What is action potential of human heart??? Share with your friends Share 0 🔥disha 🔥 🔥garg🔥 answered this The Cardiac action potential 1 View Full Answer Diksha Sharma answered this The cardiac action potential is a brief change in voltage across the cell membrane of heart cells. This is caused by the movement of charged atoms between the inside and outside of the cell, through proteins called ion channels. Regards 0