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Background and PurposeAtrial fibrillation (AF) is the most common cardiac arrhythmia and is associated with an increased risk for stroke, heart failure and cardiovascular‐related mortality. Candidate targets for anti‐AF drugs include a potassium channel Kv1.5, and the ionic currents IKACh and late INa, along with increased oxidative stress and activation of NFAT‐mediated gene transcription. As pharmacological...