{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T17:14:17Z","timestamp":1792343657084,"version":"4.4.0"},"reference-count":20,"publisher":"Oxford University Press (OUP)","issue":"3","license":[{"start":{"date-parts":[[2021,5,8]],"date-time":"2021-05-08T00:00:00Z","timestamp":1620432000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,8,18]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>\u2002<\/jats:title>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>OBJECTIVES<\/jats:title>\n                  <jats:p>It is difficult to estimate the improvement in left ventricular (LV) function after aortic valve replacement (AVR). The present study aimed to evaluate whether energy loss (EL) can predict the postoperative LV function after AVR.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>METHODS<\/jats:title>\n                  <jats:p>Nine patients who underwent AVR with a bioprosthetic valve were enrolled in the present study. Porcine prostheses were used in 5 patients and bovine pericardial prostheses were used in 4 patients. The aortic flow pattern was visualized and EL and cardiac output (CO) were measured using 4-dimensional flow magnetic resonance imaging from the LV to the descending aorta; the EL\/CO ratio in the extracted area was calculated as total EL\/CO ratio.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>RESULTS<\/jats:title>\n                  <jats:p>With a porcine valve, a severe helical flow was observed in the ascending aorta during the holosystolic phase. In contrast, with a bovine pericardial valve, straight transvalvular aortic flow was observed in the early systolic phase and 2 large vortical flows occurred on both sides of the greater and lesser curvature of the ascending aorta after the mid-systolic period. The total EL\/CO ratio was strongly correlated with LV ejection fraction improvement after AVR (r\u2009=\u20090.74, P\u2009=\u20090.02).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>CONCLUSIONS<\/jats:title>\n                  <jats:p>The aortic flow pattern is different between the porcine valve and bovine pericardial valve. The total EL\/CO ratio is a valuable tool for evaluating the postoperative LV ejection fraction improvement after AVR. Optimization of total EL\/CO ratio would have potential to improve haemodynamic performances after AVR.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/icvts\/ivab094","type":"journal-article","created":{"date-parts":[[2021,4,18]],"date-time":"2021-04-18T19:06:48Z","timestamp":1618772808000},"page":"339-347","source":"Crossref","is-referenced-by-count":11,"title":["Blood flow energy loss: a predictor for the recovery of left ventricular function after bioprosthetic aortic valve replacement"],"prefix":"10.1093","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0112-4278","authenticated-orcid":false,"given":"Yu","family":"Hohri","sequence":"first","affiliation":[{"name":"Department of Cardiovascular Surgery, Cardiovascular Blood Flow Imaging Research Laboratory, Kyoto Prefectural University of Medicine, Kyoto, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keiichi","family":"Itatani","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Surgery, Cardiovascular Blood Flow Imaging Research Laboratory, Kyoto Prefectural University of Medicine, Kyoto, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Numata","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Surgery, Cardiovascular Blood Flow Imaging Research Laboratory, Kyoto Prefectural University of Medicine, Kyoto, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sachiko","family":"Yamazaki","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Surgery, Cardiovascular Blood Flow Imaging Research Laboratory, Kyoto Prefectural University of Medicine, Kyoto, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shohei","family":"Miyazaki","sequence":"additional","affiliation":[{"name":"Cardio Flow Design Inc., Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teruyasu","family":"Nishino","sequence":"additional","affiliation":[{"name":"Cardio Flow Design Inc., Tokyo, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5581-5851","authenticated-orcid":false,"given":"Hitoshi","family":"Yaku","sequence":"additional","affiliation":[{"name":"Department of Cardiovascular Surgery, Cardiovascular Blood Flow Imaging Research Laboratory, Kyoto Prefectural University of Medicine, Kyoto, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2021,5,8]]},"reference":[{"key":"2022030915262852700_ivab094-B1","doi-asserted-by":"crossref","first-page":"2183","DOI":"10.1093\/eurheartj\/ehx141","article-title":"Mechanical versus bioprosthetic aortic valve replacement","volume":"38","author":"Head","year":"2017","journal-title":"Eur Heart J"},{"key":"2022030915262852700_ivab094-B2","doi-asserted-by":"crossref","first-page":"1067","DOI":"10.1093\/ejcts\/ezu307","article-title":"A comparison of outcomes between bovine pericardial and porcine valves in 38,040 patients in England and Wales over 10 years","volume":"47","author":"Hickey","year":"2015","journal-title":"Eur J Cardiothorac Surg"},{"key":"2022030915262852700_ivab094-B3","doi-asserted-by":"crossref","first-page":"557","DOI":"10.1093\/ejcts\/ezu466","article-title":"Comparable long-term results for porcine and pericardial prostheses after isolated aortic valve replacement","volume":"48","author":"Andreas","year":"2015","journal-title":"Eur J Cardiothorac Surg"},{"key":"2022030915262852700_ivab094-B4","doi-asserted-by":"crossref","first-page":"2395","DOI":"10.1161\/01.CIR.95.10.2395","article-title":"Aortic valve replacement for aortic stenosis with severe left ventricular dysfunction. 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