240 The Bradyarrhythmias: Disorders of the Atrioventricular Node

Question 1

The only reliable therapy for symptoms arising from AV conduction block (H20 C240 P1727)

Answer 1

Permanent pacing

Question 2

Idiopathic progressive fibrosis of the conduction system typically begins at what age (H20 C240 P1728)

Answer 2

4th decade of life

Question 3

Congenital AV block in the setting of a structurally normal heart is seen in: (H20 C240 P1728)

Answer 3

Children born to mothers with SLE

Question 4

Normal AH interval on electrophysiologic study (H20 C240 P1729)

Answer 4

<130 ms

Question 5

Third degree or high grade AV block with escape rates of ___ while awake is a class I indication for pacemaker implantation (H20 C240 P1730)

Answer 5

<40 beats/min

Question 6

Atrial fibrillation with bradycardia and pauses exceeding this duration is a class I indication for pacemaker implantation (H20 C240 P1730)

Answer 6

> 5 s

Question 7

Class of recommendation for pacemaker implantation in patients with asymptomatic third degree AV block

Answer 7

Class IIa

Question 8

Markedly prolonged HV interval exceeding this duration is a class IIa indication for pacemaker implantation in asymptomatic patients in chronic bifascicular and trifascicular block (H20 C240 P1730)

Answer 8

> 100 ms

Question 9

This pacing mode is associated with decreased rates of chronic atrial fibrillation and stroke (H20 C240 P1732)

Answer 9

Physiologic pacing

Question 10

Leadless miniaturized pacing systems may be appropriate in these patients (H20 C240 P1732)

Answer 10

Atrial fibrillation and AV conduction block