Objective To investigate Chaihu Sanshen capsule on myocardial ischemic arrhythmia mice HERG K^+ channel protein expression in ischemic arrhythmia rat models, and provide more experimental basis for clinical use of Chaihu Sanshen capsule. Methods The rats were randomly divided into blank group, sham-operation group, model group, Chaihu Sanshen (Qinghao) group, Chaihu Sanshen (Changshan) group, Wenxin granule group, amiodarone group, 10 rats in each group. The drug group was given pretreatment for 10 days before 10 days of left anterior desc...