{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T04:04:22Z","timestamp":1792641862334,"version":"4.5.0"},"reference-count":44,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circ: Arrhythmia and Electrophysiology"],"published-print":{"date-parts":[[2018,6]]},"abstract":"<jats:sec>\n            <jats:title>Background:<\/jats:title>\n            <jats:p>Mechanisms for persistent atrial fibrillation (AF) are unclear. We hypothesized that putative AF drivers and disorganized zones may interact dynamically over short time scales. We studied this interaction over prolonged durations, focusing on regions where ablation terminates persistent AF using 2 mapping methods.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods:<\/jats:title>\n            <jats:p>We recruited 55 patients with persistent AF in whom ablation terminated AF prior to pulmonary vein isolation from a multicenter registry. AF was mapped globally using electrograms for 360\u00b145 cycles using (1) a published phase method and (2) a commercial activation\/phase method.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>RESULTS:<\/jats:title>\n            <jats:p>\n              Patients were 62.2\u00b19.7 years, 76% male. Sites of AF termination showed rotational\/focal patterns by methods 1 and 2 (51\/55 vs 55\/55;\n              <jats:italic>P<\/jats:italic>\n              =0.13) in spatially conserved regions, yet fluctuated over time. Time points with no AF driver showed competing drivers elsewhere or disordered waves. Organized regions were detected for 61.6\u00b123.9% and 70.6\u00b120.6% of 1 minute per method (\n              <jats:italic>P<\/jats:italic>\n              =nonsignificant), confirmed by automatic phase tracking (\n              <jats:italic>P<\/jats:italic>\n              &lt;0.05). To detect AF drivers with &gt;90% sensitivity, 8 to 32 s of AF recordings were required depending on driver definition.\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusions:<\/jats:title>\n            <jats:p>Sites at which persistent AF terminated by ablation show organized activation that fluctuate over time, because of collision from concurrent organized zones or fibrillatory waves, yet recur in conserved spatial regions. Results were similar by 2 mapping methods. This network of competing mechanisms should be reconciled with existing disorganized or driver mechanisms for AF, to improve clinical mapping and ablation of persistent AF.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Clinical Trial Registration:<\/jats:title>\n            <jats:p>\n              URL:\n              <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"http:\/\/www.clinicaltrials.gov\">http:\/\/www.clinicaltrials.gov<\/jats:ext-link>\n              . Unique identifier: NCT02997254.\n            <\/jats:p>\n          <\/jats:sec>","DOI":"10.1161\/circep.117.005846","type":"journal-article","created":{"date-parts":[[2018,6,8]],"date-time":"2018-06-08T09:15:11Z","timestamp":1528449311000},"update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":35,"title":["Interaction of Localized Drivers and Disorganized Activation in Persistent Atrial Fibrillation"],"prefix":"10.1161","volume":"11","author":[{"given":"Christopher A.B.","family":"Kowalewski","sequence":"first","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., S.M.N.)."},{"name":"Department of Cardiology, Friedrich-Alexander-Universit\u00e4t Erlangen-N\u00fcrnberg, Germany (C.A.B.K.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fatemah","family":"Shenasa","sequence":"additional","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., S.M.N.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miguel","family":"Rodrigo","sequence":"additional","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., S.M.N.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Clopton","sequence":"additional","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., S.M.N.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriela","family":"Meckler","sequence":"additional","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., S.M.N.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahmood I.","family":"Alhusseini","sequence":"additional","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., S.M.N.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark A.","family":"Swerdlow","sequence":"additional","affiliation":[{"name":"Department of Medicine, Stanford University, CA (C.A.B.K., F.S., M.R., P.C., G.M., M.I.A., M.A.S., V.J., J.A.B.Z., T.B., A.J.R., P.J.W., 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