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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">medalphabet</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский алфавит</journal-title><trans-title-group xml:lang="en"><trans-title>Medical alphabet</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2078-5631</issn><issn pub-type="epub">2949-2807</issn><publisher><publisher-name>ООО «Альфмед»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33667/2078-5631-2023-32-27-34</article-id><article-id custom-type="elpub" pub-id-type="custom">medalphabet-3433</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Трехмерная векторкардиография в диагностике полной блокады левой ножки пучка Гиса</article-title><trans-title-group xml:lang="en"><trans-title>Three-dimensional vector ECG analysis in the diagnosis of the left bundle branch block</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Терегулов</surname><given-names>Ю. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Teregulov</surname><given-names>Yu. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Терегулов Юрий Эмильевич, д.м.н., доцент, заведующий кафедрой функциональной диагностики</p><p>Казань.</p></bio><bio xml:lang="en"><p>Teregulov Yu. E., Head of the Department of Functional Diagnostics, Assistant Professor of the Department of hospital therapy, MD</p><p>Kazan.</p></bio><email xlink:type="simple">tereg2@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Максимова</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Maksimova</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максимова Мария Сергеевна, к.м.н., доцент кафедры функциональной диагностики</p><p>Казань.</p></bio><bio xml:lang="en"><p>Maksimova M. S., Assistant Professor of the Department of Functional Diagnostics, PhD</p><p>Kazan.</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Терегулова</surname><given-names>Е. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Teregulov</surname><given-names>E. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Терегулова Елена Теодоровна, к.м.н., доцент кафедры функциональной диагностики</p><p>Казань.</p></bio><bio xml:lang="en"><p>Teregulova E. T., Assistant Professor of the Department of Functional Diagnostics, PhD</p><p>Kazan.</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чувашаева</surname><given-names>Ф. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Chuvashayeva</surname><given-names>F. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чувашаева Фарида Рамзиевна, ассистент кафедры функциональной диагностики</p><p>Казань.</p></bio><bio xml:lang="en"><p>Chuvashayeva F. R., Assistant Lecturer of the Department of Functional Diagnostics</p><p>Kazan.</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Терегулов</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Teregulov</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Терегулов Андрей Юрьевич, к.м.н., доцент кафедры хирургических болезней постдипломного образования института фундаментальной медицины и биологии КФУ</p><p>Казань.</p></bio><bio xml:lang="en"><p>Teregulov A. Yu., Assistant Professor, Department of Surgical Diseases of Postgraduate Education</p><p>Kazan.</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Милютина</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Milyutina</surname><given-names>O. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Милютина Ольга Игоревна, врач-радиолог</p><p>Москва.</p></bio><bio xml:lang="en"><p>Milyutina О. I., radiologist</p><p>Moscow.</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Милютина</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Milyutina</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Милютина Ирина Игоревна, лаборант кафедры функциональной диагностики</p><p>Казань.</p></bio><bio xml:lang="en"><p>Milyutina I. I., laboratory assistant Department of Functional Diagnostics</p><p>Kazan.</p></bio><xref ref-type="aff" rid="aff-6"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанская государственная медицинская академия — филиал ФГБОУ ДПО РМАНПО Минздрава России; ФГБОУ ВО «Казанский государственный медицинский университет» Минздрава России; Государственное автономное учреждение здравоохранения «Республиканская клиническая больница» Министерства здравоохранения Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>KSMA-Branch Campus of the FSBEI FPE RMACPE MOH Russia; FSBEI HE Kazan SMU MOH Russia; Republican Clinical Hospital Ministry of health Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Казанская государственная медицинская академия — филиал ФГБОУ ДПО РМАНПО Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>KSMA-Branch Campus of the FSBEI FPE RMACPE MOH Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Казанская государственная медицинская академия — филиал ФГБОУ ДПО РМАНПО Минздрава России; Государственное автономное учреждение здравоохранения «Республиканская клиническая больница» Министерства здравоохранения Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>KSMA-Branch Campus of the FSBEI FPE RMACPE MOH Russia; Republican Clinical Hospital Ministry of Health Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>ФГАОУ ВО «Казанский (Приволжский) федеральный университет»; Государственное автономное учреждение здравоохранения «Республиканская клиническая больница» Министерства здравоохранения Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan Federal University; Republican Clinical Hospital Ministry of health Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Государственной бюджетное учреждение здравоохранения «Детская городская клиническая больница № 13 им. Н. Ф. Филатова» Департамента здравоохранения г. Москвы</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State budgetary health care institution “Children’s City Clinical Hospital No. 13 named after N. F. Filatov” of the Department of Health of Moscow</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-6"><aff xml:lang="ru"><institution>Казанская государственная медицинская академия — филиал ФГБОУ ДПО РМАНПО Минздрава России; Государственное автономное учреждение здравоохранения «Республиканская клиническая больница» Министерства здравоохранения Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>KSMA-Branch Campus of the FSBEI FPE RMACPE MOH Russia; Republican Clinical Hospital Ministry of health Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>08</day><month>12</month><year>2023</year></pub-date><volume>0</volume><issue>32</issue><issue-title>Современная функциональная диагностика (4)</issue-title><fpage>27</fpage><lpage>34</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Терегулов Ю.Э., Максимова М.С., Терегулова Е.Е., Чувашаева Ф.Р., Терегулов А.Ю., Милютина О.И., Милютина И.И., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Терегулов Ю.Э., Максимова М.С., Терегулова Е.Е., Чувашаева Ф.Р., Терегулов А.Ю., Милютина О.И., Милютина И.И.</copyright-holder><copyright-holder xml:lang="en">Teregulov Y.E., Maksimova M.S., Teregulov E.T., Chuvashayeva F.R., Teregulov A.Y., Milyutina O.I., Milyutina I.I.</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.med-alphabet.com/jour/article/view/3433">https://www.med-alphabet.com/jour/article/view/3433</self-uri><abstract><p>Полная блокада левой ножки пучка Гиса (ПБЛНПГ) является причиной развития тяжелой сердечной недостаточности, которая требует проведение ресинхронизирующей терапии (CRT). Известно, что одна треть пациентов не отвечает на CRT. Поэтому необходимо проводить поиск новых диагностических критериев ПБЛНПГ для отбора пациентов на CRT.</p><sec><title>Цель исследования</title><p>Цель исследования. Определение критериев ПБЛНПГ по данным трехмерной векторкардиографии с анализом скорости формирования векторной петли.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. В исследование включено 137 пациентов. Основная группа 57 пациентов с ПБЛНПГ, которая установлена на основании ЭКГ критериев D. G. Strauss et al. (2011). Причины ПБЛНПГ и сопутствующие заболевания не учитывались. Контрольная группа включала 80 здоровых лиц. Всем пациентам была проведена синхронная регистрация 12 стандартных отведений ЭКГ и проведена реконструкция трехмерной векторкардиограммы (ВКГ) по системе МакФи-Парунгао.</p></sec><sec><title>Результаты исследования</title><p>Результаты исследования. Показано, что для ПБЛНПГ по данным трехмерной ВКГ характерны следующие признаки: • перелом пространственной векторной петли за счет изменения направления фронта возбуждения в средней ее части; • снижение индекса планарности (PI) менее 80%; • резкое, в 2 и более раза, снижение скорости трассировки пространственной векторной петли в средней ее части с формированием «клешнеобразной» кривой с двумя пиками R и L.</p></sec><sec><title>Выводы</title><p>Выводы: трехмерная ВКГ позволяет достоверно определить «истинную» ПБЛНПГ на основании «перелома» пространственной векторной петли со снижением PI менее 80% и значительным снижением скорости трассировки векторной петли в средней ее части с формированием «клешнеобразной» кривой и провести дифференциальную диагностику с «ложной» ПБЛНПГ, при которой изменения на ЭКГ определяются сочетанием гипертрофии левого желудочка и передневерхнего полублока, когда отсутствует «перелом» петли и снижение PI, а скорость трассировки снижается в конечной части петли без формирования «клешнеобразной» кривой.</p></sec></abstract><trans-abstract xml:lang="en"><p>The complete left bundle branch block (CLBBB) leads to the development of severe heart failure and requires resynchronization therapy(CRT). It is known that one third of patients do not respond to CRT. In this regard, it is necessary to search new diagnostic criteria for patient selection for CRT.</p><sec><title>Aim</title><p>Aim. Determination of the criteria for CLBBB using three-dimensional vectorcardiography data with analysis of the rate of vector loop formation.</p><p>Material and research methods. The study included 137 patients. The main group consisted of 57 patients with CLBBB, which was based on D. G. Strauss et al. (2011) criteria. Causes of CLBBB and comorbidities were not considered. The control group included 80 healthy individuals. All patients underwent synchronous registration of 12 standard ECG leads and reconstruction of a three-dimensional vectorcardiogram (VCG) using the McFee-Parungao system.</p></sec><sec><title>Research results</title><p>Research results. The following signs are characteristic for CLBBB according to three-dimensional VCG data: • fracture of the spatial vector loop due to a change in the direction of the excitation front in its middle part; • reduction in planarity index (PI) less than 80%; • a sharp, by a factor of 2 or more, decrease in the speed of tracing a spatial vector loop in its middle part with the formation of a “claw-shaped” curve with two peaks R and L.</p></sec><sec><title>Conclusion</title><p>Conclusion. Three-dimensional VCG allows you to reliably determine the «true» CLBBB, based on the “fracture” of the spatial vector loop with a reduction in PI less than 80% and a significant decrease in the speed of tracing the vector loop in its middle part with the formation of a “clawshaped” curve and carry out a differential diagnosis with “false” СLBBB, in which changes on the ECG are associated with a combination of left ventricular hypertrophy and left anterior fascicular block, when there is no “fracture” of the loop, a reduction in PI, and the routing speed decreases at the end of the loop without forming a “claw-shaped” curve.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>блокада левой ножки пучка Гиса</kwd><kwd>электрокардиография</kwd><kwd>векторкардиография</kwd><kwd>собственная плоскость</kwd><kwd>индекс планарности</kwd><kwd>ресинхронизирующая терапия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>left bundle branch block</kwd><kwd>electrocardiography</kwd><kwd>vectorcardiography</kwd><kwd>own plane</kwd><kwd>planarity index</kwd><kwd>resynchronization therapy</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">Кузнецов В.А. Сердечная ресинхронизирующая терапия: избранные вопросы. Москва 2007; 128 С.</mixed-citation><mixed-citation xml:lang="en">Кузнецов В.А. Сердечная ресинхронизирующая терапия: избранные вопросы. Москва 2007; 128 С.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Vardas P., Auricchio A., Blanc J., Daubert J. et al. Guidelines for cardiac pacing and cardiac resynchronization therapy. The Task Force for Cardiac Pacing and Cardiac Resynchronization Therapy of the European Society of Cardiology. Developed in Collaboration with the EuropeanHeart Rhythm Association// Eur Heart J. 2007.Sep;28(18):2256–95. doi: 10.1093/eurheartj/ehm305.</mixed-citation><mixed-citation xml:lang="en">Vardas P., Auricchio A., Blanc J., Daubert J. et al. Guidelines for cardiac pacing and cardiac resynchronization therapy. The Task Force for Cardiac Pacing and Cardiac Resynchronization Therapy of the European Society of Cardiology.  Developed in Collaboration with the EuropeanHeart Rhythm Association// Eur Heart J. 2007.Sep;28(18):2256–95. doi: 10.1093/eurheartj/ehm305.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Francia P., Balla C., Paneni F., Volpe M. LeftBundle-Branch Block — Pathophysiology,Prognosis, and Clinical. Clin. Cardiol. 2007 Mar;30(3):110–5. doi: 10.1002/clc.20034.</mixed-citation><mixed-citation xml:lang="en">Francia P., Balla C., Paneni F., Volpe M. LeftBundle-Branch Block — Pathophysiology,Prognosis, and Clinical. Clin. Cardiol. 2007 Mar;30(3):110–5. doi: 10.1002/clc.20034.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Zannad F., Huvelle E., Dickstein K., van Veldhuisen D.J., Stellbrink C., Køber L.,Cazeau S., Ritter P., Maggioni A.P., Ferrari R., Lechat P. Left bundle branchblock as a risk factor for progression to heart failure. Eur J Heart Fail. 2007 Jan;9(1):7–14. doi: 10.1016/j.ejheart.2006.04.011.</mixed-citation><mixed-citation xml:lang="en">Zannad F., Huvelle E., Dickstein K., van Veldhuisen D.J., Stellbrink C., Køber L.,Cazeau S., Ritter P., Maggioni A.P., Ferrari R., Lechat P. Left bundle branchblock as a risk factor for progression to heart failure. Eur J Heart Fail. 2007 Jan;9(1):7–14. doi: 10.1016/j.ejheart.2006.04.011.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Imanishi R., Seto S., Ichimaru S., Nakashima E., Yano K., Akahoshi M. Prognostic significance of incident complete left bundle branch block observed over a 40-year period. Am J Cardiol. 2006 Sep 1;98(5):644-8. doi: 10.1016/j.amjcard.2006.03.044.</mixed-citation><mixed-citation xml:lang="en">Imanishi R., Seto S., Ichimaru S., Nakashima E., Yano K., Akahoshi M. Prognostic significance of incident complete left bundle branch block observed over a 40-year period. Am J Cardiol. 2006 Sep 1;98(5):644-8. doi: 10.1016/j.amjcard.2006.03.044.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Schneider J., Thomas J., Kreger B. et al. Newly acquired left bundle branch block: the Framingham study. Ann Intern Med 1979; 90:303–10.</mixed-citation><mixed-citation xml:lang="en">Schneider J., Thomas J., Kreger B. et al. Newly acquired left bundle branch block: the Framingham study. Ann Intern Med 1979; 90:303–10.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Khan K., Good K., Cleland J. et al. Prevalence of ECG abnormalities in an international survey of patients with suspected or confirmed heart failure at death or discharge // Eur J Heart Failure 2007; Vol. 9:491–501.</mixed-citation><mixed-citation xml:lang="en">Khan K., Good K., Cleland J. et al. Prevalence of ECG abnormalities in an international survey of patients with suspected or confirmed heart failure at death or discharge // Eur J Heart Failure 2007; Vol. 9:491–501.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Strauss D.G., Selvester R.H., Wagner G.S. Defining left bundle branch block in the era of cardiac resynchronization therapy. Am J Cardiol 2011;107:927–934</mixed-citation><mixed-citation xml:lang="en">Strauss D.G., Selvester R.H., Wagner G.S. Defining left bundle branch block in the era of cardiac resynchronization therapy. Am J Cardiol 2011;107:927–934</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Breithardt G., Breithardt O.A. Left bundle branch block, an old-new entity. J Cardiovasc Transl Res. 2012; 5(2):107–116.</mixed-citation><mixed-citation xml:lang="en">Breithardt G., Breithardt O.A. Left bundle branch block, an old-new entity. J Cardiovasc Transl Res. 2012; 5(2):107–116.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Strauss D. G. Differentiation between left bundle branch block and left ventricular hypertrophy: Implications for cardiac resynchronization therapy. Journal of Electrocardiology. 2012 Nov-Dec;45(6):635–9. doi: 10.1016/j.jelectrocard.2012.09.001.</mixed-citation><mixed-citation xml:lang="en">Strauss D. G. Differentiation between left bundle branch block and left ventricular hypertrophy: Implications for cardiac resynchronization therapy. Journal of Electrocardiology. 2012 Nov-Dec;45(6):635–9. doi: 10.1016/j.jelectrocard.2012.09.001.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Strauss D.G., Selvester R.H. The QRS complex-a biomarker that “images” the heart: QRS scores to quantify myocardial scar in the presence of normal and abnormal ventricular conduction. Journal of Electrocardiology. 2009 Jan-Feb;42(1):85–96. doi: 10.1016/j.jelectrocard.2008.07.011.</mixed-citation><mixed-citation xml:lang="en">Strauss D.G., Selvester R.H. The QRS complex-a biomarker that “images” the heart: QRS scores to quantify myocardial scar in the presence of normal and abnormal ventricular conduction. Journal of Electrocardiology. 2009 Jan-Feb;42(1):85–96. doi: 10.1016/j.jelectrocard.2008.07.011.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Jastrzębski M., Kukla P., Kisiel R., Fijorek K., Moskal P. and Czarnecka D. Comparison of four LBBB definitions for predicting mortality in patients receiving cardiac resynchronization therapy. Ann Noninvasive Electrocardiol. 2018 Sep;23(5):e12563. doi: 10.1111/anec.12563.</mixed-citation><mixed-citation xml:lang="en">Jastrzębski M., Kukla P., Kisiel R., Fijorek K., Moskal P. and Czarnecka D. Comparison of four LBBB definitions for predicting mortality in patients receiving cardiac resynchronization therapy. Ann Noninvasive Electrocardiol. 2018 Sep;23(5):e12563. doi: 10.1111/anec.12563.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Galeotti L., van Dam P. M., Loring Z., Chan D., &amp; Strauss D. G. (2013). Evaluating strict and conventional left bundle branch block criteria using electrocardiographic simulations. Europace, 2013 Dec;15(12):1816–21. doi: 10.1093/europace/eut132.</mixed-citation><mixed-citation xml:lang="en">Galeotti L., van Dam P. M., Loring Z., Chan D., &amp; Strauss D. G. (2013). Evaluating strict and conventional left bundle branch block criteria using electrocardiographic simulations. Europace, 2013 Dec;15(12):1816–21. doi: 10.1093/europace/eut132.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Pérez-Riera A.R., Barbosa-Barros R., de Rezende Barbosa M.P.C., DaminelloRaimundo R., de Abreu L.C., Nikus K. Left bundle branch block: Epidemiology, etiology, anatomic features, electrovectorcardiography, and classification proposal Ann Noninvasive Electrocardiol. 2019 Mar;24(2):e12572. doi: 10.1111/anec.12572.</mixed-citation><mixed-citation xml:lang="en">Pérez-Riera A.R., Barbosa-Barros R., de Rezende Barbosa M.P.C., DaminelloRaimundo R., de Abreu L.C., Nikus K. Left bundle branch block: Epidemiology, etiology, anatomic features, electrovectorcardiography, and classification proposal Ann Noninvasive Electrocardiol. 2019 Mar;24(2):e12572. doi: 10.1111/anec.12572.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Pastore C.A., Samesima N., Pereira FilhoH.G., Tobias N.M.M.O., MadalosoB.A., Facin M. E. Applicability of the Electro-Vectorcardiogram in Current Clinical Practice. Arq Bras Cardiol. 2019 Jun 27;113(1):87–99. doi: 10.5935/abc.20190095.</mixed-citation><mixed-citation xml:lang="en">Pastore C.A., Samesima N., Pereira FilhoH.G., Tobias N.M.M.O., MadalosoB.A., Facin M. E. Applicability of the Electro-Vectorcardiogram in Current Clinical Practice. Arq Bras Cardiol. 2019 Jun 27;113(1):87–99. doi: 10.5935/abc.20190095.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Титомир Л.И., Руткай-Недецкий И. Анализ ортогональной электрокардиограммы. М.: Наука, 1990. 198 с.</mixed-citation><mixed-citation xml:lang="en">Титомир Л.И., Руткай-Недецкий И. Анализ ортогональной электрокардиограммы. М.: Наука, 1990. 198 с.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Sedaghat G., Ghafoori E., Waks J.W., Kabir M.M., Shvilkin A., Josephson M.E., Tereshchenko L.G. Quantitative Assessment of Vectorcardiographic Loop Morphology. J Electrocardiol. 2016 Mar-Apr;49(2):154–63. doi: 10.1016/j.jelectrocard.2015.12.014.</mixed-citation><mixed-citation xml:lang="en">Sedaghat G., Ghafoori E., Waks J.W., Kabir M.M., Shvilkin A., Josephson M.E., Tereshchenko L.G. Quantitative Assessment of Vectorcardiographic Loop Morphology. J Electrocardiol. 2016 Mar-Apr;49(2):154–63. doi: 10.1016/j.jelectrocard.2015.12.014.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Терегулов Ю.Э., Ацель Е.А., Ганиева С. Ф., Терегулова Е. Т., Максимова М.С., Терегулов А.Ю., Камалетдинова З.А. Трехмерный векторный анализ ЭКГ в диагностике блокады передневерхней ветви левой ножки пучка Гиса. Медицинский алфавит. Современная функциональная диагностика. 2023; (15): 28–34. https://doi.org/10.33667/2078-5631-2023-15-28-34</mixed-citation><mixed-citation xml:lang="en">Терегулов Ю.Э., Ацель Е.А., Ганиева С. Ф., Терегулова Е. Т., Максимова М.С., Терегулов А.Ю., Камалетдинова З.А. Трехмерный векторный анализ ЭКГ в диагностике блокады передневерхней ветви левой ножки пучка Гиса. Медицинский алфавит. Современная функциональная диагностика. 2023; (15): 28–34. https://doi.org/10.33667/2078-5631-2023-15-28-34</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>
