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Choi, Han, Zo, Kim, Kim, Sohn, Oh, Lee, Park, Choi, Seo, and Lee: The Value of Ventriculoatrial Intervals in Determining the Mechanism of PSVT and the Sites of Accessory Pathways
Original Article
Korean Circulation Journal

Korean Circulation Journal 1995; 25(2): 416-422.

Published online: 30 April 1995

DOI: https://doi.org/10.4070/kcj.1995.25.2.416

The Value of Ventriculoatrial Intervals in Determining the Mechanism of PSVT and the Sites of Accessory Pathways

Kee-Joon Choi, M.D., Kyoo-Rok Han, M.D., Joo-Hee Zo, M.D., Hyo-Soo Kim, M.D., Cheol-Ho Kim, M.D., Dae-Won Sohn, M.D., Byung-Hee Oh, M.D., Myoung-Mook Lee, M.D., Young-Bae Park, M.D., Yun-Shik Choi, M.D., Jung-Don Seo, M.D., Young-Woo Lee, M.D.

Copyright © 1995 The Korean Society of Circulation

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The ventriculoatrial(VA) intervals during supraventricular tachycardia(VAsvt) and during pacing with same cycle length as tachycardia(VApace) were analysed in 48 patients to evaluate the usefullness in determining the mechanism of paroxysmal supraventricular tachycardia(PSVT) and the sites of accessory pathways.
The results are as follows :
1)In differenciation AV nodal reentry from AV reentry mechanism, VAsvt(25.6±21.5 vs 148.0±27.7msec, p<0.01), VApace-VAsvt(135.3±15.7 vs 55.0±33.5msec,p<0.01), and VAsvt/VApace(0.15±0.10 vs 0.75±0.14,p<0.05) were useful. Cutoff values were 95msec in VAsvt, 110msec in VApace-VAsvt and 0.5 in VAsvt/VApace.
2) There were no overlaps in VA intervals between the AV nodal reentry group and the AV reentry group with posteroseptal accessory pathway.
3) In AV reentry tachycardia, VApace-VAsvt>50msec(sensitivity 81%,specificity 100%) and VAsvt/VAace<0.7(sensitivity 71%, specificity 100%) suggested the high probability of left free wall accessory pathway.
In Conclusion, VAsvt, VApace-VAsvt and VAsvt/VApace are useful parameters in determining the mechanism of PSVT and the sites of accessory pathways.

Keywords: PSVT, Accessory pathway, Ventriculoatrial interval

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