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Flashcards in DFT Deck (30)
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1
Q

Whats the safety margin for DFT

A

10J

2
Q

Two types of VF induction

A

Shock on T

High Frequency Burst

3
Q

Which two trials spoke against DFT testing

A

Nordic - First shock efficacy same

SIMPLE - Similar arrhythmic deaths

4
Q

What is a class IIa indication for DFT

A

Right sided implant

5
Q

3 ways to manage DFT

A

Change vectors

Implant equipment

Increase energy

6
Q

In biotronik is the Can ANODE or CATHODE

A

Anode

7
Q

Time based waveforms are more efficient than voltage based waveforms - TRUE or FALSE

A

True - hence biphasic 2 (2ms chop off in the end)

8
Q

During DFT testing - what is the detection?

A

Same as programmed detection 18/24 normal

9
Q

Deliver emergency shock is what type of shock?

A

Committed - asynchronous

10
Q

Under what circumstance is ATP OPT cleared and reset

A

Shock delivery or reprogramming

11
Q

Does ATP OPT apply to the VF zone?

A

No - Only VT zones

12
Q

What is the minimum ATP interval available

A

200ms

13
Q

What did PAINFREE show?

A

ATP terminates 3 out of 4 FVT painlessly

14
Q

What is the criterion for ATP ONESHOT

A

In the VF zone

Stability of +-12 must be met - not programmable

15
Q

Does ONESHOT occur pre or during charging

A

Pre

16
Q

Reconfirmation is how many of how many

A

3 of 4

17
Q

What does surge guard do?

A

Cuts off accelerating therapy mid-episode

18
Q

Does surge guard temp or perm program off pro arrhythmic therapy

A

Temporarily.

It’ll be back on for the next episode

19
Q

What did surge guard use to be called?

A

Therapy ratchet

20
Q

How much % of charge is delivered during both phase 1 and phase 2 of shock

A

Phase 1 = 60%

Phase 2 = 50% of whats left

21
Q

Whats the cut off voltage % of a biphasic shock

A

20%

22
Q

Does the ICD and SVC Coil share the same polarity?

A

Yes - both Anodal

23
Q

When is the polarity reversed during alternating shock sequence?

A

Polarity is reversed after the first FULL shock

24
Q

Is the shock following an abort committed or non committed?

A

Commited

25
Q

Whats the shock abortion criteria

A

12/16

26
Q

If committed the shock will delivery on next sync-able TACHY R-wave. If one comes, what will happen?

A

Will wait for 2s and then deliver regardless

27
Q

Shock confirmation takes place during DFT testing - TRUE / FALSE

A

FALSE

As many aborted shocks as you like

28
Q

What does Progressive course of therapy ensure

A

ATP will NEVER follow shocks in the same episode

Shock energy will NEVER DECREASE in an episode

29
Q

What must be programmed to prevent non-treatable VT

A

Shocks within the VT zone - never programme just ATP due to progressive course of therapy

30
Q

How long does post shock blanking last

A

1 second