Bradyarrythmias

Question 1

Cells in the AV node have a relatively higher membrane potential.

Answer 1

True

Question 2

Cells in the AV node exhibit spontaneous depolarization during phase 4 of the action potential.

Answer 2

True

Question 3

Cells in the AV node have slower phase 0 depolarization.

Answer 3

True

Question 4

Permanent pacing is the only reliable therapy for symptoms arising from AV conduction block.

Answer 4

True

Question 5

Components of AV conduction axis.

Answer 5

atria
ventricles
AV node

Question 6

The time from the most rapid deflection of the atrial electrogram in the His bundle recording to the His electrogram

Answer 6

AH interval

Question 7

conduction through the AV node

Answer 7

AH interval

Question 8

Normal AH interval

Answer 8

<130ms

Question 9

The time from His electrogram to the earliest onset of QRS

Answer 9

HV interval

Question 10

Normal HV interval

Answer 10

<55ms

Question 11

Prolonged AH interval

Answer 11

type 1 second degree AV block

Question 12

Indications for pacemaker in chronic bifascicular and trifascicular block:

Answer 12

intermittent 3rd degree AV block
type 2 second degree AV block
alternating bundle branch block