{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,20]],"date-time":"2025-09-20T18:57:22Z","timestamp":1758394642388},"reference-count":20,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2004,12,13]],"date-time":"2004-12-13T00:00:00Z","timestamp":1102896000000},"content-version":"vor","delay-in-days":12,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2004,12]]},"abstract":"<jats:p> <jats:italic>Introduction:<\/jats:italic> The activation sequence in typical atrial flutter (AFL) around the tricuspid annulus is well described. However, activation of the remainder of the right atrium (RA) is not well defined. Previous studies have shown a linear block at the crista terminalis (CT) during AFL. The aim of this study was to evaluate the relationship between the location of the CT and the line of block by intracardiac echocardiography (ICE).<\/jats:p><jats:p> <jats:italic>Methods and Results:<\/jats:italic> Twenty\u2010one patients with typical AFL were included in the study. The ICE imaging catheter (9\u2010French with 9\u2010MHz ultrasound transducer) was advanced to the RA. Under ICE guidance, a 20\u2010pole roving catheter was used to map double potentials (DPs) during AFL, and three\u2010dimensional images of the RA were reconstructed. During counterclockwise (CCW), clockwise (CW) AFL, or both, a line of conduction block manifested by DPs was identified at a septal site adjacent to the CT in 12 patients and in the posteroseptal RA in 9 patients.<\/jats:p><jats:p> <jats:italic>Conclusion:<\/jats:italic> The functional line of block in CCW and CW AFL is localized not at the CT but at the septal edge of the CT or in the posteroseptal RA.<\/jats:p>","DOI":"10.1046\/j.1540-8167.2004.04379.x","type":"journal-article","created":{"date-parts":[[2004,12,13]],"date-time":"2004-12-13T22:54:30Z","timestamp":1102978470000},"page":"1426-1432","source":"Crossref","is-referenced-by-count":13,"title":["Relationship Between Anatomic Location of the Crista Terminalis and Double Potentials Recorded During Atrial 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