CRM HV Final Review

If the Threshold Start is programmed to 50% and the maximum measured R-wave is 9mV, at what sensitivity values will the algorithm start its decay?

3 mV

During Post Shock Pacing, when does the Post Shock Pacing Mode begin?

After Return to Sinus is met

T or F: Abbott Medical's default RV polarity for the first phase of a biphasic shock is negative (like the pacing cathode), which has been shown to be more effective than RV positive in the termination of VF.

False

T or F: Assurity DR devices offer fixed atrial sensitivity only, SenseAbility is not available for the atrium.

False

T or F: If the ventricular morphology scores a high percent match on Far Field MD, then the complex is most likely VT.

False

T or F: The Far Field MD discriminator in Abbott ICDs collects a new template from a single R-wave complex every 3 hours.

False

If the SVT 'Diagnosis Criteria: is programmed to IF ANY then the following is true:

IF ANY of the discriminators indicates VT therapy will be delivered

Placing a magnet on an Abbott ICD programmed to the nominal Magnet Response setting will:

Inhibit tachy detection

Which study looked at patients with a prior MI and low EF, did not require a + EP study and showed a 31% reduction in all cause mortality in the ICD group?

MADITT II

When do Post Shock Pacing Output and Rate begin?

Once the Post Shock Pause has ended

If a device is programmed to deliver a 65% fixed tilt shock, the _____ of each phase of the biphasic waveform will vary based on system impedance.

Pulse width

Which heart failure study showed that ICD's reduced the risk of all-cause mortality by a significant 23% when compared to Amiodarone or placebo in patients with NYHA Class II or IIII and LVEF = 35%?

SCD-HeFT

In order for the device to continue to give VF therapy for a rhythm that re-detects a rate in the VT-1 zone, the Post VT/VF Detection Rate/Interval must be programmed to:

Same as VT-1

The Interval Average is calculated by?

The Current Interval plus the three previous intervals divided by 4

What is the definition of decay delay?

The amount of time that the sensitivity level of the device remains at the threshold state value before beginning its decay

Reprogramming the Stability Delta from 40ms (nominal) to 100ms will cause the ICD:

To be more likely to label an episode as a VT and give therapy

T or F: A change in antiarrhythmic drug therapy such as amiodarone could result in a change in DFT.

True

T or F: ALL Abbott Medical ICD's and CRT-Ds rectify sensed signals and measure the signal amplitude from baseline to peak.

True

T or F: Abbott ICDs can be programmed to ignore the application of a magnet.

True

T or F: Abbott Medical offers the Fortify ICD and Unify CRT-D devices which feature 40J delivered/45J stored output.

True

T or F: Abbott defibrillators must confirm 6 VF/VT intervals during charging and will only deliver the HV shock on a VF/VT interval (synchronized).

True

T or F: Ramp decreases the intervals between pulses within the burst of ATP.

True

T or F: Scanning is defined as an interval shortening between bursts or trains.

True

T or F: Tilt refers to the percentage of current delivered during each phase of a biphasic shock.

True

What type of rhythm are we trying to induce when we shock on T?

VF

Evaluate the EGM. What is the patient's rhythm AFTER the shock is delivered?

VT

This timer starts after a VT diagnosis is made and ATP therapy begins

VT Therapy Time Out

When does the SVT Discriminator Timeout start

When an SVT diagnosis is made

When does the SVT discrimination Timeout start in a Fortify Assura Device?

When an SVT diagnosis is made

When does episodal pacing begin?

When the 3rd VT or VF interval is binned

Increasing the delta value for Sudden Onset will:

decrease the likelihood of diagnosing the rhythm as VT

A patient requires surgery that will involve the use of bovie. What is the recommended programming for the patients ICD for the duration of the procedure?

disable the device detection and therapies using the enable disable button on the merlin programmer

T or F: Inreasing the delta value for AV Association will make the device more likely to diagnose the rhythm as VT

false

T or F: Abbott Medical offers the Fortify ICD and Unity CRT-D devices, which feature 40J delivered/ 45 J stored output for defibrillation.

true

Which of the following set of parameters are programmable options for overcoming t-wave oversensing?

-Threshold Start -Decay Delay -Max Sensitivity -Low Frequency Attenuation Filter on

The lowest Maximum Sensitivity value that you can program in a Fortify ICD with the Low Frequency Attenuation Filter turned OFF is:

0.2 mV

The lowest Maximum Sensitivity values that you can program in a Fortify ICD with the Low Frequency Attenuation Filter turned OFF is:

0.2 mV