{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T22:42:23Z","timestamp":1785883343835,"version":"3.56.0"},"reference-count":15,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2016,9,23]],"date-time":"2016-09-23T00:00:00Z","timestamp":1474588800000},"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":[[2016,10]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>Although a ventriculoatrial interval (VAI) of \u226470 ms is used to distinguish atrioventricular nodal reentrant tachycardia from orthodromic atrioventricular reciprocating tachycardia (AVRT), a VAI of \u226470 ms is sometimes observed in cases of AVRT. The study aimed to evaluate the short VAI that is seen in AVRT and to understand its underlying mechanism.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Electrophysiologic studies of 46 consecutive patients with AVRT involving an accessory pathway (AP) were examined retrospectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>AP was right sided in seven patients and left sided in 39. A VAI (interval from QRS onset to the earliest intracardiac atrial electrogram recorded by any mapping catheter during AVRT) \u226470 ms during AVRT (short VAI) was observed in eight patients: six with a left lateral AP and two with a left posteroseptal AP. During AVRT involving a left\u2010sided AP, the QRS\u2010V interval (from the earliest QRS onset to the local ventricular electrogram at a site which showed earliest atrial electrogram recorded from the coronary sinus catheter) was significantly shorter (37 \u00b1 7 ms vs 54 \u00b1 13 ms, P = 0.001) and supernormal conduction (QRS duration or the QRS\u2010V interval shortening by \u226510 ms during AVRT) was more frequently seen (63% vs 6%, P = 0.02) in the short VAI group than in the normal VAI group. Furthermore, these parameters were shown to be determinants for short VAI.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>A short VAI is sometimes observed during AVRT involving a left\u2010sided AP. The short VAI may be caused by rapid propagation or supernormal conduction between the proximal Purkinje\u2010muscle junction and basal left ventricular myocardium.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pace.12928","type":"journal-article","created":{"date-parts":[[2016,8,2]],"date-time":"2016-08-02T16:27:14Z","timestamp":1470155234000},"page":"1108-1115","source":"Crossref","is-referenced-by-count":12,"title":["Ventriculoatrial Intervals \u226470 ms in Orthodromic Atrioventricular Reciprocating Tachycardia"],"prefix":"10.1111","volume":"39","author":[{"given":"KOICHI","family":"NAGASHIMA","sequence":"first","affiliation":[{"name":"Division of Cardiology, Department of Medicine Nihon University School of Medicine  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ICHIRO","family":"WATANABE","sequence":"additional","affiliation":[{"name":"Division of Cardiology, Department of Medicine Nihon University School of Medicine  Tokyo 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