Abstract Inhibitory effects of lemakalim (Lem), pinacidil (Pin),acetylcholine (Ach) , T1~+, and K~+ on early afterdepolarization (EAD) of mouse atrial fibers were observed.

• 实验观察了lemakalim（Lem）、pinacidil（Pin）、乙酰胆碱（Ach）、TI＋及高K＋对小鼠心房肌早发后去极化（EAD，由低K＋引起）的抑制作用。