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实验发现北五味子对离体及在体蛙心有β受体阻滞剂的作用，使单相动作电位（ＭＡＰ）频率减慢、幅度减少、平台期缩短并下移，心肌收缩力减弱，其作用强于β受体阻滞剂心得安。
The experiment found that schisandra had a beta-blocker effect on isolated and in vivo frog hearts, which reduced the frequency of single-phase action potential (MAP), reduced the amplitude, shortened the plateau phase, and moved down, and decreased myocardial contractility. The effect is stronger than the beta blocker propranolol.