Volume 11, Issue 1, Pages (January 2014)

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Volume 11, Issue 1, Pages 53-57 (January 2014) Prevalence and spectrum of electroencephalogram-identified epileptiform activity among patients with long QT syndrome Jason H. Anderson, MD, J. Martijn Bos, MD, PhD, Gregory D. Cascino, MD, Michael J. Ackerman, MD, PhD Heart Rhythm Volume 11, Issue 1, Pages 53-57 (January 2014) DOI: 10.1016/j.hrthm.2013.10.010 Copyright © 2014 Heart Rhythm Society Terms and Conditions

Figure 1 Flowchart for study inclusion. Each box represents inclusion with a perpendicular arrow associated with excluded charts. LQTS subtype is documented for each individual at each step. LQTS = long QT syndrome. Heart Rhythm 2014 11, 53-57DOI: (10.1016/j.hrthm.2013.10.010) Copyright © 2014 Heart Rhythm Society Terms and Conditions

Figure 2 Genotype and prevalence of abnormal EEG studies in patients with LQTS. Number of patients for each genotypic classification having a seizure phenotype (gray bar) and EEG documented epilepsy (blue bar). Unknown category represents patients with phenotypic LQTS without positive genotyping. Other category includes all patients with genotype-positive LQTS not represented by the previous categories. *Significance value of patients with LQT2 and epilepsy compared to epilepsy among patients with LQT1. **Significance value of patients with LQT2 and seizure phenotype compared to seizure phenotype among all other LQT subtypes. EEG = electroencephalogram; LQT1 = type 1 long QT syndrome; LQT2 = type 2 long QT syndrome; LQTS = long QT syndrome. Heart Rhythm 2014 11, 53-57DOI: (10.1016/j.hrthm.2013.10.010) Copyright © 2014 Heart Rhythm Society Terms and Conditions