{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,2]],"date-time":"2023-10-02T12:38:18Z","timestamp":1696250298931},"reference-count":28,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2016,10,4]],"date-time":"2016-10-04T00:00:00Z","timestamp":1475539200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2016,11]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>There are limited adult data suggesting the tachycardia cycle length (TCL) of atrioventricular reentry tachycardia (AVRT) is shorter than atrioventricular nodal reentry tachycardia (AVNRT), though little data exist in children. We sought to determine if there is a difference in TCL between AVRT and AVNRT in children.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A single\u2010center retrospective review of children with supraventricular tachycardia (SVT) from 2000 to 2015 was performed. Inclusion criteria: Age \u2264 18 years, invasive electrophysiology study (EPS) confirming AVRT or AVNRT. Exclusion criteria: Atypical AVNRT, congenital heart disease, antiarrhythmic medication use at time of EPS. Data were compared between patients with AVRT and AVNRT via <jats:italic>t<\/jats:italic>\u2010test, \u03c7<jats:sup>2<\/jats:sup> test, and linear regression.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 835 patients were included (12 \u00b1 4 years, 52 \u00b1 31 kg, TCL 321 \u00b1 55 ms), 539 (65%) with AVRT (270 Wolff\u2010Parkinson\u2010White, 269 concealed pathways) and 296 (35%) with AVNRT. Patients with AVRT were younger (11.7 \u00b1 4.1 years vs 13.0 \u00b1 3.6 years, P &lt; 0.001) and smaller (49 \u00b1 22 kg vs 57 \u00b1 43 kg, P &lt; 0.001). In the baseline state, the TCL was shorter in AVRT than AVRNT (329 \u00b1 51 ms vs 340 \u00b1 60 ms, P = 0.04). In patients requiring isoproterenol to induce SVT, there was no difference in TCL (290 \u00b1 49 ms vs 297 \u00b1 49 ms, P = 0.26). When controlling for age, there was no difference in TCL between AVRT and AVNRT at baseline or on isoproterenol. The regression equation for TCL in the baseline state was TCL = 290 + 4 (age), indicating the TCL will increase by 4 ms above a baseline of 290 ms for each year of life.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>When controlling for age, there is no difference in the TCL between AVRT and AVNRT in children. Age, not tachycardia mechanism, is the most significant factor in predicting TCL.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pace.12950","type":"journal-article","created":{"date-parts":[[2016,9,22]],"date-time":"2016-09-22T10:26:39Z","timestamp":1474539999000},"page":"1206-1212","source":"Crossref","is-referenced-by-count":6,"title":["Is There a Difference in Tachycardia Cycle Length during SVT in Children with AVRT and AVNRT?"],"prefix":"10.1111","volume":"39","author":[{"given":"MARCOS F.","family":"MILLS","sequence":"first","affiliation":[{"name":"Department of Pediatrics, Residency Training Program, Lucile Packard Children's Hospital Stanford University  Palo Alto California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"KARA S.","family":"MOTONAGA","sequence":"additional","affiliation":[{"name":"Division of Pediatric Cardiology, Pediatric Electrophysiology, Department of Pediatrics, Lucile Packard Children's Hospital Stanford University  Palo Alto 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