{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T09:49:48Z","timestamp":1790934588554,"version":"4.1.0"},"reference-count":16,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"7","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation"],"published-print":{"date-parts":[[1999,8,17]]},"abstract":"<jats:p>\n            <jats:italic>Background<\/jats:italic>\n            \u2014The prospective, randomized study comparing 4- with 8-mm tip electrodes for radiofrequency linear ablation of typical atrial flutter is not available.\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Methods and Results<\/jats:italic>\n            \u2014A total of 104 consecutive patients with typical atrial flutter were randomly assigned to undergo radiofrequency linear ablation using a 4- (Group I, n=54) or 8-mm tip electrode (Group II, n=50) catheter (temperature-control model, preset 70\u00b0C). If complete bidirectional isthmus block could not be achieved after 5 pulses, the ablation catheter was changed to the other type; the maximal radiofrequency pulse number was limited to &lt;10 pulses. Complete or incomplete isthmus conduction block was assessed by activation sequence in a multielectrode Halo catheter during low lateral right atrial and proximal coronary sinus pacing. Before shifting to the other catheter type, the 8-mm electrode catheter achieved higher complete isthmus block rate (92% versus 67%,\n            <jats:italic>P<\/jats:italic>\n            &lt;0.05) with fewer pulses (2\u00b11 versus 3\u00b11,\n            <jats:italic>P<\/jats:italic>\n            &lt;0.05), shorter procedure time (24\u00b115 versus 31\u00b112 minutes,\n            <jats:italic>P<\/jats:italic>\n            &lt;0.05), and shorter fluoroscopic time (14\u00b110 versus 23\u00b115 minutes,\n            <jats:italic>P<\/jats:italic>\n            &lt;0.05). After 5 failed ablation pulses, 12 (67%) of 18 patients in group I attained complete isthmus block by using an 8-mm tip catheter, but none of 4 patients in group II achieved complete block by changing to a 4-mm tip catheter.\n          <\/jats:p>\n          <jats:p>\n            <jats:italic>Conclusions<\/jats:italic>\n            \u2014The 8-mm tip electrodes are more effective than the standard 4-mm length electrodes in linear ablation for typical atrial flutter. This clinical benefit may be of particular value for some patients with broad and\/or thick isthmus.\n          <\/jats:p>","DOI":"10.1161\/01.cir.100.7.768","type":"journal-article","created":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T00:42:29Z","timestamp":1339461749000},"page":"768-771","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":108,"title":["Is 8-mm More Effective Than 4-mm Tip Electrode Catheter for Ablation of Typical Atrial Flutter?"],"prefix":"10.1161","volume":"100","author":[{"given":"Chin-Feng","family":"Tsai","sequence":"first","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ching-Tai","family":"Tai","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wen-Chung","family":"Yu","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi-Jen","family":"Chen","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming-Hsiung","family":"Hsieh","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chern-En","family":"Chiang","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu-An","family":"Ding","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mau-Song","family":"Chang","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shih-Ann","family":"Chen","sequence":"additional","affiliation":[{"name":"From the Division of Cardiology, Department of Medicine, National Yang-Ming University, School of Medicine, and Veterans General Hospital-Taipei and Division of Cardiology, Department of Medicine, Chung Shan Medical and Dental College Hospital (C.-F.T.), Taiwan, R.O.C."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","reference":[{"key":"e_1_3_3_1_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(86)90840-4"},{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.94.3.398"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(93)91014-9"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.90.6.7994824"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.89.3.8124793"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(95)00565-X"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.92.6.1389"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.93.2.284"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8167.1998.tb00892.x"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1990.tb02022.x"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.88.1.8319339"},{"key":"e_1_3_3_12_2","first-page":"123A","volume":"27","year":"1996","unstructured":"McRury 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