{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T01:01:42Z","timestamp":1777770102592,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2008,11,11]],"date-time":"2008-11-11T00:00:00Z","timestamp":1226361600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2008,11,11]],"date-time":"2008-11-11T00:00:00Z","timestamp":1226361600000},"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>Following exercise testing, a 71 -year-old man developed atrial tachycardia with a unusual form of conduction disturbance: 4:2 atrioventricular (A-V) block. This pattern of A-V block is explainable by two different mechanisms of concealed conduction: two different levels of block in the A-V nodal region and dual A-V nodal pathways with concealed retrograde conduction of P waves. These concepts can also explain a variety of other unusual conduction disturbances.<\/jats:p>","DOI":"10.1159\/000173992","type":"journal-article","created":{"date-parts":[[2008,11,12]],"date-time":"2008-11-12T08:17:04Z","timestamp":1226477824000},"page":"111-114","source":"Crossref","is-referenced-by-count":1,"title":["Atypical Wenckebach Block and Concealed Conduction"],"prefix":"10.1159","author":[{"given":"Victor S.","family":"Wayne","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richard W.","family":"Harper","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Richard L.","family":"Bishop","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David H.","family":"Spodick","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2008,11,11]]},"container-title":["Cardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000173992","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T16:28:43Z","timestamp":1777480123000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000173992"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,11,11]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000173992","archive":["Portico"],"relation":{},"ISSN":["0008-6312","1421-9751"],"issn-type":[{"value":"0008-6312","type":"print"},{"value":"1421-9751","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,11,11]]}}}