{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T20:07:38Z","timestamp":1784318858403,"version":"3.55.0"},"reference-count":24,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2020,10,8]],"date-time":"2020-10-08T00:00:00Z","timestamp":1602115200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Arrhythmia"],"published-print":{"date-parts":[[2020,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>High\u2010power (HP) ablation protocols are increasingly used for ablation procedures to shorten procedural times and improve short\u2010 and long\u2010term success. The ablation index (AI) combines contact force, power settings, and ablation time. It can be used in combination with HP protocols to guide operators toward standardized lesions. The purpose of this study was to evaluate both a HP and AI\u2010guided strategy for ablation of the cavotricuspid isthmus (CTI) in patients with typical atrial flutter (AFL).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this single\u2010center study, consecutive patients with typical AFL (n\u00a0=\u00a052, mean age 68.7\u00a0\u00b1\u00a08.3\u00a0years, 21\/52 [40.4%] female) underwent AI\u2010guided HP radiofrequency (RF) ablation of the CTI. Ablation was performed with 50\u00a0W and AI target values of 550 with a maximum ablation duration of 25\u00a0seconds\u00a0per lesion. Target interlesion distance was \u22646\u00a0mm. Ablation was performed with a 3.5\u00a0mm porous tip Smarttouch SF catheter.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Acute CTI block was achieved in 52 of 52 patients (100%), and first\u2010pass conduction block was achieved in 41 of 52 patients (80.4%). Spontaneous reconduction after 30\u00a0minutes waiting time occurred in 1 of 52 (1.9%) patient. Average ablation time until CTI block was 3:51\u00a0\u00b1\u00a01:40; 2:33\u00a0\u00b1\u00a01:01\u00a0minutes of bonus ablation pulses were applied after CTI block. An audible steam pop was noted in one patient (1.9%). No major complications occurred. After a mean follow\u2010up of 193.7\u00a0\u00b1\u00a0152.2\u00a0days, no patient showed recurrence of typical AFL.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>In this pilot study, AI\u2010guided HP ablation of the CTI was fast, safe, and effective.<\/jats:p><\/jats:sec>","DOI":"10.1002\/joa3.12443","type":"journal-article","created":{"date-parts":[[2020,10,8]],"date-time":"2020-10-08T18:16:35Z","timestamp":1602180995000},"page":"1045-1050","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["The use of a high\u2010power (50\u00a0W), ablation index\u2010guided protocol for ablation of the cavotricuspid isthmus"],"prefix":"10.1002","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2748-2540","authenticated-orcid":false,"given":"Verena","family":"Tscholl","sequence":"first","affiliation":[{"name":"Department of Cardiology Charit\u00e9 Universitaetsmedizin Berlin, Campus 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