Pace-Maker Mediated Tachycardia (PMT)

Question 1

What are the 2 conditions that must exist for pace-maker mediated tachycardia (PMT) to occur?

Answer 1

• pts must have ability to conduct impulses from ventricles to the atria (appx 60-70% have this)
• atrium is repolarized and ready to be depolarized

Question 2

What are the most common causes of pace-maker mediated tachycardia (PMT)?

Answer 2

Anything that causes AV dissociation such as:
- PVC
- Atrial non-capture
- atrial undersensing
- atrial oversensing

Question 3

Which timing interval is meant to prevent pace-maker media tachycardia (PMT)?

Answer 3

PVARP
- retrograde P-wave fall within PVARP and are labeled as AR, which are not tracked

Question 4

Which algorithm is designed to prevent pace-maker mediated tachycardia (PMT)?

Answer 4

PVC Response

Question 5

What criteria is needed for a PMT to identified?

Answer 5

8 consecutive AS-VP cycles that began with a VP and has a VP-AS cycle length < 400ms

Question 6

What action does the PMT intervention algorithm take when a PMT is detected?

Answer 6

• extends PVARP to 400ms

Question 7

How long is the PMT Intervention feature off following an intervention?

Answer 7

90 secs