Bradycardia Of The AV Node

Question 1

Which coronary artery supplies that AV node

Answer 1

LAD

Question 2

What are examples of functional and structural causes of AV node dysfunction

Answer 2

Functional: Autonomic, metabolic, endocrine, drug
Structural: Fibrosis, Aging, CAD, SCNSA gene mutations Autoimmune diseases, Lyme, Chagas, Syphilis

Question 3

Symptoms of an AV block

Answer 3

Fatigue, syncope, death

Question 4

What does an 1st, second, and 3rd degree AVB look like on an EKG?

Answer 4

1: PR >200ms
2: Intermittent failure of an electrical impulse
3: complete failure of conduction
Wide QRS suggests delay in distal conduction system
Narrow QRS suggests delay in AV node to bundle of HIS

Question 5

AV Bradycardia treatment plan

Answer 5

Discontinue BB and CCB
Correct electrolytes
Temp pacing
perm pacing
Atropine vs isoproteronol