The potassium causes cessation of electrical and mechanical cardiacactivity by blocking the initial phase of myocardial depolarization.
钾通过阻断心肌除极的起始相，导致电机械活动的停止。
3
Conclusion The sequential therapy with methotrexate and mifepristone is an effective and safe method for the treatment to ectopic pregnancy with fetal cardiacactivity.