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. 2020 Aug;17(8):1262–1270. doi: 10.1016/j.hrthm.2020.03.021

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© 2020 The Authors

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

PMC Copyright notice

Control case with fast endocardial conduction and physiological transmural action potential duration gradient. A, B: High repolarization gradients (HRGs) within 1 cm around the scar (blue) for endocardial (A) and epicardial (B) pacing. Endocardial lead locations are shown by red circles and epicardial lead locations by black circles. Regions of interest are highlighted by yellow circles.C: HRG volume for endocardial (red) and epicardial (black) pacing at 0.2–3.5 cm from a scar. Dashed lines indicate a significant difference (P <.05).