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Higuchi R, Nanasato M, Hosoya Y, Isobe M; J-PVAD Investigators. Outcomes of older patients with cardiogenic shock using the Impella device: Insights from the Japanese registry for percutaneous ventricular assist device (J-PVAD). <i>Circ Rep<\/i> 2024; 6: 505\u2013513.","DOI":"10.1253\/circrep.CR-24-0111"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5. Yamada H, Ohara T, Abe Y, Iwano H, Onishi T, Katabami K, et al. Guidance for performance, utilization, and education of cardiac and lung point-of-care ultrasonography from the Japanese Society of Echocardiography. <i>J Echocardiogr<\/i> 2024; 22: 113\u2013151.","DOI":"10.1007\/s12574-024-00649-9"},{"key":"6","doi-asserted-by":"crossref","unstructured":"6. Kitai T, Kohsaka S, Kato T, Kato E, Sato K, Teramoto K, et al. JCS\/JHFS 2025 guideline on diagnosis and treatment of heart failure. <i>Circ J<\/i> 2025; 89: 1278\u20131444.","DOI":"10.1253\/circj.CJ-25-0002"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7. 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Diagnostic accuracy of point-of-care ultrasound for shock: A systematic review and meta-analysis. <i>Crit Care<\/i> 2023; 27: 200.","DOI":"10.1186\/s13054-023-04495-6"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Page MJ, McKenzie JE, Bossuyt PM, Boutron I, Hoffmann TC, Mulrow CD, et al. The PRISMA 2020 statement: An updated guideline for reporting systematic reviews. <i>BMJ<\/i> 2021; 372: n71.","DOI":"10.1136\/bmj.n71"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Sterne JAC, Savovi\u0107 J, Page MJ, Elbers RG, Blencowe NS, Boutron I, et al. RoB 2: A revised tool for assessing risk of bias in randomised trials. <i>BMJ<\/i> 2019; 366: l4898.","DOI":"10.1136\/bmj.l4898"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Sterne JA, Hern\u00e1n MA, Reeves BC, Savovi\u0107 J, Berkman ND, Viswanathan M, et al. 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Takotsubo syndrome in older men: Clinical characteristics differ by sex and age. <i>Circ Rep<\/i> 2024; 6: 201\u2013208.","DOI":"10.1253\/circrep.CR-23-0093"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22. Kato K, Di Vece D, Kitagawa M, Yamamoto K, Aoki S, Goto H, et al. Cardiogenic shock in takotsubo syndrome: Etiology and treatment. <i>Cardiovasc Interv Ther<\/i> 2024; 39: 421\u2013427.","DOI":"10.1007\/s12928-024-01031-3"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23. Marrazzo G, Palermi S, Pastore F, Ragni M, Mauriello A, Zambrano A, et al. Enhancing ST-elevation myocardial infarction diagnosis and management: The integral role of echocardiography in patients rushed to the cardiac catheterization laboratory. <i>J Clin Med<\/i> 2024; 13: 1425.","DOI":"10.3390\/jcm13051425"},{"key":"24","doi-asserted-by":"crossref","unstructured":"24. Chawla TP, Cresswell M, Dhillon S, Greer MLC, Hartery A, Keough V, et al. 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