KCNA3 and atrial fibrillation: We have previously reported that acacetin isolated from the traditional Chinese medicinal herb snow lotus possesses unique effects of preferentially inhibiting atrial potassium channels including IKur (ultra‐rapidly activating delayed rectifier potassium current), IK.ACh (acetylcholine‐activated potassium current), Ito (transient outward potassium current) and SKCa current (small conductance Ca2+‐activated potassium current), which contribute to its selective anti‐atrial fibrillation properties.11, 15, 20