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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">10.33667/2078-5631-2019-2-21(396)-18-21</article-id><article-id custom-type="elpub" pub-id-type="custom">medalphabet-1230</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>Изменение интервала QT в ортостазе — новый диагностический маркер синдрома удлиненного интервала QT</article-title><trans-title-group xml:lang="en"><trans-title>Changing QT interval in orthostasis — new diagnostic marker of syndrome of extended QT interval</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>Комолятова</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Komolyatova</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д. м. н., проф. кафедры педиатрии; врач</p><p>г. Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макаров</surname><given-names>Л. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarov</surname><given-names>L. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д. м. н., проф. кафедры клинической физиологии и функциональной диагностики; руководитель </p><p>г. Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Киселева</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kiseleva</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. м. н., врач</p><p>г. Москва</p></bio><bio xml:lang="en"><p>Moscow</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>Беспорточный</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Besportochny</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач </p><p>г. Москва</p></bio><bio xml:lang="en"><p>Moscow</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>Дмитриева</surname><given-names>А. В. </given-names></name><name name-style="western" xml:lang="en"><surname>Dmitrieva</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач </p><p>г. Москва</p></bio><bio xml:lang="en"><p>Moscow</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>Балыкова</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Balykova</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д. м. н., проф., член-корр. РАН, зав. кафедрой педиатрии, директор</p><p>г. Саранск</p></bio><bio xml:lang="en"><p>Saransk</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>Паршина</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Parshina</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>клинический ординатор</p><p>г. Саранск</p></bio><bio xml:lang="en"><p>Saransk</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Академия постдипломного образования ФГБУ «Федеральный научно-клинический центр» Федерального медико-биологического агентства России; Центр синкопальных состояний и сердечных аритмий у детей и подростков на базе ФГБУЗ «Центральная детская клиническая больница» Федерального медико-биологического агентства России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Academy of Postgraduate Education of Federal Scientific and Clinical Centre for Otorhinolaryngology; Centre for Syncope and Cardiac Arrhythmias in Children and Adolescents of the Central Clinical Children Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Центр синкопальных состояний и сердечных аритмий у детей и подростков на базе ФГБУЗ «Центральная детская клиническая больница» Федерального медико-биологического агентства России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Centre for Syncope and Cardiac Arrhythmias in Children and Adolescents of the Central Clinical Children Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Медицинский институт ФГБОУ ВО «Национальный исследовательский Мордовский государственный университет имени Н. П. Огарева»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Mordovia State University n. a. N. P. Ogarev</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>25</day><month>11</month><year>2019</year></pub-date><volume>2</volume><issue>21</issue><issue-title>Обозрение</issue-title><fpage>18</fpage><lpage>21</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Комолятова В.Н., Макаров Л.М., Киселева И.И., Беспорточный Д.А., Дмитриева А.В., Балыкова Л.А., Паршина Т.С., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Комолятова В.Н., Макаров Л.М., Киселева И.И., Беспорточный Д.А., Дмитриева А.В., Балыкова Л.А., Паршина Т.С.</copyright-holder><copyright-holder xml:lang="en">Komolyatova V.N., Makarov L.M., Kiseleva I.I., Besportochny D.A., Dmitrieva A.V., Balykova L.A., Parshina T.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://www.med-alphabet.com/jour/article/view/1230">https://www.med-alphabet.com/jour/article/view/1230</self-uri><abstract><p>Синдром удлиненного интервала QT (СУИQT) —  заболевание, приводящее к возникновению жизнеугрожающих аритмий и синдрому внезапной смерти. В последнее время было показано, что около половины больных с СУИQT имеют нормальные значения интервала QTс на ЭКГ. Целью настоящего исследования явилось оценить изменения интервала QT у больных с СУИQT в ортостазе для выявления дополнительных критериев заболевания. Обследовано 64 пациента от 4 до 47 лет (13,3 ± 10,0) с СУИQT. Контрольную группу составили 87 здоровых 4–20 лет (11,0 ± 3,5). Всем проводилась ЭКГ в положении лежа и стоя. Оценивались ЧСС, интервалы QT, QTc в обоих положениях и разница между этими показателями. В обеих группах мы отмечали увеличение ЧСС и QTc и укорочение интервала QT в ортостазе. Выявлены достоверно различия между всеми параметрами, кроме прироста интервала QTс (∆QTc) в основной и контрольной группах. ROC анализ выявил: оптимальной точкой для выявления больных с СУИQT значение интервала QTс в ортостазе –500 мс с Se —  73 %, Sp —  93 %. Выводы: в ранний период ортостаза происходит увеличение ЧСС, укорочение интервала QT и удлинение интервала QTс; удлинение интервала QTс в ранний период ортостаза более 500 мс является высокочувствительным и высокоспецифичным в определении пациентов с синдромом удлиненного интервала QT.</p></abstract><trans-abstract xml:lang="en"><p>Long QT interval syndrome (LQTS) is a disease that causes life-threatening arrhythmias and sudden death syndrome. Recently, it has been shown that about half of patients with LQTS have normal QTc interval values on an ECG. The purpose of this study was to assess changes in the QT interval in patients with LQTS in orthostasis to identify additional criteria for the disease. Surveyed 64 patients from 4 to 47 years old (13.3 ± 10.0) with LQTIS. The control group consisted of 87 healthy people of 4–20 years (11.0 ± 3.5). An ECG was performed in a lying and standing position. HR, QT and QTc interrvals in both positions and the difference between these indicators were evaluated. In both groups, we noted an increase in heart rate and QTc and a shortening of the QT interval in orthostasis. Distinctions between all parameters were revealed reliably, except for the increase in the QTc interval (∆QTc) in the main and control groups. ROC analysis revealed that the optimal point for identifying patients with LQTS is QTc interval in orthostasis –500 ms with Se 73 % and Sp 93 %. Conclusions. In the early period of orthostasis, an increase in the heart rate, a shortening of the QT interval and a prolongation of the QTc interval occur; lengthening the QTc interval in the early period of orthostasis over 500 ms is highly sensitive and highly specific in identifying patients with the syndrome of prolonged QT-interval.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>интервал QТ</kwd><kwd>синдром удлиненного интервала QT</kwd><kwd>ЧСС и интервал QT в ортостазе</kwd></kwd-group><kwd-group xml:lang="en"><kwd>QT interval</kwd><kwd>extended interval syndrome QT</kwd><kwd>heart rate and QT interval in orthostasis</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">Niimura I, Maki T. Sudden cardiac death in childhood. Jpn Circ J. 1989; 53 (12): 1571–1580.</mixed-citation><mixed-citation xml:lang="en">Niimura I, Maki T. Sudden cardiac death in childhood. 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