RG and WG administration had no influence on the physiological structure and function of rats' myocardium, while it could induce arrhythmia and strengthen cardiac contractility, which could be associated with upregulated p‐CaMKII and PPARδ, downregulated SERCA2a and elevated intracellular [Ca2+]i. This evidence concerns the gene CAMK2G and cardiac arrhythmia.