{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T13:26:59Z","timestamp":1791898019018,"version":"4.3.4"},"reference-count":15,"publisher":"BMJ","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Heart"],"accepted":{"date-parts":[[2000,9,4]]},"published-print":{"date-parts":[[2001,1,1]]},"abstract":"<jats:sec>\n                  <jats:title>OBJECTIVE<\/jats:title>\n                  <jats:p>To examine the cycle length of the junctional tachycardia often seen during successful slow pathway ablation for atrioventricular (AV) node re-entrant tachycardia, to determine whether shorter cycle lengths predict imminent atrioventricular block.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>DESIGN<\/jats:title>\n                  <jats:p>Retrospective analysis of consecutive patients undergoing slow pathway modification. Intracardiac recordings were analysed after digital storage to determine the development of junctional tachycardia, its duration and maximum, minimum, and mean cycle length, occurrence of heart block, persistent slow pathway conduction, or later confirmed recurrence of AV node re-entrant tachycardia.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>SETTING<\/jats:title>\n                  <jats:p>Regional cardiac centre.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>PATIENTS<\/jats:title>\n                  <jats:p>136 consecutive patients undergoing electrophysiological study found to have typical \u201cslow-fast\u201d AV node re-entrant tachycardia and subject to 137 slow pathway modification procedures.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>RESULTS<\/jats:title>\n                  <jats:p>During successful temperature feedback controlled radiofrequency energy application, junctional tachycardia developed in 133 of 137 procedures. During ablation, 10 patients had evidence of AV block (first degree in seven patients and third degree in three), and 17 others had retrograde junctional atrial (JA) block. In these 27 patients, the junctional tachycardia was rapid, with a minimum (SD) cycle length 291 (47)\u2009ms. Conduction recovered quickly in all but two patients, one of whom required permanent pacing. Junctional tachycardia with normal AV and JA conduction in the other 111 patients was of a significantly slower minimum cycle length (537 (123)\u2009ms; p\u2009&lt;\u20090.0001).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>CONCLUSIONS<\/jats:title>\n                  <jats:p>Fast junctional tachycardia with cycle lengths under 350\u2009ms seen during slow pathway modification is a predictor of conduction block, suggesting proximity to the compact node. Radiofrequency energy application should be terminated immediately to prevent development of AV block. An \u201cauto cut off\u201d facility for cycle lengths shorter than 350\u2009ms could be built into radiofrequency ablation systems to increase safety.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/heart.85.1.44","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T06:37:59Z","timestamp":1027751879000},"page":"44-47","source":"Crossref","is-referenced-by-count":30,"title":["Slow pathway modification for atrioventricular node re-entrant tachycardia: fast junctional tachycardia predicts adverse prognosis"],"prefix":"10.1136","volume":"85","author":[{"given":"K J","family":"Lipscomb","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A M","family":"Zaidi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A P","family":"Fitzpatrick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D","family":"LEFROY","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2001,1,1]]},"reference":[{"key":"2025101715002462000_85.1.44.1","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.85.5.1675"},{"key":"2025101715002462000_85.1.44.2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(92)90732-E"},{"key":"2025101715002462000_85.1.44.3","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.85.4.1318"},{"key":"2025101715002462000_85.1.44.4","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM199207303270504"},{"key":"2025101715002462000_85.1.44.5","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1093\/oxfordjournals.eurheartj.a014696","article-title":"Incidence of complete atrioventricular block following attempted radiofrequency catheter modification of the atrioventricular node in 880 patients. Results of the Multicentre European Radiofrequency Survey (MERFS), the working group on arrhythmias of the European Society of Cardiology.","volume":"17","author":"Hindricks","year":"1996","journal-title":"Eur Heart J"},{"key":"2025101715002462000_85.1.44.6","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.90.6.2820"},{"key":"2025101715002462000_85.1.44.7","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(93)90600-6"},{"key":"2025101715002462000_85.1.44.8","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9149(97)00424-4"},{"key":"2025101715002462000_85.1.44.9","first-page":"977","article-title":"Junctional arrhythmias in radiofrequency modification of the atrioventricular node.","volume":"84","author":"Schumacher","year":"1995","journal-title":"Z Kardiol"},{"key":"2025101715002462000_85.1.44.10","doi-asserted-by":"crossref","first-page":"623","DOI":"10.1111\/j.1540-8159.1993.tb01634.x","article-title":"Electrophysiological behaviour of the atrioventricular node after selective fast or slow pathway ablation in patients with atrioventricular nodal reentrant tachycardia.","volume":"16","author":"Jazayeri","year":"1993","journal-title":"PACE"},{"key":"2025101715002462000_85.1.44.11","doi-asserted-by":"crossref","first-page":"552","DOI":"10.1111\/j.1540-8159.1997.tb06210.x","article-title":"Atrioventricular node reentry: physiology and radiofrequency ablation.","volume":"20","author":"Prystowsky","year":"1997","journal-title":"PACE"},{"key":"2025101715002462000_85.1.44.12","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(91)90516-C"},{"key":"2025101715002462000_85.1.44.13","doi-asserted-by":"crossref","first-page":"2815","DOI":"10.1161\/01.CIR.90.6.2815","article-title":"Radiofrequency ablation of slow pathway in patients with atrioventricular nodal reentrant tachycardia. Do arrhythmia recurrences correlate with persistent slow pathway conduction or site of successful ablation?","volume":"90","author":"Manolis","year":"1994","journal-title":"Circulation"},{"key":"2025101715002462000_85.1.44.14","doi-asserted-by":"crossref","first-page":"1654","DOI":"10.1111\/j.1540-8159.1997.tb03535.x","article-title":"Spontaneous accelerated junctional rhythm: an unusual but useful observation prior to radiofrequency catheter ablation for atrioventricular node reentrant tachycardia in young patients.","volume":"20","author":"Epstein","year":"1997","journal-title":"PACE"},{"key":"2025101715002462000_85.1.44.15","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9149(96)00209-3"}],"container-title":["Heart"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/heart.85.1.44","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,17]],"date-time":"2025-10-17T22:00:34Z","timestamp":1760738434000},"score":1,"resource":{"primary":{"URL":"https:\/\/heart.bmj.com\/lookup\/doi\/10.1136\/heart.85.1.44"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2001,1,1]]},"references-count":15,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2001,1,1]]},"published-print":{"date-parts":[[2001,1,1]]}},"alternative-id":["10.1136\/heart.85.1.44"],"URL":"https:\/\/doi.org\/10.1136\/heart.85.1.44","relation":{},"ISSN":["1355-6037","1468-201X"],"issn-type":[{"value":"1355-6037","type":"print"},{"value":"1468-201X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2001,1,1]]}}}