{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T21:18:43Z","timestamp":1778879923829,"version":"3.51.4"},"reference-count":41,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2014,1,30]],"date-time":"2014-01-30T00:00:00Z","timestamp":1391040000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"The Swiss National Fund for Scientific Research","award":["325200-112668"],"award-info":[{"award-number":["325200-112668"]}]},{"name":"The Swiss National Fund for Scientific Research","award":["320030-127229"],"award-info":[{"award-number":["320030-127229"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2014,4]]},"abstract":"<jats:title>Repolarization Alternans and Atrial Remodeling<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Paroxysmal atrial fibrillation (AF) may be triggered by intermittent atrial tachycardia, and ultimately lead to persistent AF. However, the mechanisms by which intermittent atrial tachycardia promotes sustained AF are not well understood.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods and Results<\/jats:title><jats:p>Eight sheep were chronically implanted with 2 pacemakers for the recording of broadband right atrial unipolar electrograms, and for the delivery of electrophysiological stimulation protocols and intermittent right atrial tachycardia. Right atrial kinetics of activation recovery interval (ARI) as a surrogate for action potential duration, of conduction time and velocity, and of repolarization alternans were analyzed at incremental pacing rates during the remodeling process induced by weeks of intermittent atrial tachycardia until the development of sustained AF.<\/jats:p><jats:p>Intermittent atrial tachycardia decreased ARI and blunted its rate adaptation, facilitated atrial capture, and slowed conduction at high rates, and increased susceptibility to pacing\u2010induced AF. In spite of blunted ARI rate adaptation, right atrial repolarization alternans was maintained during remodeling, and further increased in magnitude just before rapid pacing\u2010induced AF.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study suggests that weeks of intermittent right atrial tachycardia result in a gradual electrical remodeling favorable for wavebreaks and reentry that may facilitate fibrillation.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jce.12353","type":"journal-article","created":{"date-parts":[[2014,1,2]],"date-time":"2014-01-02T16:32:41Z","timestamp":1388680361000},"page":"418-427","source":"Crossref","is-referenced-by-count":21,"title":["Intermittent Atrial Tachycardia Promotes Repolarization Alternans and Conduction Slowing During Rapid Rates, and Increases Susceptibility to Atrial Fibrillation in a Free\u2010Behaving Sheep Model"],"prefix":"10.1111","volume":"25","author":[{"given":"JOANNA","family":"MONIGATTI\u2010TENKORANG","sequence":"first","affiliation":[{"name":"Department of Cardiology Lausanne University Hospital  Lausanne Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"FLORIAN","family":"JOUSSET","sequence":"additional","affiliation":[{"name":"Applied Signal Processing Group Swiss Federal Institute of Technology  Lausanne Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"PATRIZIO","family":"PASCALE","sequence":"additional","affiliation":[{"name":"Department of Cardiology Lausanne University Hospital  Lausanne Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"JEAN\u2010MARC","family":"VESIN","sequence":"additional","affiliation":[{"name":"Applied Signal Processing Group Swiss Federal Institute of Technology  Lausanne 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