Programming/Detection

Question 1

What are the nominals for the VT/VF zone?

Answer 1

VF nominally On, 18/24, 188 bpm/ 320 ms and VT zone is nominally Off, 16, 167 bpm

Question 2

If an interval falls on the line at the bottom of a detection zone, which zone will it be in?

Answer 2

The zone to the right or the slower zone

Question 3

What should TDI be programmed to?

Answer 3

Patient’s know VT cycle length with a 40 ms buffer

Question 4

What types of intervals are considered noise?

Answer 4

< 120 ms

Question 5

In what patients would you use 12/16 detection for VF? What are the cons for doing this?

Answer 5

In patients with rapid onset of symptoms. Could have a problem with inappropriate therapy with such lenient intervals.

Question 6

In what patients would you use 30/40 NID?

Answer 6

In primary prevention patients, per PREPARE.

Question 7

What is combined count?

Answer 7

Non-programmable, automatic feature for events in both VT and VF zone. When episode occurs in two zones, once VF counter reaches 6, NID is lengthened to 7/6 of the current interval and once NID is met the device looks at the last 8 intervals to determine which therapy to deliver.

Question 8

How does combined count determine which therapy to deliver once NID is met?

Answer 8

If all events are TS, VT therapy is delivered. If one event is FS, VF therapy is delivered.

Question 9

When is it appropriate to program a via VT zone?

Answer 9

When a patient has two distinctly different VTs

Question 10

If an ICD is emitting a high urgency tone, what conditions may be present?

Answer 10

RV Lead Issue, Out of Range Impedance, Low Battery, VF Off, Excessive Charge Time EOS