{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,27]],"date-time":"2026-04-27T16:49:53Z","timestamp":1777308593175,"version":"3.51.4"},"reference-count":34,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2019,11,10]],"date-time":"2019-11-10T00:00:00Z","timestamp":1573344000000},"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":["Noninvasive Electrocardiol"],"published-print":{"date-parts":[[2020,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>The duration of ventricular repolarization (VR) and its spatial and temporal heterogeneity are central elements in arrhythmogenesis. We studied the adaptation of VR duration and dispersion and their relationship in healthy human subjects during atrial pacing.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Patients 20\u201050 years of age who were scheduled for ablation of supraventricular tachycardia without preexcitation but otherwise healthy were eligible. Vectorcardiography recordings with Frank leads were used for data collection. Incremental atrial pacing from a coronary sinus electrode was performed by decrements of 10ms\/cycle from just above sinus rate, and then kept at a fixed heart rate (HR) just below the Wenckebach rate for \u22655min and then stopped. VR duration was measured as QT and VR dispersion as T area, T amplitude and ventricular gradient. The primary measure (T90 End) was the time to reach 90% change from baseline to the steady state value during and after pacing.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A complete study protocol was accomplished in 9 individuals (6 women). VR duration displayed a monophasic adaptation during HR acceleration lasting on average 20s. The median (Q1\u2010Q3) T90 End for QT was 85s (51\u2010104), a delay by a factor &gt;4. All dispersion measures displayed a tri\u2010phasic response pattern during HR acceleration and T90 End was 3\u20105 times shorter than for VR duration.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Even during close to \u201cphysiological\u201d conditions, complex and differing response patterns in VR duration and dispersion measures followed changes in HR. Extended knowledge about these responses in disease conditions might assist in risk evaluation and finding therapeutic alternatives.<\/jats:p><\/jats:sec>","DOI":"10.1111\/anec.12713","type":"journal-article","created":{"date-parts":[[2019,11,10]],"date-time":"2019-11-10T08:18:25Z","timestamp":1573373905000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Adaptation of ventricular repolarization duration and dispersion during changes in heart rate induced by atrial stimulation"],"prefix":"10.1111","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3230-532X","authenticated-orcid":false,"given":"Karl\u2010Jonas","family":"Axelsson","sequence":"first","affiliation":[{"name":"Department of Molecular and Clinical Medicine Institute of Medicine Sahlgrenska Academy University of Gothenburg Gothenburg Sweden"},{"name":"Department of Cardiology Region V\u00e4stra G\u00f6taland Sahlgrenska University Hospital 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