<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">cardiovascular</journal-id><journal-title-group><journal-title xml:lang="ru">Кардиоваскулярная терапия и профилактика</journal-title><trans-title-group xml:lang="en"><trans-title>Cardiovascular Therapy and Prevention</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1728-8800</issn><issn pub-type="epub">2619-0125</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15829/1728-8800-2022-3485</article-id><article-id custom-type="elpub" pub-id-type="custom">cardiovascular-3485</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>МЕТОДЫ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH METHODS</subject></subj-group></article-categories><title-group><article-title>Динамика уровня NT-proBNP у пациентов с синусовой тахикардией, перенесших новую коронавирусную инфекцию COVID-19</article-title><trans-title-group xml:lang="en"><trans-title>Changes in NT-proBNP levels in patients with sinus tachycardia after COVID-19</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0758-5609</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Подзолков</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Podzolkov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор медицинских наук, профессор, заведующий кафедрой факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">Podzolkov@list.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/0000-0002-2699-1610</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Брагина</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Bragina</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор медицинских наук, профессор кафедры факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">anna.bragina@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/0000-0001-9536-8307</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тарзиманова</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tarzimanova</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор медицинских наук, профессор кафедры факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">Tarzimanova@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/0000-0003-3076-4231</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Варгина</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Vargina</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат медицинских наук, доцент кафедры факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">tsv3004@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/0000-0002-2129-818X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Огибенина</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Ogibenina</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Заведующий приемным отделением Университетской клинической больницы № 4.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">ogibenina_e_s@staff.sechenov.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/0000-0001-9722-6097</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шведов</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shvedov</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">shvedov@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/0000-0002-4830-624X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Быкова</surname><given-names>Е. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Bykova</surname><given-names>E. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">ktrnbykva@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/0000-0002-9738-1801</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванников</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivannikov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры факультетской терапии № 2 Института клинической медицины им. Н. В. Склифосовского.</p><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">ivannikov_a95@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАОУ ВО Первый Московский государственный медицинский университет им. И.М. Сеченова, Минздрав России (Сеченовский Университет)</institution></aff><aff xml:lang="en"><institution>I.M. Sechenov First Moscow State Medical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>17</day><month>01</month><year>2023</year></pub-date><volume>21</volume><issue>12</issue><fpage>3485</fpage><lpage>3485</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Подзолков В.И., Брагина А.Е., Тарзиманова А.И., Варгина Т.С., Огибенина Е.С., Шведов И.И., Быкова Е.Е., Иванников А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Подзолков В.И., Брагина А.Е., Тарзиманова А.И., Варгина Т.С., Огибенина Е.С., Шведов И.И., Быкова Е.Е., Иванников А.А.</copyright-holder><copyright-holder xml:lang="en">Podzolkov V.I., Bragina A.E., Tarzimanova A.I., Vargina T.S., Ogibenina E.S., Shvedov I.I., Bykova E.E., Ivannikov A.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://cardiovascular.elpub.ru/jour/article/view/3485">https://cardiovascular.elpub.ru/jour/article/view/3485</self-uri><abstract><sec><title>Цель</title><p>Цель. Оценить динамику концентрации N-концевого предшественника мозгового натрийуретического пептида (NT-proBNP) у пациентов с синусовой тахикардией, перенесших новую коронавирусную инфекцию COVID-19 (COronaVirus Disease 2019), на фоне лечения ивабрадином в монотерапии или в комбинации с β-адреноблокаторами (БАБ) по сравнению с монотерапией БАБ.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. В рандомизированное сравнительное исследование были включены 90 пациентов, выписанных из стационара после острого периода COVID-19. Основная группа (n=60), получавшая в дополнение к стандартной терапии ивабрадин в монотерапии или в сочетании с БАБ, контрольная (n=30), получавшая стандартную терапию в сочетании с БАБ; срок наблюдения — 24 нед. Концентрацию NT-proBNP в сыворотке крови определяли путем иммуноферментного анализа на первом и последнем визите (0 и 24 нед.). Статистическую обработку проводили с использованием программы STATISTICA 8.0. Уровень статистической значимости — р&lt;0,05. Результаты. На фоне проводимого лечения отмечено достоверное снижение частоты сердечных сокращений (ЧСС) и концентрации NT-proBNP в обеих группах. Частота достижения максимально рекомендуемых доз БАБ составила: 9,1% в основной группе и 20% в контрольной группе. Среди лиц с недостижением максимально рекомендуемых доз БАБ показатель ЧСС и концентрация NTproBNP оказались достоверно выше в контрольной группе: 72 [66; 75] vs 68 [66; 75] уд./мин (р=0,028) и 55,5 [47,3; 88,8] vs 43,3 [31,0; 55,5] пг/мл, соответственно (р=0,041).</p></sec><sec><title>Заключение</title><p>Заключение. Показано, что терапия ивабрадином и БАБ способствует снижению уровня NT-proBNP на фоне уменьшения ЧСС у пациентов, перенесших новую коронавирусную инфекцию COVID-19, причем ивабрадин позволяет достичь более выраженного снижения ЧСС и уровня NT-proBNP у пациентов при недостижении максимально рекомендуемых доз БАБ.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. To evaluate the changes of the N-terminal pro-brain natriuretic peptide (NT-proBNP) concentration in patients with sinus tachycardia after coronavirus disease 2019 (COVID-19) during ivabradine monotherapy or in combination with β-blockers (BBs) compared to BB monotherapy.</p></sec><sec><title>Material and methods</title><p>Material and methods. This randomized comparative study included 90 patients discharged from the hospital after an acute period of COVID-19. The main group (n=60) included patients who received ivabradine monotherapy or in combination with BB in addition to standard therapy, while the control group (n=30) — standard therapy in combination with BB. The follow-up period lasted 24 weeks. Serum NT-proBNP concentration was determined by enzyme immunoassay at the first and last visit (0 and 24 weeks). Statistical processing was performed using STATISTICA 8.0 software. The level of statistical significance was p&lt;0,05.</p></sec><sec><title>Results</title><p>Results. A significant decrease in heart rate (HR) and NT-proBNP concentration was noted in both groups. The achievement rate of maximum recommended BB doses was 9,1% in the main group and 20% in the control group. Among individuals who did not achieve the maximum recommended doses of BB, the HR and NT-proBNP concentration were significantly higher in the control group as follows: 72 [66; 75] vs 68 [66; 75] bpm (p=0,028) and 55,5 [47,3; 88,8] vs 43,3 [31,0; 55,5] pg/ml, respectively (p=0,041).</p></sec><sec><title>Conclusion</title><p>Conclusion. We showed that therapy with ivabradine and betablockers helps to reduce the level of NT-proBNP against the background of HR decrease in patients after COVID-19, and ivabradine allows to achieve a more pronounced decrease in heart rate and NT-proBNP level in patients with failure to achieve the maximum recommended BB doses.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>новая коронавирусная инфекция</kwd><kwd>COVID-19</kwd><kwd>постковидная тахикардия</kwd><kwd>синусовая тахикардия</kwd><kwd>ивабрадин</kwd><kwd>NT-proBNP</kwd><kwd>натриуретический пептид</kwd><kwd>ингибитор If-каналов клеток синоатриального узла</kwd></kwd-group><kwd-group xml:lang="en"><kwd>novel coronavirus infection</kwd><kwd>COVID-19</kwd><kwd>post-covid tachycardia</kwd><kwd>sinus tachycardia</kwd><kwd>ivabradine</kwd><kwd>NT-proBNP</kwd><kwd>natriuretic peptide</kwd><kwd>sinoatrial cell If channel blocker</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Публикация статьи поддержана компанией Гедеон Рихтер, что никоим образом не повлияло на собственное мнение авторов</funding-statement><funding-statement xml:lang="en">The publication was supported by the Gedeon Richter company, which did not affected the authors’ own opinion</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Шляхто Е. В., Конради А. О., Арутюнов Г. П. и др. Руководство по диагностике и лечению болезней системы кровообращения в контексте пандемии COVID-19. Российский кардиологический журнал. 2020;25(3):3801. doi:10.15829/1560-4071-2020-3-3801.</mixed-citation><mixed-citation xml:lang="en">Shlyakho EV, Konradi AO, Arutyunov GP, et al. Guidelines for the diagnosis and treatment of circulatory diseases in the context of the COVID-19 pandemic. Russian Journal of Cardiology. 2020;25(3):3801. (In Russ.) doi:10.15829/1560-4071-2020-3-3801.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Подзолков В.И., Брагина А. Е., Тарзиманова А. И. и др. Постковидный синдром и тахикардия: теоретические основы и опыт лечения. Рациональная фармакотерапия в кардиологии. 2021;17(2):256-62. doi:10.20996/1819-6446-2021-04-08.</mixed-citation><mixed-citation xml:lang="en">Podzolkov VI, Bragina AE, Tarzimanova AI, et al. Post-COVID Syndrome and Tachycardia: Theoretical Base and Treatment Experience. Rational Pharmacotherapy in Cardiology. 2021;17(2):256-62. (In Russ.) doi:10.20996/1819-6446-2021-04-08.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Jadhav K, Jariwala P. ‘Ivabradin’ versus ‘Carvedilol’ in the management of Post-COVID-19 palpitation with sinus tachycardia. Indian Heart J. 2020;72:S33. doi:10.1016/j.ihj.2020.11.092.</mixed-citation><mixed-citation xml:lang="en">Jadhav K, Jariwala P. ‘Ivabradin’ versus ‘Carvedilol’ in the management of Post-COVID-19 palpitation with sinus tachycardia. Indian Heart J. 2020;72:S33. doi:10.1016/j.ihj.2020.11.092.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Ståhlberg M, Reistam U, Fedorowski A, et al. Post-COVID-19 Tachycardia Syndrome: A Distinct Phenotype of Post-Acute COVID-19 Syndrome. Am J Med. 2021;134(12):1451-6. doi:10.1016/j.amjmed.2021.07.004.</mixed-citation><mixed-citation xml:lang="en">Ståhlberg M, Reistam U, Fedorowski A, et al. Post-COVID-19 Tachycardia Syndrome: A Distinct Phenotype of Post-Acute COVID-19 Syndrome. Am J Med. 2021;134(12):1451-6. doi:10.1016/j.amjmed.2021.07.004.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Caro-Codón J, Rey JR, Buño A, et al. Characterization of NTproBNP in a large cohort of COVID-19 patients. Eur J Heart Fail. 2021;23(3):456-64. doi:10.1002/ejhf.2095.</mixed-citation><mixed-citation xml:lang="en">Caro-Codón J, Rey JR, Buño A, et al. Characterization of NTproBNP in a large cohort of COVID-19 patients. Eur J Heart Fail. 2021;23(3):456-64. doi:10.1002/ejhf.2095.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Cao R, Bai Y, Xu R, et al. Association between resting heart rate and N-terminal pro-brain natriuretic peptide in a communitybased population study in Beijing. Clin Interv Aging. 2014;10:5560. doi:10.2147/CIA.S66971.</mixed-citation><mixed-citation xml:lang="en">Cao R, Bai Y, Xu R, et al. Association between resting heart rate and N-terminal pro-brain natriuretic peptide in a communitybased population study in Beijing. Clin Interv Aging. 2014;10:5560. doi:10.2147/CIA.S66971.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Подзолков В. И., Тарзиманова А. И., Брагина А. Е. и др. Поражение сердечно-сосудистой системы у больных с коронавирусной инфекцией SARS-CoV-2. Часть 1: предикторы развития неблагоприятного прогноза. Рациональная Фармакотерапия в Кардиологии. 2021;17(6):825-30. doi:10.20996/1819-6446-2021-11-03.</mixed-citation><mixed-citation xml:lang="en">Podzolkov VI, Tarzimanova AI, Bragina AE, et al. Damage to the Cardiovascular System in Patients with SARS-CoV-2 Coronavirus Infection. Part 1: предикторы развития неблагоприятного прогноза. Rational Pharmacotherapy in Cardiology. 2021;17(6):825-30. (In Russ.) doi:10.20996/1819-6446-2021-11-03.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Подзолков В. И., Брагина А. Е., Тарзиманова А. И. и др. Сравнительная эффективность ивабрадина и бета-блокаторов в коррекции тахикардии у пациентов, перенесших COVID-19. Кардиоваскулярная терапия и профилактика. 2022;21(7):3330. doi:10.15829/1728-8800-2022-3330.</mixed-citation><mixed-citation xml:lang="en">Podzolkov VI, Bragina AE, Tarzimanova AI, et al. Comparative efficacy of ivabradine and beta-blockers in the treatment of tachycardia in patients after COVID-19. Cardiovascular Therapy and Prevention. 2022;21(7):3330. (In Russ.) doi:10.15829/1728-8800-2022-3330.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Romero-Sánchez CM, Díaz-Maroto I, Fernández-Díaz E, et al. Neurologic manifestations in hospitalized patients with COVID-19: The ALBACOVID registry. Neurology. 2020;95(8):e1060-70. doi:10.1212/WNL.0000000000009937.</mixed-citation><mixed-citation xml:lang="en">Romero-Sánchez CM, Díaz-Maroto I, Fernández-Díaz E, et al. Neurologic manifestations in hospitalized patients with COVID-19: The ALBACOVID registry. Neurology. 2020;95(8):e1060-70. doi:10.1212/WNL.0000000000009937.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Dogheim GM, Khairat I, Omran GA, et al. Clinical comparative study assessing the effect of ivabradine on neopterin and NT-Pro BNP against standard treatment in chronic heart failure patients. Eur J Clin Pharmacol. 2022;78:943-54. doi:10.1007/s00228-022-03290-6.</mixed-citation><mixed-citation xml:lang="en">Dogheim GM, Khairat I, Omran GA, et al. Clinical comparative study assessing the effect of ivabradine on neopterin and NT-Pro BNP against standard treatment in chronic heart failure patients. Eur J Clin Pharmacol. 2022;78:943-54. doi:10.1007/s00228-022-03290-6.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Zugck C, Martinka P, Stöckl G. Ivabradine treatment in a chronic heart failure patient cohort: symptom reduction and improvement in quality of life in clinical practice. Adv Ther. 2014;31(9):961-74. doi:10.1007/s12325-014-0147-3.</mixed-citation><mixed-citation xml:lang="en">Zugck C, Martinka P, Stöckl G. Ivabradine treatment in a chronic heart failure patient cohort: symptom reduction and improvement in quality of life in clinical practice. Adv Ther. 2014;31(9):961-74. doi:10.1007/s12325-014-0147-3.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Ptaszynski P, Kaczmarek K, Ruta J, et al. Metoprolol succinate vs. ivabradine in the treatment of inappropriate sinus tachycardia in patients unresponsive to previous pharmacological therapy. Europace. 2013;15(1):116-21. doi:10.1093/europace/eus204.</mixed-citation><mixed-citation xml:lang="en">Ptaszynski P, Kaczmarek K, Ruta J, et al. Metoprolol succinate vs. ivabradine in the treatment of inappropriate sinus tachycardia in patients unresponsive to previous pharmacological therapy. Europace. 2013;15(1):116-21. doi:10.1093/europace/eus204.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Calò L, Rebecchi M, Sette A, et al. Efficacy of ivabradine administration in patients affected by inappropriate sinus tachycardia. Heart Rhythm. 2010;7(9):1318-23. doi:10.1016/j.hrthm.2010.05.034.</mixed-citation><mixed-citation xml:lang="en">Calò L, Rebecchi M, Sette A, et al. Efficacy of ivabradine administration in patients affected by inappropriate sinus tachycardia. Heart Rhythm. 2010;7(9):1318-23. doi:10.1016/j.hrthm.2010.05.034.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Hidalgo FJ, Anguita M, Castillo JC, et al. Effect of early treatment with ivabradine combined with beta-blockers versus beta-blockers alone in patients hospitalized with heart failure and reduced left ventricular ejection fraction (ETHICAHF): A randomized study. Int J Cardiol. 2016;217:7-11. doi:10.1016/j.ijcard.2016.04.136.</mixed-citation><mixed-citation xml:lang="en">Hidalgo FJ, Anguita M, Castillo JC, et al. Effect of early treatment with ivabradine combined with beta-blockers versus beta-blockers alone in patients hospitalized with heart failure and reduced left ventricular ejection fraction (ETHICAHF): A randomized study. Int J Cardiol. 2016;217:7-11. doi:10.1016/j.ijcard.2016.04.136.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Hori M, Imamura T, Nakamura M, et al. Implication of Ivabradine in Up-titrating Beta-blocker in a Patient with Advanced Heart Failure. Intern Med. 2021;60(6):897-900. doi:10.2169/internalmedicine.6061-20.</mixed-citation><mixed-citation xml:lang="en">Hori M, Imamura T, Nakamura M, et al. Implication of Ivabradine in Up-titrating Beta-blocker in a Patient with Advanced Heart Failure. Intern Med. 2021;60(6):897-900. doi:10.2169/internalmedicine.6061-20.</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>
