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. 2019 May;16(5):781–790. doi: 10.1016/j.hrthm.2018.10.040

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© 2018 The Authors

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

PMC Copyright notice

Inferolateral J-wave syndrome due to early repolarization. Top middle maps show bipolar electrogram voltage without evidence of low-voltage area. Bottom middle maps shows the latest activated regions (blue) in the inferobasal and laterobasal right ventricle. Right: There are no late depolarization electrograms coincident to the J wave but slow early repolarization potentials (arrows), which are present in the apical region (white-dotted area). Note that the J wave is small on lead II (right) and underestimates the extent of early repolarization recorded by epicardial mapping. Left: A 6 lead- ECG in a 15 year-old girl with recurrent VF. ECG = electrocardiogram.