AV blocks

Question 1

First degree AV block

Answer 1

• PR > 20 sec - Fixed rhythm - Delayed impulse though AV node

Question 2

Second degree AV block- Type 1 (Wenkebach)

Answer 2

• PR > 20 sec - Gradual prolongation of PR until QRS complex is dropped - AV node conduction block

Question 3

Third degree AV block

Answer 3

• P waves & QRS regular but not in sync - Independent beats - Complete heart block

Question 4

Answer 4

First degree AV block

Question 5

Answer 5

Second degree AV block

Wenchebach

Question 6

Answer 6

Third degree AV block