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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">cardio</journal-id><journal-title-group><journal-title xml:lang="ru">Кардиология</journal-title><trans-title-group xml:lang="en"><trans-title>Kardiologiia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0022-9040</issn><issn pub-type="epub">2412-5660</issn><publisher><publisher-name>Kardiomag</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18087/cardio.2026.4.n3025</article-id><article-id custom-type="elpub" pub-id-type="custom">cardio-3025</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH ARTICLES</subject></subj-group></article-categories><title-group><article-title>Предикторы резистентности тромбоза ушка левого предсердия к лизису у пациентов с неклапанной фибрилляцией предсердий</article-title><trans-title-group xml:lang="en"><trans-title>Predictors of Left Atrium Appendage Thrombosis Resistance to Lysis in Patients With Nonvalvular Atrial Fibrillation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6049-8985</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белокурова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Belokurova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.м.н., н.с. отделения нарушений ритма сердца научного отдела инструментальных методов исследования</p></bio><bio xml:lang="en"><p>MD, PhD, Scientific Researcher of Heart Rhythm Disturbances Department of Scientific Division of Instrumental Research Methods</p></bio><email xlink:type="simple">alfira_m@inbox.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/0000-0002-8160-7060</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мамарина</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mamarina</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.м.н., м.н.с. отделения нарушений ритма сердца научного отдела инструментальных методов исследования</p></bio><bio xml:lang="en"><p>MD, PhD, Junior Scientific Researcher of Heart Rhythm Disturbances Department of Scientific Division of Instrumental Research Methods</p></bio><email xlink:type="simple">MamarinaAV@infarkta.net</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4472-8821</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гизатулина</surname><given-names>Т. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Gizatulina</surname><given-names>T. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., заведующий отделением нарушений ритма сердца научного отдела инструментальных методов исследования</p></bio><bio xml:lang="en"><p>MD, D.Med.Sc., Head of Heart Rhythm Disturbances Department of Scientific Division of Instrumental Research Methods</p></bio><email xlink:type="simple">GizatulinaTP@infarkta.net</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тюменский кардиологический научный центр, Томский национальный исследовательский медицинский центр Российской академии наук, Томск</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tyumen Cardiology Research Center, Tomsk National Research Medical Center of the Russian Academy of Sciences, Tomsk</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>04</day><month>06</month><year>2026</year></pub-date><volume>66</volume><issue>4</issue><fpage>42</fpage><lpage>48</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kardiomag, 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Kardiomag</copyright-holder><copyright-holder xml:lang="en">Kardiomag</copyright-holder><license xlink:href="https://cardio.elpub.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://cardio.elpub.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://cardio.elpub.ru/jour/article/view/3025">https://cardio.elpub.ru/jour/article/view/3025</self-uri><abstract><p>Цель     Выявить предикторы резистентности тромбоза ушка левого предсердия к лизису у пациентов с неклапанной фибрилляцией предсердий (ФП).</p><p>Материал и методы   В исследование включены 83 пациента в период с 2019 по 2024 г., госпитализированных для проведения катетерной аблации или плановой кардиоверсии, у которых первично был выявлен тромбоз ушка левого предсердия (УЛП) по результатам чреспищеводной эхокардиографии (ЧП ЭхоКГ). Продолжительность наблюдения варьировала от 3 до 12 месяцев в зависимости от сроков лизиса тромба. Конечной точкой исследования явилось состояние тромба при оценке результатов ЧП ЭхоКГ в динамике: его отсутствие либо наличие, несмотря на прием оральных антикоагулянтов.</p><p>Результаты    По результатам повторной ЧП ЭхоКГ пациенты были разделены на 2 группы: группа 1 (n=45) – пациенты, у которых произошел лизис тромба УЛП в течение периода наблюдения, группа 2 (n=38) – пациенты, у которых тромб сохранялся до конца периода наблюдения (максимально 12 месяцев). Медиана возраста пациентов составила 62 [55,5; 65,5] года, 39 пациентов (47 %) имели пароксизмальную форму ФП, 44 (53 %) – персистирующую. Из пациентов группы 1 у 24 (53,3 %) лизис тромба УЛП произошел в течение первых 3 месяцев наблюдения, у оставшихся 21 (46,7 %) – позднее 3‑х месяцев. В группе с резистентным тромбом УЛП (n=38) пациенты чаще принимали ривароксабан (p=0,01), у них были выше показатели среднего объема тромбоцитов (MPV) (p=0,035), ширины распределения тромбоцитов (PDW) (p=0,007), соотношения крупных клеток тромбоцитов (P-LCR) (p=0,014), N-концевого фрагмента предшественника мозгового натрийуретического пептида – NT-proBNP (p=0,058), а также больше индекс объема правого предсердия (p=0,034). В прогностическую модель для предсказания устойчивости тромба УЛП к лизису в течение 12 месяцев вошли 3 независимых предиктора: прием ривароксабана (отношение шансов – ОШ 8,683; 95 % доверительный интервал – ДИ 2,083–36,195; р=0,003), уровень NT-proBNP, выраженный в квартилях (ОШ 1,9; 95 % ДИ 1,081–3,376, p=0,026); значение MPV (фл) (ОШ 2,09; 95 % ДИ 1,124–3,885; p=0,02). ROC-анализ подтвердил высокое качество полученной модели: AUC=0,819, специфичность – 77,3 %, чувствительность – 81,5 %, прогностическая точность – 78,9 %.</p><p>Заключение      Определены три предиктора, позволяющих прогнозировать наличие резистентного к лизису тромба в УЛП у пациентов с неклапанной ФП. Учет показателей среднего объема тромбоцитов (MPV) и NT-proBNP может быть использован в персонализированном подходе для прогнозирования риска резистентности тромба УЛП к лизису.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>Aim        To identify predictors of left atrial appendage thrombus resistance to lysis in patients with non-valvular atrial fibrillation (AF).</p><p>Material and methods    The study included 83 patients enrolled between 2019 and 2024 who were hospitalized for catheter ablation or scheduled cardioversion, and in whom left atrial appendage (LAA) thrombus was initially detected via transesophageal echocardiography (TEE). The follow-up period ranged from 3 to 12 months depending on the timing of thrombus resolution. The study endpoint was the status of the thrombus evaluated by repeat TEE, categorized as either resolved or persistent despite oral anticoagulant therapy.</p><p>Results  Based on repeat TEE findings, patients were divided into two groups: Group 1 (n=45), who achieved LAA thrombus resolution during the follow-up period, and Group 2 (n=38), whose thrombi persisted until the end of the follow-up (up to 12 months). The median age was 62 [55.5–65.5] years; 39 patients (47%) had paroxysmal AF, and 44 (53%) had persistent AF. In Group 1, thrombus resolution occurred within the first 3 months in 24 patients (53.3%), and after 3 months in the remaining 21 patients (46.7%). Patients with persistent LAA thrombi were more frequently treated with rivaroxaban (p=0.01) and demonstrated higher mean platelet volume (MPV) (p=0.035), platelet distribution width (PDW) (p=0.007), platelet large cell ratio (P-LCR) (p=0.014), and N-terminal pro-B-type natriuretic peptide (NT-proBNP) levels (p=0.058) alongside greater right atrial volume index (p=0.034). The prognostic model for prediction of 12-month LAA thrombus resistance to lysis identified three independent predictors: rivaroxaban therapy (odds ratio [OR] 8.683; 95% confidence interval [CI] 2.083–36.195; p=0.003), NT-proBNP concentrations expressed in quartiles (OR 1.900; 95% CI 1.081–3.376; p=0.026), and MPV value (fL) (OR 2.090; 95% CI 1.124–3.885; p=0.020). ROC analysis confirmed the high diagnostic performance of the model: AUC=0.819, specificity 77.3%, sensitivity 81.5%, and prognostic accuracy 78.9%.</p><p>Conclusion         Three predictors were identified for forecasting LAA thrombus resistance to lysis in patients with non-valvular AF. Incorporating mean platelet volume (MPV) and NT-proBNP concentrations can support a personalized approach to predict the risk of LAA thrombus resistance.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>Фибрилляция предсердий</kwd><kwd>чреспищеводная эхокардиография</kwd><kwd>тромбоз ушка левого предсердия</kwd><kwd>антикоагулянтная терапия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Atrial fibrillation</kwd><kwd>transesophageal echocardiography</kwd><kwd>left atrial appendage thrombus</kwd><kwd>anticoagulant therapy</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Финансирование отсутствует.  Конфликт интересов Авторы заявляют об отсутствии конфликта интересов.</funding-statement><funding-statement xml:lang="en">This research received no external funding.  Conflict of interest The authors declare no conflict of interest.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bejinariu AG, Härtel DU, Brockmeier J, Oeckinghaus R, Herzer A, Tebbe U. Left atrial thrombi and spontaneous echo contrast in patients with atrial fibrillation: Systematic analysis of a single‑center experience. Herz. 2016;41(8):706–14. DOI: 10.1007/s00059‑016‑4423‑7</mixed-citation><mixed-citation xml:lang="en">Bejinariu AG, Härtel DU, Brockmeier J, Oeckinghaus R, Herzer A, Tebbe U. Left atrial thrombi and spontaneous echo contrast in patients with atrial fibrillation: Systematic analysis of a single‑center experience. Herz. 2016;41(8):706–14. DOI: 10.1007/s00059‑016‑4423‑7</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Alqarawi W, Grose E, Ramirez FD, Sikora L, Golian M, Nair GM et al. Prevalence of Left Atrial Appendage Thrombus in Patients Anticoagulated With Direct Oral Anticoagulants: Systematic Review and Meta‑analysis. CJC Open. 2021;3(5):658–65. DOI: 10.1016/j.cjco.2020.12.012</mixed-citation><mixed-citation xml:lang="en">Alqarawi W, Grose E, Ramirez FD, Sikora L, Golian M, Nair GM et al. Prevalence of Left Atrial Appendage Thrombus in Patients Anticoagulated With Direct Oral Anticoagulants: Systematic Review and Meta‑analysis. CJC Open. 2021;3(5):658–65. DOI: 10.1016/j.cjco.2020.12.012</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Mo G, Wen J, Ye Y, Lu Y, Gan T, Yang Y et al. Efficacy and Safety of New Oral Anticoagulants versus Warfarin in the Resolution of Atrial Fibrillation with Left Atrial/Left Atrial Appendage Thrombus: A Systematic Review and Meta‑Analysis. Reviews in Cardiovascular Medicine. 2025;26(1):26055. DOI: 10.31083/RCM26055</mixed-citation><mixed-citation xml:lang="en">Mo G, Wen J, Ye Y, Lu Y, Gan T, Yang Y et al. Efficacy and Safety of New Oral Anticoagulants versus Warfarin in the Resolution of Atrial Fibrillation with Left Atrial/Left Atrial Appendage Thrombus: A Systematic Review and Meta‑Analysis. Reviews in Cardiovascular Medicine. 2025;26(1):26055. DOI: 10.31083/RCM26055</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Posada‑Martinez EL, Trejo‑Paredes C, Ortiz‑Leon XA, Ivey‑Miranda JB, Lin BA, McNamara RL et al. Differentiating spontaneous echo contrast, sludge, and thrombus in the left atrial appendage: Can ultrasound enhancing agents help? Echocardiography. 2019;36(7):1413–7. DOI: 10.1111/echo.14405</mixed-citation><mixed-citation xml:lang="en">Posada‑Martinez EL, Trejo‑Paredes C, Ortiz‑Leon XA, Ivey‑Miranda JB, Lin BA, McNamara RL et al. Differentiating spontaneous echo contrast, sludge, and thrombus in the left atrial appendage: Can ultrasound enhancing agents help? Echocardiography. 2019;36(7):1413–7. DOI: 10.1111/echo.14405</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Bayar N, Arslan S, Cagirci G, Ureyen CM, Cay S, Yuksel IO et al. Usefulness of mean platelet volume for predicting stroke risk in paroxysmal atrial fibrillation patients. Blood Coagulation &amp; Fibrinolysis. 2015;26(6):669–72. DOI: 10.1097/MBC.0000000000000334</mixed-citation><mixed-citation xml:lang="en">Bayar N, Arslan S, Cagirci G, Ureyen CM, Cay S, Yuksel IO et al. Usefulness of mean platelet volume for predicting stroke risk in paroxysmal atrial fibrillation patients. Blood Coagulation &amp; Fibrinolysis. 2015;26(6):669–72. DOI: 10.1097/MBC.0000000000000334</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Мазур Е.С., Мазур В.В., Баженов Н.Д., Орлов Ю.А. Предикторы растворения тромбов в ушке левого предсердия у больных персистирующей неклапанной фибрилляцией предсердий. Архивъ внутренней медицины. 2022;12(2):129‑35. DOI: 10.20514/2226‑6704‑2021‑12‑2‑129‑135</mixed-citation><mixed-citation xml:lang="en">Mazur E.S., Mazur V.V., Bazhenov N.D., Orlov Yu.A. Predictors of Thrombus Dissolution in the Left Atrial Appendage in Patients with Persistent Nonvalvular Atrial Fibrillation. The Russian Archives of Internal Medicine. 2022;12(2):129–35. DOI: 10.20514/2226‑6704‑2021‑12‑2‑129‑135</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Göldi T, Krisai P, Knecht S, Aeschbacher S, Spies F, Zeljkovic I et al. Prevalence and Management of Atrial Thrombi in Patients With Atrial Fibrillation Before Pulmonary Vein Isolation. JACC: Clinical Electrophysiology. 2019;5(12):1406–14. DOI: 10.1016/j.jacep.2019.09.003</mixed-citation><mixed-citation xml:lang="en">Göldi T, Krisai P, Knecht S, Aeschbacher S, Spies F, Zeljkovic I et al. Prevalence and Management of Atrial Thrombi in Patients With Atrial Fibrillation Before Pulmonary Vein Isolation. JACC: Clinical Electrophysiology. 2019;5(12):1406–14. DOI: 10.1016/j.jacep.2019.09.003</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Durmaz E, Karpuz MH, Bilgehan K, Ikitimur B, Ozmen E, Ebren C et al. Left atrial thrombus in patients with atrial fibrillation and under oral anticoagulant therapy; 3‑D transesophageal echocardiographic study. The International Journal of Cardiovascular Imaging. 2020;36(6):1097–103. DOI: 10.1007/s10554‑020‑01811‑x</mixed-citation><mixed-citation xml:lang="en">Durmaz E, Karpuz MH, Bilgehan K, Ikitimur B, Ozmen E, Ebren C et al. Left atrial thrombus in patients with atrial fibrillation and under oral anticoagulant therapy; 3‑D transesophageal echocardiographic study. The International Journal of Cardiovascular Imaging. 2020;36(6):1097–103. DOI: 10.1007/s10554‑020‑01811‑x</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Corrado G, Tadeo G, Beretta S, Tagliagambe LM, Manzillo GF, Spata M et al. Atrial Thrombi Resolution After Prolonged Anticoagulation in Patients With Atrial Fibrillation. Chest. 1999;115(1):140–3. DOI: 10.1378/chest.115.1.140</mixed-citation><mixed-citation xml:lang="en">Corrado G, Tadeo G, Beretta S, Tagliagambe LM, Manzillo GF, Spata M et al. Atrial Thrombi Resolution After Prolonged Anticoagulation in Patients With Atrial Fibrillation. Chest. 1999;115(1):140–3. DOI: 10.1378/chest.115.1.140</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Bernhardt P, Schmidt H, Hammerstingl C, Hackenbroch M, Sommer T, Lüderitz B et al. Fate of left atrial thrombi in patients with atrial fibrillation determined by transesophageal echocardiography and cerebral magnetic resonance imaging. The American Journal of Cardiology. 2004;94(6):801–4. DOI: 10.1016/j.amjcard.2004.06.010</mixed-citation><mixed-citation xml:lang="en">Bernhardt P, Schmidt H, Hammerstingl C, Hackenbroch M, Sommer T, Lüderitz B et al. Fate of left atrial thrombi in patients with atrial fibrillation determined by transesophageal echocardiography and cerebral magnetic resonance imaging. The American Journal of Cardiology. 2004;94(6):801–4. DOI: 10.1016/j.amjcard.2004.06.010</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Lip GYH, Hammerstingl C, Marin F, Cappato R, Meng IL, Kirsch B et al. Left atrial thrombus resolution in atrial fibrillation or flutter: Results of a prospective study with rivaroxaban (X‑TRA) and a retrospective observational registry providing baseline data (CLOTAF). American Heart Journal. 2016;178:126–34. DOI: 10.1016/j. ahj.2016.05.007</mixed-citation><mixed-citation xml:lang="en">Lip GYH, Hammerstingl C, Marin F, Cappato R, Meng IL, Kirsch B et al. Left atrial thrombus resolution in atrial fibrillation or flutter: Results of a prospective study with rivaroxaban (X‑TRA) and a retrospective observational registry providing baseline data (CLOTAF). American Heart Journal. 2016;178:126–34. DOI: 10.1016/j. ahj.2016.05.007</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Cappato R, Ezekowitz MD, Klein AL, Camm AJ, Ma C‑S, Le Heuzey J‑Y et al. Rivaroxaban vs. vitamin K antagonists for cardioversion in atrial fibrillation. European Heart Journal. 2014;35(47):3346–55. DOI: 10.1093/eurheartj/ehu367</mixed-citation><mixed-citation xml:lang="en">Cappato R, Ezekowitz MD, Klein AL, Camm AJ, Ma C‑S, Le Heuzey J‑Y et al. Rivaroxaban vs. vitamin K antagonists for cardioversion in atrial fibrillation. European Heart Journal. 2014;35(47):3346–55. DOI: 10.1093/eurheartj/ehu367</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Zylla MM, Pohlmeier M, Hess A, Mereles D, Kieser M, Bruckner T et al. Prevalence of Intracardiac Thrombi Under Phenprocoumon, Direct Oral Anticoagulants (Dabigatran and Rivaroxaban), and Bridging Therapy in Patients With Atrial Fibrillation and Flutter. The American Journal of Cardiology. 2015;115(5):635–40. DOI: 10.1016/j.amjcard.2014.12.016</mixed-citation><mixed-citation xml:lang="en">Zylla MM, Pohlmeier M, Hess A, Mereles D, Kieser M, Bruckner T et al. Prevalence of Intracardiac Thrombi Under Phenprocoumon, Direct Oral Anticoagulants (Dabigatran and Rivaroxaban), and Bridging Therapy in Patients With Atrial Fibrillation and Flutter. The American Journal of Cardiology. 2015;115(5):635–40. DOI: 10.1016/j.amjcard.2014.12.016</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Piotrowski R, Zaborska B, Pilichowska‑Paszkiet E, Sikora‑Frąc M, Baran J, Kułakowski P. RIVAroxaban TWICE daily for lysis of thrombus in the left atrial appendage in patients with non‑valvular atrial fibrillation: the RIVA‑TWICE study. Archives of Medical Science. 2020;16(2):289–96. DOI: 10.5114/aoms.2019.86616</mixed-citation><mixed-citation xml:lang="en">Piotrowski R, Zaborska B, Pilichowska‑Paszkiet E, Sikora‑Frąc M, Baran J, Kułakowski P. RIVAroxaban TWICE daily for lysis of thrombus in the left atrial appendage in patients with non‑valvular atrial fibrillation: the RIVA‑TWICE study. Archives of Medical Science. 2020;16(2):289–96. DOI: 10.5114/aoms.2019.86616</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Rekosz J, Karwowski J, Kowalik I, Wiktorska A, Wrzosek K, Solecki M et al. Risk factors for thrombosis and spontaneous echocardiographic contrast with sludge in atrial fibrillation patients treated with oral anticoagulants before electrical cardioversion. Polish Heart Journal. 2024;82(5):516–26. DOI: 10.33963/v.phj.100078</mixed-citation><mixed-citation xml:lang="en">Rekosz J, Karwowski J, Kowalik I, Wiktorska A, Wrzosek K, Solecki M et al. Risk factors for thrombosis and spontaneous echocardiographic contrast with sludge in atrial fibrillation patients treated with oral anticoagulants before electrical cardioversion. Polish Heart Journal. 2024;82(5):516–26. DOI: 10.33963/v.phj.100078</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Yang Q, Liu S, Wang J, Guo Y. An Observational Study: Clinical Manifestations and Prognosis of Left Atrial Thrombosis in Atrial Fibrillation. SN Comprehensive Clinical Medicine. 2023;5(1):159. DOI: 10.1007/s42399‑023‑01500‑5</mixed-citation><mixed-citation xml:lang="en">Yang Q, Liu S, Wang J, Guo Y. An Observational Study: Clinical Manifestations and Prognosis of Left Atrial Thrombosis in Atrial Fibrillation. SN Comprehensive Clinical Medicine. 2023;5(1):159. DOI: 10.1007/s42399‑023‑01500‑5</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Hijazi Z, Wallentin L, Siegbahn A, Andersson U, Christersson C, Ezekowitz J et al. N‑Terminal Pro–B‑Type Natriuretic Peptide for Risk Assessment in Patients With Atrial Fibrillation: insights from the ARISTOTLE Trial (Apixaban for the Prevention of Stroke in Subjects With Atrial Fibrillation). Journal of the American College of Cardiology. 2013;61(22):2274–84. DOI: 10.1016/j.jacc.2012.11.082</mixed-citation><mixed-citation xml:lang="en">Hijazi Z, Wallentin L, Siegbahn A, Andersson U, Christersson C, Ezekowitz J et al. N‑Terminal Pro–B‑Type Natriuretic Peptide for Risk Assessment in Patients With Atrial Fibrillation: insights from the ARISTOTLE Trial (Apixaban for the Prevention of Stroke in Subjects With Atrial Fibrillation). Journal of the American College of Cardiology. 2013;61(22):2274–84. DOI: 10.1016/j.jacc.2012.11.082</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Cai Y, Xiong Q, Chen S, Jiang X, Liao J, Chen W et al. Left Atrial Appendage Thrombus in Patients with Nonvalvular Atrial Fibrillation before Catheter Ablation and Cardioversion: Risk Factors beyond the CHA2DS2‑VASc Score. Journal of Cardiovascular Development and Disease. 2022;9(2):46. DOI: 10.3390/jcdd9020046</mixed-citation><mixed-citation xml:lang="en">Cai Y, Xiong Q, Chen S, Jiang X, Liao J, Chen W et al. Left Atrial Appendage Thrombus in Patients with Nonvalvular Atrial Fibrillation before Catheter Ablation and Cardioversion: Risk Factors beyond the CHA2DS2‑VASc Score. Journal of Cardiovascular Development and Disease. 2022;9(2):46. DOI: 10.3390/jcdd9020046</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Sun S, Su B, Lin J, Zhao C, Ma C. A nomogram to predict left atrial appendage thrombus and spontaneous echo contrast in non‑valvular atrial fibrillation patients. BMC Cardiovascular Disorders. 2022;22(1):311. DOI: 10.1186/s12872‑022‑02737‑z</mixed-citation><mixed-citation xml:lang="en">Sun S, Su B, Lin J, Zhao C, Ma C. A nomogram to predict left atrial appendage thrombus and spontaneous echo contrast in non‑valvular atrial fibrillation patients. BMC Cardiovascular Disorders. 2022;22(1):311. DOI: 10.1186/s12872‑022‑02737‑z</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Ha S‑I, Choi D‑H, Ki Y‑J, Yang J‑S, Park G, Chung J‑W et al. Stroke pre‑diction using mean platelet volume in patients with atrial fibrillation. Platelets. 2011;22(6):408–14. DOI: 10.3109/09537104.2011.560306</mixed-citation><mixed-citation xml:lang="en">Ha S‑I, Choi D‑H, Ki Y‑J, Yang J‑S, Park G, Chung J‑W et al. Stroke pre‑diction using mean platelet volume in patients with atrial fibrillation. Platelets. 2011;22(6):408–14. DOI: 10.3109/09537104.2011.560306</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Zheng M, Chen S, Zhu Y, Gu X. Mean platelet volume: a new predictor of ischaemic stroke risk in patients with nonvalvular atrial fibrillation. BMC Cardiovascular Disorders. 2020;20(1):241. DOI: 10.1186/s12872‑020‑01525‑x</mixed-citation><mixed-citation xml:lang="en">Zheng M, Chen S, Zhu Y, Gu X. Mean platelet volume: a new predictor of ischaemic stroke risk in patients with nonvalvular atrial fibrillation. BMC Cardiovascular Disorders. 2020;20(1):241. DOI: 10.1186/s12872‑020‑01525‑x</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Providência R, Faustino A, Paiva L, Fernandes A, Barra S, Pimenta J et al. Mean platelet volume is associated with the presence of left atrial stasis in patients with non‑valvular atrial fibrillation. BMC Cardiovascular Disorders. 2013;13(1):40. DOI: 10.1186/1471‑2261‑13‑40</mixed-citation><mixed-citation xml:lang="en">Providência R, Faustino A, Paiva L, Fernandes A, Barra S, Pimenta J et al. Mean platelet volume is associated with the presence of left atrial stasis in patients with non‑valvular atrial fibrillation. BMC Cardiovascular Disorders. 2013;13(1):40. DOI: 10.1186/1471‑2261‑13‑40</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Tajarernmuang P, Phrommintikul A, Limsukon A, Pothirat C, Chittawatanarat K. The Role of Mean Platelet Volume as a Predictor of Mortality in Critically Ill Patients: A Systematic Review and MetaAnalysis. Critical Care Research and Practice. 2016;2016:4370834. DOI: 10.1155/2016/4370834</mixed-citation><mixed-citation xml:lang="en">Tajarernmuang P, Phrommintikul A, Limsukon A, Pothirat C, Chittawatanarat K. The Role of Mean Platelet Volume as a Predictor of Mortality in Critically Ill Patients: A Systematic Review and MetaAnalysis. Critical Care Research and Practice. 2016;2016:4370834. DOI: 10.1155/2016/4370834</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Yuce M, Cakici M, Davutoglu V, Ozer O, Sari I, Ercan S et al. Relationship between mean platelet volume and atrial thrombus in patients with atrial fibrillation. Blood Coagulation &amp; Fibrinolysis. 2010;21(8):722–5. DOI: 10.1097/MBC.0b013e32833d6eda</mixed-citation><mixed-citation xml:lang="en">Yuce M, Cakici M, Davutoglu V, Ozer O, Sari I, Ercan S et al. Relationship between mean platelet volume and atrial thrombus in patients with atrial fibrillation. Blood Coagulation &amp; Fibrinolysis. 2010;21(8):722–5. DOI: 10.1097/MBC.0b013e32833d6eda</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>
