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Otsuji Y, Handschumacher MD, Liel-Cohen N, Tanabe H, Jiang L, Schwammenthal E, et al. Mechanism of ischemic mitral regurgitation with segmental left ventricular dysfunction: Three-dimensional echocardiographic studies in models of acute and chronic progressive regurgitation. <i>J Am Coll Cardiol<\/i> 2001; 37: 641\u2013648.","DOI":"10.1016\/S0735-1097(00)01134-7"},{"key":"2","doi-asserted-by":"crossref","unstructured":"2. Otsuji Y, Handschumacher MD, Schwammenthal E, Jiang L, Song JK, Guerrero JL, et al. Insights from three-dimensional echocardiography into the mechanism of functional mitral regurgitation: Direct in vivo demonstration of altered leaflet tethering geometry. <i>Circulation<\/i> 1997; 96: 1999\u20132008.","DOI":"10.1161\/01.CIR.96.6.1999"},{"key":"3","doi-asserted-by":"crossref","unstructured":"3. Uemura T, Otsuji Y, Nakashiki K, Yoshifuku S, Maki Y, Yu B, et al. 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Ito K, Abe Y, Takahashi Y, Shimada Y, Fukuoto H, Matsumura Y, et al. Mechanism of atrial functional mitral regurgitation in patients with atrial fibrillation: A study using three-dimensional transesophageal echocardiography. <i>J Cardiol<\/i> 2017; 70: 584\u2013590.","DOI":"10.1016\/j.jjcc.2017.03.013"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7. Kagiyama N, Mondillo S, Yoshida K, Mandoli GE, Cameli M. Subtypes of atrial functional mitral regurgitation: Imaging insights into their mechanisms and therapeutic implications. <i>JACC Cardiovasc Imaging<\/i> 2020; 13: 820\u2013835.","DOI":"10.1016\/j.jcmg.2019.01.040"},{"key":"8","doi-asserted-by":"crossref","unstructured":"8. Omote K, Borlaug BA. Left atrial myopathy in heart failure with preserved ejection fraction. <i>Circ J<\/i> 2023; 87: 1039\u20131046.","DOI":"10.1253\/circj.CJ-21-0795"},{"key":"9","doi-asserted-by":"crossref","unstructured":"9. Inoue K. the left atrium is a window to the outcomes of patients with atrial fibrillation. <i>Circ J<\/i> 2024; 88: 1165\u20131166.","DOI":"10.1253\/circj.CJ-23-0788"},{"key":"10","doi-asserted-by":"crossref","unstructured":"10. Farhan S, Silbiger JJ, Halperin JL, Zhang L, Dukkipati SR, Vogel B, et al. Pathophysiology, echocardiographic diagnosis, and treatment of atrial functional mitral regurgitation: JACC state-of-the-art review. <i>J Am Coll Cardiol<\/i> 2022; 80: 2314\u20132330.","DOI":"10.1016\/j.jacc.2022.09.046"},{"key":"11","doi-asserted-by":"crossref","unstructured":"11. Silbiger JJ. Mechanistic insights into atrial functional mitral regurgitation: Far more complicated than just left atrial remodeling. <i>Echocardiography<\/i> 2019; 36: 164\u2013169.","DOI":"10.1111\/echo.14249"},{"key":"12","doi-asserted-by":"crossref","unstructured":"12. Kagiyama N, Kaneko T, Amano M, Sato Y, Ohno Y, Obokata M, et al. Clinical outcomes of mitral valve surgery in atrial functional mitral regurgitation in the REVEAL-AFMR Registry. <i>JAMA Netw Open<\/i> 2024; 7: e2428032.","DOI":"10.1001\/jamanetworkopen.2024.28032"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Wiegers SE, Ryan T, Arrighi JA, Brown SM, Canaday B, Damp JB, et al. 2019 ACC\/AHA\/ASE advanced training statement on echocardiography (revision of the 2003 ACC\/AHA clinical competence statement on echocardiography): A report of the ACC Competency Management Committee. <i>J Am Soc Echocardiogr<\/i> 2019; 32: 919\u2013943.","DOI":"10.1161\/HCI.0000000000000026"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Daimon M, Watanabe H, Abe Y, Hirata K, Hozumi T, Ishii K, et al. Normal values of echocardiographic parameters in relation to age in a healthy Japanese population: The JAMP study. <i>Circ J<\/i> 2008; 72: 1859\u20131866.","DOI":"10.1253\/circj.CJ-08-0171"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Akamatsu K, Abe Y, Matsumura Y, Shimeno K, Naruko T, Takahashi Y, et al. Etiology of atrial functional mitral regurgitation: Insights from transthoracic echocardiography in 159 consecutive patients with atrial fibrillation and preserved left ventricular ejection fraction. <i>Cardiology<\/i> 2020; 145: 511\u2013521.","DOI":"10.1159\/000508279"},{"key":"16","doi-asserted-by":"crossref","unstructured":"16. Zoghbi WA, Levine RA, Flachskampf F, Grayburn P, Gillam L, Leipsic J, et al. Atrial functional mitral regurgitation: A JACC: Cardiovascular Imaging Expert Panel viewpoint. <i>JACC Cardiovasc Imaging<\/i> 2022; 15: 1870\u20131882.","DOI":"10.1016\/j.jcmg.2022.08.016"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Austin PC. An introduction to propensity score methods for reducing the effects of confounding in observational studies. <i>Multivariate Behav Res<\/i> 2011; 46: 399\u2013424.","DOI":"10.1080\/00273171.2011.568786"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Silbiger JJ. Does left atrial enlargement contribute to mitral leaflet tethering in patients with functional mitral regurgitation? Proposed role of atriogenic leaflet tethering. <i>Echocardiography<\/i> 2014; 31: 1310\u20131311.","DOI":"10.1111\/echo.12629"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. Machino-Ohtsuka T, Seo Y, Ishizu T, Sato K, Sugano A, Yamamoto M, et al. Novel mechanistic insights into atrial functional mitral regurgitation: 3-dimensional echocardiographic study. <i>Circ J<\/i> 2016; 80: 2240\u20132248.","DOI":"10.1253\/circj.CJ-16-0435"},{"key":"20","doi-asserted-by":"crossref","unstructured":"20. Lang RM, Badano LP, Mor-Avi V, Afilalo J, Armstrong A, Ernande L, L et al. Recommendations for cardiac chamber quantification by echocardiography in adults: An update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. <i>J Am Soc Echocardiogr<\/i> 2015; 28: 1\u201339.e14.","DOI":"10.1016\/j.echo.2014.10.003"},{"key":"21","doi-asserted-by":"crossref","unstructured":"21. Otto CM, Nishimura RA, Bonow RO, Carabello BA, Erwin JP 3rd, Gentile F, et al. 2020 ACC\/AHA Guideline for the management of patients with valvular heart disease: A report of the American College of Cardiology\/American Heart Association Joint Committee on Clinical Practice Guidelines. <i>Circulation<\/i> 2021; 143: e72\u2013e227.","DOI":"10.1161\/CIR.0000000000000923"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22. Vahanian A, Beyersdorf F, Praz F, Milojevic M, Baldus S, Bauersachs J, et al. 2021 ESC\/EACTS Guidelines for the management of valvular heart disease. <i>Eur Heart J<\/i> 2022; 43: 561\u2013632.","DOI":"10.1093\/ejcts\/ezac209"},{"key":"23","doi-asserted-by":"crossref","unstructured":"23. Izumi C, Eishi K, Ashihara K, Arita T, Otsuji Y, Kunihara T, et al. JCS\/JSCS\/JATS\/JSVS 2020 Guidelines on the management of valvular heart disease. <i>Circ J<\/i> 2020; 84: 2037\u20132119.","DOI":"10.1253\/circj.CJ-20-0135"},{"key":"24","doi-asserted-by":"crossref","unstructured":"24. Abe Y, Akamatsu K, Ito K, Matsumura Y, Shimeno K, Naruko T, et al. Prevalence and prognostic significance of functional mitral and tricuspid regurgitation despite preserved left ventricular ejection fraction in atrial fibrillation patients. <i>Circ J<\/i> 2018; 82: 1451\u20131458.","DOI":"10.1253\/circj.CJ-17-1334"},{"key":"25","doi-asserted-by":"crossref","unstructured":"25. Hasegawa H, Kuwajima K, Kagawa S, Yamane T, Rader F, Siegel RJ, et al. Impact of eccentric jet on outcomes in patients with atrial functional mitral regurgitation: An echocardiographic study. <i>Int J Cardiol<\/i> 2023; 391: 131342.","DOI":"10.1016\/j.ijcard.2023.131342"},{"key":"26","doi-asserted-by":"crossref","unstructured":"26. Hiasa KI, Kaku H, Inoue H, Yamashita T, Akao M, Atarashi H, et al. 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