{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T00:54:58Z","timestamp":1777769698125,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2008,10,29]],"date-time":"2008-10-29T00:00:00Z","timestamp":1225238400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2008,10,29]],"date-time":"2008-10-29T00:00:00Z","timestamp":1225238400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiology"],"abstract":"<jats:p>Atrial vectorcardiograms (P sSPACE-loops) were recorded at high gain from 19 adult patients with mitral valve disease and enlargement of the left atrium using the equilateral tetrahedral reference frame. The P sSPACE-loops of the patients with mitral valve disease differed from P sSPACE-loops of 39 normal subjects in that (1) they were more distorted and contained a large number of high frequency components, (2) in the transverse plane projection they were more \u2018open\u2019 in appearance and enclosed a larger area when they were not of figure-of-eight configuration, and (3) those with a figure-of-eight configuration had maximal mean instantaneous vectors (MMIV) which were definitely abnormal. Catheterization data from seven patients failed to show a significant relationship with configuration of the P sSPACE-loops.<\/jats:p>","DOI":"10.1159\/000169620","type":"journal-article","created":{"date-parts":[[2008,10,29]],"date-time":"2008-10-29T11:30:15Z","timestamp":1225279815000},"page":"80-88","source":"Crossref","is-referenced-by-count":4,"title":["Atrial Vectorcardiogram in Mitral Valve Disease"],"prefix":"10.1159","author":[{"given":"G.E.","family":"Burch","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T.D.","family":"Giles","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2008,10,29]]},"container-title":["Cardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/169620","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000169620","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T16:21:18Z","timestamp":1777479678000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000169620"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,10,29]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000169620","archive":["Portico"],"relation":{},"ISSN":["0008-6312","1421-9751"],"issn-type":[{"value":"0008-6312","type":"print"},{"value":"1421-9751","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,10,29]]}}}