First Degree AV Block

Question 1

What is the rhythm of a First Degree AV Block?

Answer 1

Regular

Question 2

What is the rate of a First Degree AV Block?

Answer 2

1. That of the underlying sinus rhythm
2. Atrial and ventricular rates will be the same

Question 3

What are the P-wave characteristics of a First Degree AV Block?

Answer 3

1. Sinus
   *one P wave to each QRS

Question 4

What is the PR duration of a First Degree AV Block?

Answer 4

Prolonged
*>0.20 seconds remains consistent throughout the rhythm strip

Question 5

What is the QRS duration of a First Degree AV Block?

Answer 5

Normal
*0.12 seconds or less