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. 2016 Aug 31;33(3):242–244. doi: 10.1016/j.joa.2016.06.004

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© 2016 Japanese Heart Rhythm Society. Published by Elsevier B.V.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 2. — Top: Tachycardia response after entrainment from the right ventricular apex: “VAHV” response, PPI-TLC interval 40 ms, and SA-VA interval 20 ms (CSp=proximal coronary sinus, CSos=coronary sinus ostium, His_p=proximal His-bundle, His_d=distal His-bundle, RVa=right ventricular apex, PPI=post-pacing interval, TCL=tachycardia cycle length. Intervals in ms). Bottom: A ventricular extrastimuli delivered when the His-bundle is refractory delays the next atrial activation with the same activation sequence (CSp=proximal coronary sinus, CSos=coronary sinus ostium, His_p=proximal His-bundle, His_d=distal His-bundle, RVa=right ventricular apex. Intervals in ms).