11b. pacing

Question 1

why use pacemaker

Answer 1

Bradycardias:

• High grade 2nd degree AV block
• Complete (3rd degree) AV block
• Sick sinus syndrome
• Persistent atrial standstill
• Vasovagal syncope

Question 2

pacing leads do what

Answer 2

• conduct electrical impules to myocardium
• sense native electrical signals

Question 3

pacemaker nomenclature

Answer 3

Question 4

unipolar or bipolar better and why

Answer 4

bipolar: + and - closer together less interfernece

unipolar farther distance between = larger signal= can cause muscle twitching in skeltal muscle

Question 5

when to do epicardial pacing

Answer 5

• Smaller body size (cats and ferrets)
• Pre-existing infection
• Increased risk of thrombotic complications
• Another surgical condition