This video will help you deal with cardiac action potential and its phases. Since it is quite an important topic to grasp on, this video will help you get the basic concepts. Timeline 0:00 Introduction 0:11 Cardiomyocytes 1:24 Cardiomyocyte cycle relation cardiac cycle 3:10 Exchange of ions in cardiomyocytes 5:18 Depolarization 8:07 plateau phase 9:48 Repolarization 10:58 Stage names and numbering