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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">10.20996/1819-6446-2024-3108</article-id><article-id custom-type="edn" pub-id-type="custom">YZDWAM</article-id><article-id custom-type="elpub" pub-id-type="custom">rpcardio-3108</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>CLINICAL CASE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group></article-categories><title-group><article-title>Myocardial infarction of the "forgotten chamber of the heart" — the right atrium: a clinical case</article-title><trans-title-group xml:lang="ru"><trans-title>Инфаркт миокарда "забытой камеры сердца" — правого предсердия: клинический случай</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-9442-8273</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корнев</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kornev</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Корнев Николай Игоревич</p><p>Рязань</p></bio><bio xml:lang="en"><p>Nikolay I. Kornev</p><p>Ryazan</p></bio><email xlink:type="simple">medkornev@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/0000-0001-6141-8994</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Переверзева</surname><given-names>К. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Pereverzeva</surname><given-names>K. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Переверзева Кристина Геннадьевна</p><p>Рязань</p></bio><bio xml:lang="en"><p>Kristina G. Pereverzeva</p><p>Ryazan</p></bio><email xlink:type="simple">pereverzevakg@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/0000-0002-1394-3791</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Якушин</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakushin</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Якушин Сергей Степанович</p><p>Рязань</p></bio><bio xml:lang="en"><p>Sergey S. Yakushin</p><p>Ryazan</p></bio><email xlink:type="simple">ssyakushin@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/0000-0003-1435-4865</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Глуховец</surname><given-names>И. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Glukhovets</surname><given-names>I. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Глуховец Илья Борисович</p><p>Рязань</p></bio><bio xml:lang="en"><p>Ilya В. Glukhovets</p><p>Ryazan</p></bio><email xlink:type="simple">gluhoveci@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Рязанский государственный медицинский университет им. акад. И. П. Павлова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pavlov Ryazan State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>17</day><month>12</month><year>2024</year></pub-date><volume>20</volume><issue>6</issue><fpage>660</fpage><lpage>668</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kornev N.I., Pereverzeva K.G., Yakushin S.S., Glukhovets I.B., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Корнев Н.И., Переверзева К.Г., Якушин С.С., Глуховец И.Б.</copyright-holder><copyright-holder xml:lang="en">Kornev N.I., Pereverzeva K.G., Yakushin S.S., Glukhovets I.B.</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/3108">https://www.rpcardio.online/jour/article/view/3108</self-uri><abstract><p>The incidence of atrial myocardial infarction (MI) varies widely, from 0.7 to 42%. This indicates that atrial MI is an overlooked rather than a rare pathology. Ischemic myocardial damage due to atherosclerotic lesions of the coronary vessels is characteristic of left atrial MI, which is often combined with left ventricular MI. In right atrial (RA) MI, the main pathogenesis link is RA overload, which occurs due to pulmonary hypertension. Isolated atrial MI is a poorly understood issue in modern cardiology; however, it may have independent clinical significance. However, there is no unified approach to pathogenesis, and there is no specific diagnostics or treatment. The article presents a clinical case of isolated RA MI (isolated necrosis of the right cardiac auricle) that developed as a result of a series of sequential events triggered by acute decompensation of chronic heart failure (CHF). The cause of this acute decompensation of CHF remains debatable. Probably, the leading contribution to CHF decompensation was made by a previous left ventricular MI with damage to the infarct-related right coronary artery basin, which causes RA involvement. Acute decompensation of CHF led to the development of deep vein thrombosis of the lower extremities. Pulmonary embolism developed as a result of deep vein thrombosis of the lower extremities and caused pulmonary hypertension, which in turn served as the basis for the development of RA MI. Due to the small thickness of the atrial wall, acute ischemic damage to the RA in this clinical case led to myomalacia and perforation of the RA wall. Due to the complexity of lifetime diagnosis of isolated atrial myocardial damage and scant clinical symptoms, this condition requires special attention and should be covered in order to develop generally accepted views on the management of patients with this pathology and to determine a list of effective treatment measures aimed at saving the patient’s life.</p></abstract><trans-abstract xml:lang="ru"><p>Частота инфаркта миокарда (ИМ) предсердий варьирует в широких пределах — от 0,7 до 42%. Это свидетельствует о том, что ИМ предсердий, скорее упускаемая из виду, чем редкая патология. Ишемическое повреждение миокарда ввиду атеросклеротического поражения сосудов коронарного русла характерно для ИМ левого предсердия, который часто сочетается с ИМ левого желудочка. При ИМ правого предсердия (ПП) основное звено патогенеза — перегрузка ПП, возникающая вследствие легочной гипертензии. Изолированный ИМ предсердий представляет собой малоизученную проблему современной кардиологии, тем не менее может иметь самостоятельное клиническое значение. Однако единый подход в вопросах патогенеза отсутствует, специфической диагностики и лечения нет. В статье приводится клинический случай развития изолированного ИМ ПП (изолированный некроз правого сердечного ушка), возникшего вследствие цепочки последовательных событий, пусковым моментом для которых послужила острая декомпенсация хронической сердечной недостаточности (ХСН). При этом вопрос о причине настоящей острой декомпенсации ХСН остается дискуссионным. Вероятно, ведущий вклад в декомпенсацию ХСН внес перенесенный в прошлом ИМ левого желудочка с поражением бассейна инфаркт-связанной правой коронарной артерии, что определяет вовлеченность ПП. Острая декомпенсация ХСН привела к развитию тромбоза глубоких вен нижних конечностей. Тромбоэмболия легочной артерии возникла вследствие тромбоза глубоких вен нижних конечностей и стала причиной легочной гипертензии, которая в свою очередь послужила основой для развития ИМ ПП. Из-за малой толщины стенки предсердий острое ишемическое повреждение ПП в рассматриваемом клиническом случае привело к миомаляции и перфорации стенки ПП. В силу сложности прижизненной диагностики изолированного поражения миокарда предсердий и скудной клинической симптоматики данное состояние требует особого внимания, и должно быть освещено с целью выработки общепризнанных взглядов на ведение больных с этой патологией для определения перечня эффективных лечебных мероприятий, направленных на спасение жизни пациента.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>инфаркт миокарда предсердий</kwd><kwd>изолированный некроз правого сердечного ушка</kwd><kwd>миомаляция и перфорация стенки предсердий</kwd><kwd>тромбоз глубоких вен нижних конечностей</kwd><kwd>легочная гипертензия</kwd><kwd>тромбоэмболия легочной артерии</kwd><kwd>острая декомпенсация хронической сердечной недостаточности</kwd><kwd>чреспищеводная эхокардиография</kwd></kwd-group><kwd-group xml:lang="en"><kwd>atrial myocardial infarction</kwd><kwd>isolated necrosis of the right atrial appendage</kwd><kwd>atrial wall myomalacia and perforation</kwd><kwd>deep vein thrombosis of the lower extremities</kwd><kwd>pulmonary hypertension</kwd><kwd>pulmonary embolism</kwd><kwd>acute decompensation of chronic heart failure</kwd><kwd>transesophageal echocardiography</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">Young EW, Koenig A. 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