинические наблюдения двух пациентов с кардиоламинопатией, обусловленной мутациями в гене <italic>LMNA</italic>, ранними проявлениями которой были наджелудочковые, желудочковые нарушения ритма и проводимости при отсутствии структурных изменений в сердце. Показана эволюция нарушений ритма и проводимости за период наблюдения, склонность носителей мутаций в гене <italic>LMNA</italic> к развитию злокачественных желудочковых тахиаритмий и нарушений проводимости с высоким риском внезапной сердечной смерти. Также приведены основные положения европейских и американских экспертов относительно концепции выделения ламиновых фенотипов для обязательного молекулярно-генетического тестирования, так как носители мутаций <italic>LMNA</italic> ассоциированы с плохим прогнозом. Полученные данные подтверждают важность проведения молекулярно-генетического исследования методом высокопроизводительного секвенирования генов, ассоциированных с наследственными нарушениями ритма, включая ген <italic>LMNA</italic>, при наличии таких клинических признаков, как синкопальные состояния, нарушения проводимости (атриовентрикулярные блокады, дисфункция синусового узла), суправентрикулярные и желудочковые тахиаритмии в сочетании с семейным анамнезом даже при отсутствии структурных нарушений миокарда, для верификации диагноза кардиоламинопатии и определения стратегии лечения. Своевременное проведение молекулярно-генетического тестирования позволяет определить оптимальную тактику лечения и необходимость профилактической имплантации кардиовертера-дефибриллятора.</p></trans-abstract><trans-abstract xml:lang="zh"><p/></trans-abstract><kwd-group xml:lang="en"><kwd>laminopathy</kwd><kwd>LMNA gene</kwd><kwd>sudden cardiac death</kwd><kwd>supraventricular and ventricular tachyarrhythmias</kwd><kwd>conduction disorders</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ламинопатия</kwd><kwd>ген LMNA</kwd><kwd>внезапная сердечная смерть</kwd><kwd>наджелудочковые и желудочковые тахиаритмии</kwd><kwd>нарушения проводимости</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ditaranto R, Boriani G, Biffi M, et al. Differences in cardiac phenotype and natural history of laminopathies with and without neuromuscular onset. 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