{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T09:25:27Z","timestamp":1783070727968,"version":"3.54.6"},"reference-count":24,"publisher":"Wiley","issue":"17","license":[{"start":{"date-parts":[[2023,9,9]],"date-time":"2023-09-09T00:00:00Z","timestamp":1694217600000},"content-version":"vor","delay-in-days":8,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["physoc.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiological Reports"],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The ventriculo\u2010arterial coupling (VAC) and left ventricle (LV) mechanics are crucial and play an important role in the pathophysiology of aortic stenosis (AS). The pressure\u2010volume (PV) analysis is a powerful tool to study VAC and LV mechanics. We proposed a novel minimally\u2010invasive method for PV analysis in patients with severe AS receiving transcatheter aortic valve implantation (TAVI). Patients with severe AS were prospectively enrolled in a single center. LV pressure and cardiac output were recorded before and after TAVI. We constructed the PV loop for analysis by analyzing LV pressure and the assumed flow. 26 patients were included for final analysis. The effective arterial elastance (Ea) decreased after TAVI (3.7\u2009\u00b1\u20091.3 vs. 2.9\u2009\u00b1\u20091.1\u2009mmHg\/mL, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). The LV end\u2010systolic elastance (Ees) did not change immediately after TAVI (2.4\u2009\u00b1\u20091.3 vs. 2.6\u2009\u00b1\u20091.1\u2009mmHg\/mL, <jats:italic>p<\/jats:italic>\u2009=\u20090.3670). The Ea\/Ees improved after TAVI (1.8\u2009\u00b1\u20090.8 vs. 1.2\u2009\u00b1\u20090.4, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001), demonstrating an immediate improvement of VAC. The stroke work (SW) did not change (7669.6\u2009\u00b1\u20091913.8 vs. 7626.2\u2009\u00b1\u20092546.9, <jats:italic>p<\/jats:italic>\u2009=\u20090.9330), but the pressure\u2010volume area (PVA) decreased (14469.0\u2009\u00b1\u20094974.1 vs. 12177.4\u2009\u00b1\u20094499.9, <jats:italic>p<\/jats:italic>\u2009=\u20090.0374) after TAVI. The SW\/PVA increased after TAVI (0.55\u2009\u00b1\u20090.12 vs. 0.63\u2009\u00b1\u20090.08, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001) representing an improvement of LV efficiency. We proposed a novel minimally invasive method for PV analysis in patients with severe AS receiving TAVI. The VAC and LV efficiency improved immediately after TAVI.<\/jats:p>","DOI":"10.14814\/phy2.15799","type":"journal-article","created":{"date-parts":[[2023,9,9]],"date-time":"2023-09-09T07:34:30Z","timestamp":1694244870000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Quantification of cardiac pumping mechanics in <scp>TAVI<\/scp> patients: A pilot study utilizing minimally invasive method for pressure\u2010volume analysis"],"prefix":"10.14814","volume":"11","author":[{"given":"Tsung\u2010Yu","family":"Ko","sequence":"first","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"},{"name":"Graduate Institute of Clinical Medicine National Taiwan University  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chia\u2010Chuan","family":"Chuang","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mao\u2010Shin","family":"Lin","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi\u2010Chang","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Radiology National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying\u2010Hsien","family":"Chen","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ching\u2010Chang","family":"Huang","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chih\u2010Fan","family":"Yeh","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming\u2010Jiuh","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kuo\u2010Chu","family":"Chang","sequence":"additional","affiliation":[{"name":"Department of Physiology, College of Medicine National Taiwan University  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi\u2010Lwun","family":"Ho","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5278-3540","authenticated-orcid":false,"given":"Hsien\u2010Li","family":"Kao","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Internal Medicine and Cardiovascular Center National Taiwan University Hospital  Taipei 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