{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T13:32:56Z","timestamp":1792589576913,"version":"4.5.0"},"reference-count":44,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2005,9,28]],"date-time":"2005-09-28T00:00:00Z","timestamp":1127865600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2005,11]]},"abstract":"<jats:p>\n                    <jats:italic>Background:<\/jats:italic>\n                    The relative contributions of different atrial regions to the maintenance of persistent atrial fibrillation (AF) are not known.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Methods:<\/jats:italic>\n                    Sixty patients (53 \u00b1 9 years) undergoing catheter ablation of persistent AF (17 \u00b1 27 months) were studied. Ablation was performed in a randomized sequence at different left atrial (LA) regions and comprised isolation of the pulmonary veins (PV), isolation of other thoracic veins, and atrial tissue ablation targeting all regions with rapid or heterogeneous activation or guided by activation mapping. Finally, linear ablation at the roof and mitral isthmus was performed if sinus rhythm was not restored after addressing the above\u2010mentioned areas. The impact of ablation was evaluated by the effect on the fibrillatory cycle length in the coronary sinus and appendages at each step. Activation mapping and entrainment maneuvers were used to define the mechanisms and locations of intermediate focal or macroreentrant atrial tachycardias.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Results:<\/jats:italic>\n                    AF terminated in 52 patients (87%), directly to sinus rhythm in 7 or via the ablation of 1\u20136 intermediate atrial tachycardias (total 87) in 45 patients. This conversion was preceded by prolongation of fibrillatory cycle length by 39 \u00b1 9 msec, with the greatest magnitude occurring during ablation at the anterior LA, coronary sinus and PV\u2010LA junction. Thirty\u2010eight atrial tachycardias were focal (originating dominantly from these same sites), while 49 were macroreentrant (involving the mitral or cavotricuspid isthmus or LA roof). Patients without AF termination displayed shorter fibrillatory cycles at baseline: 130 \u00b1 14 vs 156 \u00b1 23 msec; P = 0.002.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Conclusion:<\/jats:italic>\n                    Termination of persistent AF can be achieved in 87% of patients by catheter ablation. Ablation of the structures annexed to the left atrium\u2014the left atrial appendage, coronary sinus, and PVs\u2014have the greatest impact on the prolongation of AF cycle length, the conversion of AF to atrial tachycardia, and the termination of focal atrial tachycardias.\n                  <\/jats:p>","DOI":"10.1111\/j.1540-8167.2005.00307.x","type":"journal-article","created":{"date-parts":[[2005,9,28]],"date-time":"2005-09-28T11:35:15Z","timestamp":1127907315000},"page":"1125-1137","source":"Crossref","is-referenced-by-count":571,"title":["Catheter Ablation of Long\u2010Lasting Persistent Atrial Fibrillation: Critical Structures for 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