Cardio - AV block (heart block)

Question 1

What is it?

Answer 1

impaired electrical conduction between the atria and ventricles

Question 2

What are the three types?

Answer 2

First degree heart block

Second degree heart block

Third degree (complete) heart block

Question 3

Definition of first degree heart block

Answer 3

• PR interval > 0.2 seconds
• asymptomatic first-degree heart block is relatively common and does not need treatment

Question 4

What are the two different types of Second-degree heart block

Answer 4

Two different types:

Mobitz type 1

Mobitz type 2

Question 5

What is Second degree, Mobitz type 1 heart block?

Answer 5

• Type one (Mobitz I, Wenckebach): progressive prolon(e)gation of the PR interval until a dropped beat occurs

Question 6

What is Second degree, Mobitz type 2 heart block?

Answer 6

• type 2 (Mobitz II): PR interval is constant but the P wave is often not followed by a QRS complex

Question 7

What is third-degree (complete) heart block?

Answer 7

There is no association between the P waves and QRS complexes