The PR interval begins at the first sign of the P wave and ends at the first sign of the next deflection, which is called the:
A) T wave.
B) S wave.
C) PR segment.
D) QRS complex.
Question 2
The short period of electrical inactivity between the end of the P wave and the start of the QRS complex is called the:
A) P pause.
B) PR segment.
C) PR interval.
D) PR pause.