{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,28]],"date-time":"2026-03-28T09:56:15Z","timestamp":1774691775602,"version":"3.50.1"},"reference-count":10,"publisher":"Springer Science and Business Media LLC","issue":"4","license":[{"start":{"date-parts":[[2025,12,8]],"date-time":"2025-12-08T00:00:00Z","timestamp":1765152000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"},{"start":{"date-parts":[[2025,12,8]],"date-time":"2025-12-08T00:00:00Z","timestamp":1765152000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Gen Thorac Cardiovasc Surg"],"published-print":{"date-parts":[[2026,4]]},"DOI":"10.1007\/s11748-025-02236-w","type":"journal-article","created":{"date-parts":[[2025,12,8]],"date-time":"2025-12-08T08:34:46Z","timestamp":1765182886000},"page":"369-375","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Physiological assessment of endoscopic mitral valve repair using cardiopulmonary exercise testing"],"prefix":"10.1007","volume":"74","author":[{"given":"Takahiro","family":"Ozeki","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toshiaki","family":"Ito","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Soh","family":"Hosoba","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ayumi","family":"Shintani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mamoru","family":"Orii","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masayoshi","family":"Tokoro","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shinya","family":"Shimizu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sadanari","family":"Sawaki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akihiko","family":"Usui","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masato","family":"Mutsuga","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,12,8]]},"reference":[{"key":"2236_CR1","first-page":"e72","volume":"143","author":"CM Otto","year":"2021","unstructured":"Otto CM, Nishimura RA, Bonow RO, Carabello BA, Erwin JP III, Toly C, 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. Circulation. 2021;143:e72\u2013227.","journal-title":"Circulation"},{"key":"2236_CR2","doi-asserted-by":"publisher","first-page":"180","DOI":"10.1016\/j.ahj.2007.03.051","volume":"154","author":"J Mardric","year":"2007","unstructured":"Mardric J, Watripont P, Bartunek J, Casseleman F, Vanderheyden M, Bruyne B, et al. Effect of mitral valve repair on exercise tolerance in asymptomatic patients with organic mitral regurgitation. Am Heart J. 2007;154:180\u20135.","journal-title":"Am Heart J"},{"key":"2236_CR3","first-page":"368","volume":"100","author":"D Togna","year":"2013","unstructured":"Togna D, Abizaid A, Meneghelo R, Bihan D, Ramos A, Sousa A, et al. Effect of mitral valve repair on cardiopulmonary exercise testing variables in patients with chronic mitral regurgitation. Arq Bras Cardiol. 2013;100:368\u201375.","journal-title":"Arq Bras Cardiol"},{"key":"2236_CR4","doi-asserted-by":"publisher","first-page":"1187","DOI":"10.1016\/j.amjcard.2004.01.059","volume":"93","author":"JH Kim","year":"2004","unstructured":"Kim JH, Ahn JS, Park WS, Cho RB, Sung J, Hong PK, et al. Cardiopulmonary exercise testing before and one year after mitral valve repair for severe mitral regurgitation. Am J Cardiol. 2004;93:1187\u20139.","journal-title":"Am J Cardiol"},{"issue":"1","key":"2236_CR5","doi-asserted-by":"publisher","first-page":"23","DOI":"10.2165\/00007256-200030010-00003","volume":"30","author":"J Myers","year":"2000","unstructured":"Myers J, Bellin D. Ramp exercise protocols for clinical and cardiopulmonary testing. Sports Med. Jul; 2000;30(1):23\u20139.","journal-title":"Sports Med"},{"key":"2236_CR6","doi-asserted-by":"publisher","first-page":"2263","DOI":"10.1016\/S0735-1097(00)01015-9","volume":"36","author":"LT Tourneau","year":"2000","unstructured":"Tourneau LT, Groote P, Millaire A, Foucher C, Savoye C, Lablanche MJ, et al. Effect of mitral valve surgery on exercise capacity, ventricular ejection fraction and neurohormonal activation in patients with severe mitral regurgitation. J Am Coll Cardiol. 2000;36:2263\u20139.","journal-title":"J Am Coll Cardiol"},{"key":"2236_CR7","doi-asserted-by":"publisher","first-page":"35","DOI":"10.3904\/kjim.2003.18.1.35","volume":"18","author":"JH Kim","year":"2003","unstructured":"Kim JH, Park WS, Cho RB, Hong HS, Park WP, Hong PK. The role of cardiopulmonary exercise test in mitral and aortic regurgitation: it can predict post-operative results. Korean J Intern Med. 2003;18:35\u20139.","journal-title":"Korean J Intern Med"},{"key":"2236_CR8","first-page":"1","volume":"24","author":"K Doi","year":"2015","unstructured":"Doi K, Yamano T, Ohira S, Yamazaki S, Numata S, Yaku H. Annuloplasty ring size determines exercise-induced mitral stenosis severity after valve repair. J Heart Valve Dis. 2015;24:1\u20138.","journal-title":"J Heart Valve Dis"},{"key":"2236_CR9","doi-asserted-by":"publisher","first-page":"29","DOI":"10.1161\/01.CIR.27.1.29","volume":"1152","author":"E Braunwald","year":"1963","unstructured":"Braunwald E, Awe WC. The syndrome of severe mitral regurgitation with normal left atrial pressure. Circulation. 1963;1152:29\u201335.","journal-title":"Circulation"},{"key":"2236_CR10","doi-asserted-by":"publisher","first-page":"2752","DOI":"10.1016\/j.jtcvs.2014.07.029","volume":"148","author":"E Quintana","year":"2014","unstructured":"Quintana E, Suri MR, Thalji MN, Daly CR, Dearani AJ, Schaff VH, et al. Left ventricular dysfunction after mitral valve repair-the fallacy of normal preoperative myocardial function. J Thorac Cardiovasc Surg. 2014;148:2752\u201362.","journal-title":"J Thorac Cardiovasc Surg"}],"container-title":["General Thoracic and Cardiovascular Surgery"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s11748-025-02236-w.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s11748-025-02236-w","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s11748-025-02236-w.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,3,28]],"date-time":"2026-03-28T09:36:37Z","timestamp":1774690597000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s11748-025-02236-w"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12,8]]},"references-count":10,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2026,4]]}},"alternative-id":["2236"],"URL":"https:\/\/doi.org\/10.1007\/s11748-025-02236-w","relation":{},"ISSN":["1863-6705","1863-6713"],"issn-type":[{"value":"1863-6705","type":"print"},{"value":"1863-6713","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,12,8]]},"assertion":[{"value":"13 December 2024","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"17 October 2025","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"8 December 2025","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declares no conflict of interests.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interests"}}]}}