Effects on QTc, TpTe, and arrhythmia abated by 10 weeks post-exposure, when PEPs increased expression of LV Kv7.1, and RV Kv1.5 (IKur current) and Kv4.2 (Ito current) by roughly 50%, and significantly altered the balance of Kv1.5 expression between LV and RV, which may increase repolarization heterogeneity and arrhythmia susceptibility. This evidence concerns the gene KCNA5 and cardiac arrhythmia.