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Sudden QRS morphology change during ventricular pacing in a scar-related isthmus What is the mechanism?

Abstract : We present an example of sudden modification in QRS morphology during ventricular pacing inside a scar-related isthmus. This is explained by a "concealed" sudden block in both the orthodromic and antidromic wavefront directions, allowing then the activation to proceed through a now overt antidromic conduction.
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https://hal.univ-lorraine.fr/hal-03208823
Contributor : Christian de Chillou <>
Submitted on : Monday, April 26, 2021 - 7:23:15 PM
Last modification on : Tuesday, April 27, 2021 - 9:18:52 AM

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Philippe Maury, Anne Rollin, Jean-Marc Sellal, Alexandre Duparc, Pierre Mondoly, et al.. Sudden QRS morphology change during ventricular pacing in a scar-related isthmus What is the mechanism?. Journal of Electrocardiology, Elsevier, 2016, 49 (6), pp.973-976. ⟨10.1016/j.jelectrocard.2016.07.035⟩. ⟨hal-03208823⟩

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