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. 2019 Feb 25;3(1):ytz006. doi: 10.1093/ehjcr/ytz006

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© The Author(s) 2019. Published by Oxford University Press on behalf of the European Society of Cardiology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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(A) Electroanatomic activation map during the ventricular tachycardia. Counterclockwise activation on the inferolateral aspect of the right ventricle can be seen. (B) QRS alternans on the 12-lead electrocardiogram during entrainment pacing. Concealed entrainment was obtained by pacing from a low-voltage area in the anterior right ventricle (pink tag: arrowhead). The same QRS alternans as the ventricular tachycardia was reproduced by the pacing (red and blue brackets). AP, anterior-posterior; INF, inferior; LAT, local activation time; TV, tricuspid valve.