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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">russjcardiol</journal-id><journal-title-group><journal-title xml:lang="ru">Российский кардиологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Cardiology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1560-4071</issn><issn pub-type="epub">2618-7620</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15829/1560-4071-2025-6292</article-id><article-id custom-type="edn" pub-id-type="custom">SQRFGT</article-id><article-id custom-type="elpub" pub-id-type="custom">russjcardiol-6292</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>КЛИНИЧЕСКИЕ СЛУЧАИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASES</subject></subj-group></article-categories><title-group><article-title>Симптом "темных папиллярных мышц" у пациента с аритмогенным пролапсом митрального клапана. Клинический случай</article-title><trans-title-group xml:lang="en"><trans-title>Dark papillary muscles sign in a patient with arrhythmogenic mitral valve prolapse: a case report</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7731-0109</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Евдокимова</surname><given-names>Л. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Evdokimova</surname><given-names>L. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач-рентгенолог рентгенологического отделения клиники им. Э.Э. Эйхвальда, ассистент кафедры лучевой диагностики и лучевой терапии</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>St.Petersburg</p></bio><email xlink:type="simple">Larisa.Evdokimova@szgmu.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/0000-0001-8352-3955</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ицкович</surname><given-names>И. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Itskovich</surname><given-names>I. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., профессор, зав. кафедрой лучевой диагностики и лучевой терапии</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>St.Petersburg</p></bio><email xlink:type="simple">Irina.Itskovich@szgmu.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/0000-0002-6923-5321</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шахбазян</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shakhbazyan</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач-кардиолог клиники "Скандинавия"</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>St.Petersburg</p></bio><email xlink:type="simple">1111@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО Северо-Западный государственный медицинский университет им. И.И. Мечникова Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Mechnikov North-Western State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ООО "АВА-ПЕТЕР"</institution><country>Россия</country></aff><aff xml:lang="en"><institution>OOO AVAPETER</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>03</day><month>05</month><year>2025</year></pub-date><volume>30</volume><issue>5S</issue><issue-title>Клинические случаи</issue-title><fpage>6292</fpage><lpage>6292</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Евдокимова Л.С., Ицкович И.Э., Шахбазян А.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Евдокимова Л.С., Ицкович И.Э., Шахбазян А.В.</copyright-holder><copyright-holder xml:lang="en">Evdokimova L.S., Itskovich I.E., Shakhbazyan A.V.</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://russjcardiol.elpub.ru/jour/article/view/6292">https://russjcardiol.elpub.ru/jour/article/view/6292</self-uri><abstract><sec><title>Введение</title><p>Введение. В последнее время среди пациентов с пролапсом митрального клапана выделяют подгруппу лиц с повышенным риском развития желудочковых нарушений ритма и внезапной сердечной смерти. Одним из наиболее характерных признаков при "аритмогенном" варианте пролапса митрального клапана называют митральную аннулярную дизъюнкцию, выявляемую при трансторакальной или чрезпищеводной эхокардиографии либо при магнитно-резонансной томографии сердца. Клинические и визуализационные данные применяются для стратификации риска желудочковых аритмий и определения тактики ведения пациента.</p></sec><sec><title>Клинический случай</title><p>Клинический случай. В статье представлен клинический случай молодого мужчины с синдромом аритмогенного пролапса митрального клапана. Наблюдение демонстрирует анатомические особенности строения митрального клапана и связанных с ним подклапанных структур, а также рассматривает их влияние на нарушения сердечного ритма. Особое внимание уделено описанию митральной аннулярной дизъюнкции и симптома "тёмных папиллярных мышц".</p></sec><sec><title>Заключение</title><p>Заключение. Одной из задач для визуализирующих методов диагностики у пациентов с желудочковыми аритмиями и пролапсом митрального клапана является оценка фенотипических факторов риска. Учитывая связь митральной аннулярной дизъюнкции с пролапсом митрального клапана, развитием митральной недостаточности и ассоциацией с жизнеугрожающими желудочковыми нарушениями ритма, крайне важна своевременная диагностика этого патологического состояния и динамическое наблюдение за пациентами.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Recently, a subgroup of patients with mitral valve prolapse has been identified with an increased risk of ventricular arrhythmias and sudden cardiac death. One of the most characteristic signs of the arrhythmogenic mitral valve prolapse is mitral annular disjunction, detected by transthoracic or transesophageal echocardiography or by cardiac magnetic resonance imaging. Clinical and imaging data are used to stratify the risk of ventricular arrhythmias and determine patient management strategy.</p></sec><sec><title>Case report</title><p>Case report. The article presents a case of a young man with arrhythmogenic mitral valve prolapse. The case demonstrates the anatomical features of mitral valve and related subvalvular structures, and also considers their impact on cardiac arrhythmias. Particular attention is paid to the description of mitral annular disjunction and dark papillary muscles sign.</p></sec><sec><title>Conclusion</title><p>Conclusion. One of the tasks for imaging diagnostics in patients with ventricular arrhythmias and mitral valve prolapse is the assessment of phenotypic risk factors. Given the relationship of mitral annular disjunction with mitral valve prolapse, the development of mitral insufficiency and association with life-threatening ventricular arrhythmias, its timely diagnosis and follow-up of patients are extremely important.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>пролапс митрального клапана</kwd><kwd>митральная аннулярная дизъюнкция</kwd><kwd>желудочковые экстрасистолы</kwd><kwd>митральная недостаточность</kwd><kwd>артериальная гипертензия</kwd><kwd>клинический случай</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mitral valve prolapse</kwd><kwd>mitral annular disjunction</kwd><kwd>premature ventricular contractions</kwd><kwd>mitral insufficiency</kwd><kwd>hypertension</kwd><kwd>case report</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">Sabbag A, Essayagh B, Barrera JDR, et al. 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