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Flashcards in Bradyarrythmias Deck (12):
1

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

True

2

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

True

3

Cells in the AV node have slower phase 0 depolarization.

True

4

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

True

5

Components of AV conduction axis.

atria
ventricles
AV node

6

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

AH interval

7

conduction through the AV node

AH interval

8

Normal AH interval

<130ms

9

The time from His electrogram to the earliest onset of QRS

HV interval

10

Normal HV interval

<55ms

11

Prolonged AH interval

type 1 second degree AV block

12

Indications for pacemaker in chronic bifascicular and trifascicular block:

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