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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">CardioSomatics</journal-id><journal-title-group><journal-title xml:lang="en">CardioSomatics</journal-title><trans-title-group xml:lang="ru"><trans-title>CardioСоматика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2221-7185</issn><issn publication-format="electronic">2658-5707</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">641936</article-id><article-id pub-id-type="doi">10.17816/CS641936</article-id><article-id pub-id-type="edn">XQRANE</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Case reports</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические случаи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Hodgkin lymphoma as a rare cause of complete atrioventricular block: a case report</article-title><trans-title-group xml:lang="ru"><trans-title>Лимфома Ходжкина — редкая причина полной атриовентрикулярной блокады (клинический случай)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7114-435X</contrib-id><contrib-id contrib-id-type="spin">5754-5210</contrib-id><name-alternatives><name xml:lang="en"><surname>Pravkina</surname><given-names>Ekaterina A.</given-names></name><name xml:lang="ru"><surname>Правкина</surname><given-names>Екатерина Алексеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><email>vikont313arbus@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-8371-4027</contrib-id><name-alternatives><name xml:lang="en"><surname>Sinitsyn</surname><given-names>Dmitry S.</given-names></name><name xml:lang="ru"><surname>Синицын</surname><given-names>Дмитрий Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dimasinitsyn2001@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-0362-7586</contrib-id><name-alternatives><name xml:lang="en"><surname>Vikulova</surname><given-names>Polina S.</given-names></name><name xml:lang="ru"><surname>Викулова</surname><given-names>Полина Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>pollybomb26@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1435-4865</contrib-id><contrib-id contrib-id-type="spin">5261-5174</contrib-id><name-alternatives><name xml:lang="en"><surname>Glukhovets</surname><given-names>Ilya B.</given-names></name><name xml:lang="ru"><surname>Глуховец</surname><given-names>Илья Борисович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), Assistant Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><email>gluchoveci@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7459-5380</contrib-id><contrib-id contrib-id-type="spin">3467-6209</contrib-id><name-alternatives><name xml:lang="en"><surname>Subbotin</surname><given-names>Sergei V.</given-names></name><name xml:lang="ru"><surname>Субботин</surname><given-names>Сергей Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>subbotinsv.89@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ryazan State Medical University</institution></aff><aff><institution xml:lang="ru">Рязанский государственный медицинский университет им. акад. И.П. Павлова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Regional Clinical Cardiology Dispensary</institution></aff><aff><institution xml:lang="ru">Областной клинический кардиологический диспансер</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-07-13" publication-format="electronic"><day>13</day><month>07</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-06-11" publication-format="electronic"><day>11</day><month>06</month><year>2025</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>176</fpage><lpage>187</lpage><history><date date-type="received" iso-8601-date="2024-12-18"><day>18</day><month>12</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-06-16"><day>16</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, ООО "Эко-Вектор"</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">ООО "Эко-Вектор"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://cardiosomatics.ru/2221-7185/article/view/641936">https://cardiosomatics.ru/2221-7185/article/view/641936</self-uri><abstract xml:lang="en"><p><bold>INTRODUCTION:<italic> </italic></bold>Complete atrioventricular block is a life-threatening condition that requires urgent intervention and pacemaker implantation. Determining the underlying cause of the block is essential for effective management. This article describes a rare clinical case of third-degree atrioventricular block caused by Hodgkin lymphoma.</p> <p><bold>Case Description:<italic> </italic></bold>On January 14, 2023, an 81-year-old female was urgently admitted to a district hospital with dyspnea, generalized weakness, lower extremity edema, cough, and fever. The rhythm on electrocardiography was interpreted as atrial fibrillation, and chest radiography demonstrated pathologic findings. Pneumonia was diagnosed, and treatment with antibiotics, antiarrhythmic agents, and anticoagulants was initiated. During treatment, sinus rhythm with supraventricular extrasystoles and diffuse myocardial changes was recorded. No clinical improvement was observed. On January 31, 2023, complete atrioventricular block was documented. The patient was urgently transferred to the inpatient cardiology department, where a temporary pacemaker was implanted. Differential diagnosis of the conduction disturbance included drug-induced atrioventricular block and myocardial infarction. Echocardiography revealed masses in the right atrium, thickening of the pericardial leaflets, fluid accumulation in the cavities, and interventricular septal dyskinesia. Computed tomography planned to rule out pulmonary embolism (PE) was not performed because of technical limitations. After 29 hours of hospitalization, the patient died. Postmortem examination revealed Hodgkin lymphoma involving the mediastinum, blood vessels, and all layers of the heart. Thrombotic deposits and tumor emboli containing lymphoma cells were identified in the small branches of the pulmonary arteries. Advanced age, nonspecific symptoms, lack of suspicion for B symptoms, and the rarity of such a cause of atrioventricular block contributed to the delayed diagnosis.</p> <p><bold>CONCLUSION:<italic> </italic></bold>Oncologic vigilance among cardiologists regarding patients with atrioventricular block remains low, which may result in diagnostic errors and, in some cases, fatal outcomes. Cardiac involvement may be the first manifestation of mediastinal lymphoma. In the present case, computed tomography might have guided physicians toward the correct diagnosis. This article aims to raise awareness among physicians about lymphomas with cardiac involvement, thereby facilitating earlier diagnosis and more effective treatment.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Полная поперечная блокада — опасное состояние, требующее неотложной помощи и установки кардиостимулятора. При этом ключевой элемент успешного лечения — выявление причины блокады. В статье описан редкий клинический случай, при котором атриовентрикулярная блокада III степени была вызвана лимфомой Ходжкина.</p> <p><bold>Описание клинического случая. </bold>14.01.2023 пациентка, 81 год, экстренно госпитализирована в районную больницу с жалобами на одышку, слабость, отёки ног, кашель и лихорадку. На электрокардиограмме ритм расценен как фибрилляция предсердий, на рентгенограмме описаны патологические изменения. Поставлен диагноз «пневмония», начата терапия антибиотиками, антиаритмиками и антикоагулянтами. За время лечения регистрировался синусовый ритм с наджелудочковой экстрасистолией с диффузными изменениями миокарда. Клинического улучшения не наблюдалось. 31.01.2023 зафиксирована полная атриовентрикулярная блокада, пациентка экстренно переведена в кардиологический стационар, где установлен временный электрокардиостимулятор. При дифференциальной диагностике причин блокады обсуждались побочные эффекты препаратов и инфаркт миокарда. Эхокардиография выявила образования в правом предсердии, утолщение листков перикарда, жидкость в полостях и дискинез межжелудочковой перегородки. Компьютерная томография, запланированная для исключения ТЭЛА, не выполнена по техническим причинам. Спустя 29 ч пребывания в стационаре пациентка скончалась. Патологоанатомическое исследование выявило лимфому Ходжкина с поражением средостения, сосудов и всех оболочек сердца. Также обнаружены тромботические наложения и тромбоэмболия с опухолевыми клетками в мелких ветвях лёгочных артерий. Старческий возраст, неспецифические жалобы, отсутствие подозрения на В-симптомы и редкие причины блокад привели к несвоевременной диагностике.</p> <p><bold>Заключение. </bold>Онконастороженность врачей-кардиологов в отношении пациентов с атриовентрикулярными блокадами весьма низкая, что может приводить к диагностическим ошибкам, иногда фатальным для пациента. Поражение сердца может быть первым проявлением медиастинальной лимфомы. В описанном случае компьютерная томография могла бы направить врачей к верному диагнозу. Данная статья публикуется с целью повышения уровня осведомлённости врачей в отношении лимфом с поражением сердца для ранней диагностики и успешного лечения пациентов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Hodgkin lymphoma</kwd><kwd>case report</kwd><kwd>heart neoplasms</kwd><kwd>mediastinal neoplasms</kwd><kwd>atrioventricular block</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лимфома Ходжкина</kwd><kwd>клинический случай</kwd><kwd>лимфома с поражением сердца</kwd><kwd>лимфома средостения</kwd><kwd>атриовентрикулярная блокада</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Revishvili ASh, Artyukhina EA, Glezer MG, et al. 2020 Clinical practice guidelines for Bradyarrhythmias and conduction disorders. 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