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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">rpcardio</journal-id><journal-title-group><journal-title xml:lang="en">Rational Pharmacotherapy in Cardiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Рациональная Фармакотерапия в Кардиологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1819-6446</issn><issn pub-type="epub">2225-3653</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20996/1819-6446-2026-3257</article-id><article-id custom-type="edn" pub-id-type="custom">HKGPVW</article-id><article-id custom-type="elpub" pub-id-type="custom">rpcardio-3257</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="en"><subject>ORIGINAL STUDIES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group></article-categories><title-group><article-title>Fixed dose of сavutilide versus propranolol in patients with paroxysmal atrial fibrillation and flutter</article-title><trans-title-group xml:lang="ru"><trans-title>Применение фиксированной дозы кавутилида в сравнении с пропранололом при пароксизмах фибрилляции и трепетания предсердий</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4620-6181</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крымукова</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Krymukova</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крымукова Марина Анзоровна </p><p>ул. Академика Чазова, д.15а, Москва, 121552</p></bio><bio xml:lang="en"><p>Marina A. Krymukova </p><p>Akademika Chazova str., 15a, Moscow, 121552 </p></bio><email xlink:type="simple">krimukmarina@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/0000-0002-6086-6784</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Миронов</surname><given-names>Н. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Mironov</surname><given-names>N. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Миронов Николай Юрьевич  </p><p>ул. Академика Чазова, д.15а, Москва, 121552</p></bio><bio xml:lang="en"><p>Nikolay Yu. Mironov </p><p>Akademika Chazova str., 15a, Moscow, 121552 </p></bio><email xlink:type="simple">nikmir.7ko@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5532-6345</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юричева</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yuricheva</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юричева Юлия Александровна </p><p>ул. Академика Чазова, д.15а, Москва, 121552</p></bio><bio xml:lang="en"><p>Yulia A. Yuricheva </p><p>Akademika Chazova str., 15a, Moscow, 121552 </p></bio><email xlink:type="simple">yu-minkova@yandex.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/0009-0003-3479-219X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Свиридова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sviridova</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Свиридова Виктория Витальевна  </p><p>ул. Академика Чазова, д.15а, Москва, 121552</p></bio><bio xml:lang="en"><p>Victoria V. Sviridova </p><p>Akademika Chazova str., 15a, Moscow, 121552 </p></bio><email xlink:type="simple">sviridova_vika@invox.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/0000-0001-5418-7796</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соколов</surname><given-names>С. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Sokolov</surname><given-names>S. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соколов Сергей Федорович </p><p>ул. Академика Чазова, д.15а, Москва, 121552</p></bio><bio xml:lang="en"><p>Sergey F. Sokolov </p><p>Akademika Chazova str., 15a, Moscow, 121552 </p></bio><email xlink:type="simple">sokolov@astrocard-meditek.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/0000-0001-9913-9974</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Голицын</surname><given-names>С. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Golitsyn</surname><given-names>S. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Голицын Сергей Павлович </p><p>ул. Академика Чазова, д.15а, Москва, 121552</p></bio><bio xml:lang="en"><p>Sergey P. Golitsyn</p><p>Akademika Chazova str., 15a, Moscow, 121552 </p></bio><email xlink:type="simple">golitsyn@umail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр кардиологии им. акад. Е.И. Чазова» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Chazov National Medical Research Centre of Cardiology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>17</day><month>06</month><year>2026</year></pub-date><volume>22</volume><issue>2</issue><fpage>153</fpage><lpage>159</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Krymukova M.A., Mironov N.Y., Yuricheva Y.A., Sviridova V.V., Sokolov S.F., Golitsyn S.P., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Крымукова М.А., Миронов Н.Ю., Юричева Ю.А., Свиридова В.В., Соколов С.Ф., Голицын С.П.</copyright-holder><copyright-holder xml:lang="en">Krymukova M.A., Mironov N.Y., Yuricheva Y.A., Sviridova V.V., Sokolov S.F., Golitsyn S.P.</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.rpcardio.online/jour/article/view/3257">https://www.rpcardio.online/jour/article/view/3257</self-uri><abstract><sec><title>Aim</title><p>Aim. To evaluate the efficacy and safety of a single intravenous fixed dose of cavutilide 350 μg compared to propranolol in patients with paroxysms of atrial fibrillation (AF) and atrial flutter (AFl)</p></sec><sec><title>Material and methods</title><p>Material and methods. 70 patients with paroxysmal AF/AFl (36 women and 34 men, mean age 64.8±10.6 years) were divided into two groups. In the first group (n=35) a single intravenous injection of cavutilide 350 μg was administered to restore sinus rhythm (SR). In the second group (n=35) rate-control therapy with propranolol (10-20 mg per os every 3-4 hours) was performed. The main endpoints were SR restoration within 60-min and 24h, time to arrhythmia termination, and absence of AFib/AFl relapses. Safety was assessed by monitoring for major adverse cardiovascular events and proarrhythmia.</p></sec><sec><title>Results</title><p>Results. Within the first 60-min period SR was restored in 77.1% of patients in cavutilide group and in none of the patients in propranolol group (0; p&lt;0.001). SR was restored in 100% of patients with AFl (n=7) within 1 hour after cavutilide administration. After 24h SR was restored in 88.6% of patients in group of cavutilide versus 45.7% of patients in propranolol group (p&lt;0.001). Median time to SR restoration was 8,0 [5,0; 13,0] minutes in cavutilide group versus 375,0 [232,0; 915,0] minutes in propranolol group (p&lt;0.001). A decrease in heart rate of more than 10 beats/min was observed in 3 out of 4 patients (75%) who did not restore SR after administration of cavutilide, and in 28 out of 35 patients in propranolol group (75% vs 80%; p=0.41). There were 2 cases of asymptomatic decrease in heart rate &lt;50 beats/min. and 3 cases of transient prolongation of QT &gt;500 ms after cavutilide administration. In all 3 cases QT interval decreased to normal values within 1 hour. No AF/AFl recurrencies, proarrhythmia and major adverse cardiovascular events occurred in both groups.</p></sec><sec><title>Conclusion</title><p>Conclusion. A single fixed dose of cavutilid 350 μg is safe and highly effective for restoration of SR in paroxysmal AF/AFl, outperforming propranolol in likelihood of SR recovery, time to relief, and relapse prevention. Notably SR recovery after administration of cavutilide in 100% of patients with AFl, who are characterized by extremely low efficacy of other antiarrhythmic drugs. The high efficiency and rapid achievements of results, without significant adverse events, indicate the potential prospects for the use of a fixed dose of cavutilide 350 mg in outpatient settings.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цель</title><p>Цель. Определить эффективность и безопасность фиксированной дозы кавутилида 350 мкг по сравнению с пропранололом у пациентов с пароксизмами фибрилляции (ФП) и трепетания предсердий (ТП).</p></sec><sec><title>Материал и методы</title><p>Материал и методы. 70 пациентов (36 женщин и 34 мужчины, средний возраст 64,8±10,6 лет) с пароксизмальной формой ФП и ТП были распределены в 2 группы по 35 человек: первой группе проводилась внутривенная медикаментозная кардиоверсия однократным введением минимальной фиксированной дозы кавутилида 350 мкг, второй — назначался пропранолол 10-20 мг внутрь каждые 3-4 ч при необходимости. Изучаемые группы были сопоставимы по демографическим и клиническим показателям. Оценивалась эффективность восстановления синусового ритма (СР), снижение частоты сердечных сокращений (ЧСС), а также безопасность применения препаратов.</p></sec><sec><title>Результаты</title><p>Результаты. После введения кавутилида восстановление СР в течение 1 ч наблюдалось у 77,1% пациентов (27 из 35), в течение 24 ч — у 88,6% (31 из 35), медиана времени до восстановления составила 8 [5; 13] мин. У пациентов с ТП (n=7) СР был восстановлен в 100% случаев в течение 1 ч. В группе пропранолола восстановление СР в течение 1 ч наблюдения не произошло ни у одного из пациентов (0%; p&lt;0,001), а в течение 24 ч СР был восстановлен в 45,7% случаев (16 из 35; p&lt;0,001), медиана времени до восстановления СР — 375 мин [232; 915], p &lt;0,001. Снижение ЧСС более чем на 10 уд./мин отмечено у 3 из 4 пациентов, не восстановивших СР после введения кавутилида, и у 28 из 35 пациентов группы пропранолола (75% vs 80%; p=0,41). В группе кавутилида отмечены 2 случая бессимптомного снижения ЧСС &lt;50 уд./мин и 3 случая кратковременного удлинения интервала QT &gt;500 мс с последующей нормализацией в течение 1 ч. Значимых побочных эффектов и серьезных сердечно-сосудистых осложнений при применении обоих препаратов не было зарегистрировано.</p></sec><sec><title>Заключение</title><p>Заключение. Однократное введение фиксированной дозы кавутилида 350 мкг является эффективным и безопасным методом купирования пароксизмов ФП и ТП. Примечательно восстановление СР после введения кавутилида у 100% пациентов с ТП, для которых характерна крайне низкая эффективность других антиаритмических препаратов. Высокие эффективность и скорость достижения результата при отсутствии значимых нежелательных явлений указывают на потенциальные перспективы применения фиксированной дозы кавутилида 350 мкг в амбулаторных условиях.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>фибрилляция предсердий</kwd><kwd>трепетание предсердий</kwd><kwd>кардиоверсия</kwd><kwd>кавутилид</kwd><kwd>антиаритмические препараты</kwd><kwd>купирование</kwd><kwd>синусовый ритм</kwd><kwd>интервал QT</kwd></kwd-group><kwd-group xml:lang="en"><kwd>atrial fibrillation</kwd><kwd>atrial flutter</kwd><kwd>cardioversion</kwd><kwd>cavutilide</kwd><kwd>antiarrhythmic drugs</kwd><kwd>termination</kwd><kwd>sinus rhythm</kwd><kwd>QT interval</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">Piccini JP, Hammill BG, Sinner MF, et al. Incidence and prevalence of atrial fibrillation and associated mortality among Medicare beneficiaries, 1993-2007. Circ Cardiovasc Qual Outcomes. 2012;5(1):85-93. DOI: 10.1161/CIRCOUTCOMES.111.962688.</mixed-citation><mixed-citation xml:lang="en">Piccini JP, Hammill BG, Sinner MF, et al. Incidence and prevalence of atrial fibrillation and associated mortality among Medicare beneficiaries, 1993-2007. Circ Cardiovasc Qual Outcomes. 2012;5(1):85-93. DOI: 10.1161/CIRCOUTCOMES.111.962688.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Lippi G, Sanchis-Gomar F, Cervellin G. Global epidemiology of atrial fibrillation: An increasing epidemic and public health challenge. Int J Stroke. 2021;16(2):217- 21. DOI: 10.1177/1747493019897870. Erratum in: Int J Stroke. 2020;15(9):NP11-2. DOI: 10.1177/1747493020905964.</mixed-citation><mixed-citation xml:lang="en">Lippi G, Sanchis-Gomar F, Cervellin G. Global epidemiology of atrial fibrillation: An increasing epidemic and public health challenge. Int J Stroke. 2021;16(2):217- 21. DOI: 10.1177/1747493019897870. Erratum in: Int J Stroke. 2020;15(9):NP11-2. DOI: 10.1177/1747493020905964.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Kornej J, Börschel CS, Benjamin EJ, Schnabel RB. Epidemiology of Atrial Fibrillation in the 21st Century: Novel Methods and New Insights. Circ Res. 2020;127(1):4-20. DOI: 10.1161/CIRCRESAHA.120.316340.</mixed-citation><mixed-citation xml:lang="en">Kornej J, Börschel CS, Benjamin EJ, Schnabel RB. Epidemiology of Atrial Fibrillation in the 21st Century: Novel Methods and New Insights. Circ Res. 2020;127(1):4-20. DOI: 10.1161/CIRCRESAHA.120.316340.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Юричева Ю.А., Соколов С.Ф., Голицын С.П. и др. Новый антиаритмический препарат III класса ниферидил как эффективное средство восстановления синусового ритма при персистирующей форме мерцательной аритмии. Вестник аритмологии. 2012;(70):32-43.</mixed-citation><mixed-citation xml:lang="en">Yuricheva YuA, Sokolov SF, Golitsyn SP, et al. A novel III class antiarryhthmic, niferidil, as an effective medication for the sinus rhythm recovery in patients with persistent atrial fibrillation. Journal of Arrhythmology. 2012;(70):32-43. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Майков Е.Б., Юричева Ю.А., Миронов Н.Ю. и др. Рефралон (ниферидил) — новый антиаритмический препарат III класса для медикаментозной кардиоверсии персистирующей фибрилляции и трепетания предсердий. Терапевтический архив. 2015;87(1):3848. DOI: 10.17116/terarkh201587138-48.</mixed-citation><mixed-citation xml:lang="en">Maykov EB, Yuricheva YuA, Mironov NYu. et al. [Refralon (niferidil) is a new class III antiarrhythmic agent for pharmacological cardioversion for persistent atrial fibrillation and atrial flutter. Therapeutic Archive. 2015;87(1):38-48. (In Russ.) DOI: 10.17116/terarkh201587138-48.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Гаглоева Д.А., Миронов Н.Ю., Дзаурова Х.М. и др. Результаты проспективного рандомизированного исследования по сравнению эффективности и безопасности применения рефралона и амиодарона для восстановления синусового ритма у больных пароксизмальной формой фибрилляции и трепетания предсердий. Вестник аритмологии. 2024;31(1):63-70. DOI: 10.35336/VA-1289.</mixed-citation><mixed-citation xml:lang="en">Gagloeva DA, Mironov NYu, Dzaurova KhM, et al. Results of a prospective randomized study comparing efficacy and safety of refralon and amiodarone for cardioversion in patients with paroxysmal atrial fibrillation and flutter. Journal of Arrhythmology. 2024;31(1):63-70. (In Russ.) DOI: 10.35336/VA-1289.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Walpole SC, Prieto-Merino D, Edwards P, et al. The weight of nations: an estimation of adult human biomass. BMC Public Health. 2012;12:439. DOI: 10.1186/1471-2458-12-439.</mixed-citation><mixed-citation xml:lang="en">Walpole SC, Prieto-Merino D, Edwards P, et al. The weight of nations: an estimation of adult human biomass. BMC Public Health. 2012;12:439. DOI: 10.1186/1471-2458-12-439.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Pluymaekers NAHA, Dudink EAMP, Luermans JGLM, et al.; RACE 7 ACWAS Investigators. Early or Delayed Cardioversion in Recent-Onset Atrial Fibrillation. N Engl J Med. 2019;380(16):1499-508. DOI: 10.1056/NEJMoa1900353.</mixed-citation><mixed-citation xml:lang="en">Pluymaekers NAHA, Dudink EAMP, Luermans JGLM, et al.; RACE 7 ACWAS Investigators. Early or Delayed Cardioversion in Recent-Onset Atrial Fibrillation. N Engl J Med. 2019;380(16):1499-508. DOI: 10.1056/NEJMoa1900353.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Stiell IG, Sivilotti MLA, Taljaard M, et al. Electrical versus pharmacological cardioversion for emergency department patients with acute atrial fibrillation (RAFF2): a partial factorial randomised trial. Lancet. 2020;395(10221):339-49. DOI: 10.1016/S0140-6736(19)32994-0.</mixed-citation><mixed-citation xml:lang="en">Stiell IG, Sivilotti MLA, Taljaard M, et al. Electrical versus pharmacological cardioversion for emergency department patients with acute atrial fibrillation (RAFF2): a partial factorial randomised trial. Lancet. 2020;395(10221):339-49. DOI: 10.1016/S0140-6736(19)32994-0.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Merino JL, Tamargo J, Blomström-Lundqvist C, et al. Practical compendium of antiarrhythmic drugs: a clinical consensus statement of the European Heart Rhythm Association of the European Society of Cardiology. Europace. 2025;27(8):euaf076. DOI: 10.1093/europace/euaf076.</mixed-citation><mixed-citation xml:lang="en">Merino JL, Tamargo J, Blomström-Lundqvist C, et al. Practical compendium of antiarrhythmic drugs: a clinical consensus statement of the European Heart Rhythm Association of the European Society of Cardiology. Europace. 2025;27(8):euaf076. DOI: 10.1093/europace/euaf076.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Крымукова М.А., Миронов Н.Ю., Юричева Ю.А. и др. Применение фиксированной дозы кавутилида в сравнении с амиодароном при пароксизмах фибрилляции предсердий. Евразийский Кардиологический Журнал. 2025;(4):88-94. DOI: 10.38109/2225-1685-2025-4-88-94.</mixed-citation><mixed-citation xml:lang="en">Krymukova MA, Mironov NYu, Yuricheva YuA, et al. Cavutilide (fixed dose) versus amiodarone in paroxysmal atrial fibrillation. Eurasian heart journal. 2025;(4):88- 94. (In Russ.) DOI: 10.38109/2225-1685-2025-4-88-94.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Stambler BS, Wood MA, Ellenbogen KA, et al. Efficacy and safety of repeated intravenous doses of ibutilide for rapid conversion of atrial flutter or fibrillation. Ibutilide Repeat Dose Study Investigators. Circulation. 1996;94(7):1613-21. DOI: 10.1161/01.cir.94.7.1613.</mixed-citation><mixed-citation xml:lang="en">Stambler BS, Wood MA, Ellenbogen KA, et al. Efficacy and safety of repeated intravenous doses of ibutilide for rapid conversion of atrial flutter or fibrillation. Ibutilide Repeat Dose Study Investigators. Circulation. 1996;94(7):1613-21. DOI: 10.1161/01.cir.94.7.1613.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
