{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T01:07:58Z","timestamp":1777770478910,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2008,11,14]],"date-time":"2008-11-14T00:00:00Z","timestamp":1226620800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2008,11,14]],"date-time":"2008-11-14T00:00:00Z","timestamp":1226620800000},"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>There are two different theories to explain the mechanism of concealed bigeminy: one is \u20182:1 concealed reentry\u2019; the other is \u2018irregular parasystole.\u2019 Two exemplary cases of the even-number variant of concealed bigeminy are presented. In case 1 the mechanism can be explained by an irregular parasystole due to a modulated parasystole; however, findings during temporary sinus arrest caused by vagal stimulation indicate that this case is not governed by a parasystole, but by a 2:1 concealed reentry. In case 2, the mechanism can be explained by a 2:1 concealed reentry without parasystole; however, findings during temporary sinus arrest indicate that this case is governed by an irregular parasystole due to a type-I second-degree entrance block. Thus, in cases of concealed bigeminy without pure ectopic cycles, it does not seem easy to explain the mechanism of concealed bigeminy on the theory of a modulated parasystole.<\/jats:p>","DOI":"10.1159\/000175783","type":"journal-article","created":{"date-parts":[[2008,11,14]],"date-time":"2008-11-14T07:50:46Z","timestamp":1226649046000},"page":"100-106","source":"Crossref","is-referenced-by-count":11,"title":["Differentiation between Parasystole and Reentry in Concealed Bigeminy"],"prefix":"10.1159","author":[{"given":"Shinji","family":"Kinoshita","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Go","family":"Konishi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fumihiko","family":"Okada","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2008,11,14]]},"container-title":["Cardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000175783","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T16:35:11Z","timestamp":1777480511000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000175783"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,11,14]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000175783","archive":["Portico"],"relation":{},"ISSN":["0008-6312","1421-9751"],"issn-type":[{"value":"0008-6312","type":"print"},{"value":"1421-9751","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,11,14]]}}}