Recording the ECG

Question 1

5 Stages of Ventricular Depolarization

Answer 1

1. septal depolarization
2. ventricular depolarization (greatest amplitude)
3. left depolarization, slower than right
4. left base depolarization
5. no potential difference, heart completely depolarized

Question 2

what is out shadowed by ventricular depolarization (QRS)

Answer 2

atrial depolarization