week 2 quiz

Question 1

The brief pause between the P wave and QRS complex represents:
Select one:
a. depolarization of the inferior part of the atria.
b. the period of time when the atria are repolarizing.
c. full dispersal of electricity throughout both atria.
d. a momentary conduction delay at the AV node.

Answer 1

d. a momentary conduction delay in the AV node.

Question 2

The P wave represents:
Select one:
a. SA nodal discharge.
b. atrial depolarization. 
c. a delay at the AV node.
d. contraction of the atria.

Answer 2

b. atrial depolarization.

Question 3

The PR interval should be no shorter than \_\_\_\_ seconds and no longer than \_\_\_\_ seconds in duration.
Select one:
a. 0.12, 0.20 
b. 0.14, 0.30
c. 0.16, 0.40
d. 0.18, 2.0

Answer 3

a. 0.12, 0.20

Question 4

The normal P wave duration is less than \_\_\_ milliseconds and the amplitude is less than \_\_\_ millimeters tall.
Select one:
a. 110; 2.5 
b. 120; 3.0
c. 130; 3.5
d. 140; 4.0

Answer 4

a. 110; 2.5

Question 5

A prolonged PR interval:
Select one:
a. is greater than 120 milliseconds.
b. indicates that the AV node was bypassed.
c. indicates an abnormal delay at the AV node.
d. is a sign of rapid atrial depolarization.

Answer 5

c. indicates an abnormal delay at the AV node.