Pacemakers

Question 1

Name 3 indications for a pacemaker

Answer 1

• Symptomatic bradycardias
• Mobitz Type 2 AV block
• Third degree heart block
• Severe heart failure
• Hypertrophic obstructive cardiomyopathy

Question 2

1) When would a single chamber pacemaker be placed in the right atrium?
2) When would a single chamber pacemaker be placed in the right ventricle?

Answer 2

1) AV conduction is normal - problem is with SA node
2) Abnormal AV conduction

Question 3

Where are the leads in a dual chamber pacemaker?

Answer 3

RA + RV

Question 4

1) Where are the leads in a triple chamber pacemaker?
2) What are these kinds of pacemakers often called?
3) What condition are these pacemakers often used in?

Answer 4

1) RA, RV, LV
2) Cardiac resynchronisation therapy (CRT) pacemakers
3) Heart failure