Key Learning Points
Action Potential
Depolarization Wave on the MonitorPage 4
- The amount of electrical signal(a) produced by the depolarization wave in a cardiac cell is very small.
- The monitor amplifies the small electrical signal(b) so that it can be displayed on the monitor screen.
ECG Shape, Up and Down Page 5
- When a depolarization wave is traveling toward a positive electrode, a positive wave is produced(a).
- When a depolarization wave is traveling toward a negative electrode, a negative wave is produced(b).
