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38 Cards in this Set
- Front
- Back
List 5 induction methods
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Vfib inudction
Shock on T 50Hz burst pacing Manual burst pacing PES induction |
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Generally what does Vfib induction do
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Uses RV shocking coil to stimulate heart at very fast rates
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What two options are there in Vfib induction
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Fib Low: Delivers wave form at 9 volts @ 1.1 ms
Fib High: Delivers wave form at 15 volts @ 1.1 ms |
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What mode must device be in for shock on T induction
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Monitor + Therapy
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Nominal shock on T energy
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1.1 J
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True or False
You hold the induction button for shock on T |
False:
Programmed pacing pulses and shock on T will occur after induction button pressed. |
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True of False
You can divert during shock on T pacing impulses |
True
Divert button will stop induction |
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How are shock on T pacing pulses delivered in Cognis
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BiV with 0ms LV offset
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True or False
Vfib induction is effective at inducing Vtach? |
False
It IS effective at inducing Ventricular Fibrillation |
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What tachy mode must the device be in for Vfib induction
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Monitor + Therapy
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How fast and at what strength are Vfib pulse delivered ( Fib High and Fib Low)
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20Hz or 50ms
High is 15V @ 1.1ms Low is 9V @ 1.1ms |
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True of False
Vfib induction is delivered through the RV pace/sense electrodes |
False: Impulses are delivered through the RV shock electrodes
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How long is Vfib impulses delivered after induction button is pressed?
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Button must be held. Induction is delivered as long as button is held and will stop 0.5 seconds after button is released.
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What shock configuration will pulses be delivered during Vfib induction
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Current programmed shock lead configuration
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Name two main differences between 50Hz burst and Vfib induction
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1 - 50Hz burst uses pace/sense pacing electrodes not shocking electrodes
2. Fib H/L are 20 Hz (50ms) vs. 50Hz or 20ms cycle length |
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Will Fib High/Low ever self terminate?
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Yes, After 15 sec of continuous delivery
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Explain Afib association with Vfib induction
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Atrial Fib may occasionally been seen with this induction, but is usually self terminating of converted after ventricular shock
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Name a common unpleasant side effect of the Vfib induction method
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Dramatic muscle contractions
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Name two arrhythmias PES is commonly used to induce
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monomorphic VT and atrial fib
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True of False - PES is delivered in the ventricle only
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False:
PES can be delivered in the atruim or ventricle |
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What mode must the device be in for PES
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monitor + therapy
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True of False
Press and hold the PES induce button to deliver PES |
False: press and release and will delivered programmed number of pacing pulses for S1 pacing train
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True of false - PES is not recorded in therapy history
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True
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How is PES delivered in Cognis
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BiV with 0ms LV offset regardless of permanent programming value
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Three things PES is used for
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1- induce Monomorphic VT
2- induce Afib 3-pace terminate arrhythmias |
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How does burst pacing differ in Cognis between PES and manual burst pacing
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PES delivers pacing BV with 0 ms LV offset. Manual Burst pacing delivers RV only
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How many bursts during delivery until manual burst pace starts to decrement
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first 8 pulses are delivered at decrement interval
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How many ms is 50Hz
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20ms
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Name 5 ways to terminate manual burst
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1-release burst button
2-loss of telemetry 3-Pressing Divert button 4-Initiating a STAT shock 5-Initiating PES,Commanded ATP, or Commanded Shock |
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50Hz Burst
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Special feature in manual burst pacing allowing pulses to be delivered at 20ms fixed cycle length
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What mode are Manual and 50hz bursts delivered in - and it what chambers
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AOO or VOO
In Congnis, manual and 50Hz bursts are delivered RV only |
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Reasons to Use EP Test Commanded Shock
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To treat patient any time a max output shock is not indicated
--Cardiovert Afib --Treat VT below rate --1.1 J Shock to test lead |
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How to induce an arrhythmias using commanded shock
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--run 50ms paper speed during NSR
--Measure QRS from sensed marker to upslope of T-wave --Shock on this determined coupling interval to hit T-wave |
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How are all commanded shocks delivered
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Unless otherwise programmed, Delivered R-wave synchronized and committed.
--If no R wave are sensed after 2 seconds, shock is delivered asynch |
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How are commanded ATP delivered
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At programmed ATP amplitude and pulse width either AOO of VOO
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Is ATP delivered the same in Cognis as in Teligen
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No
ATP is delivered BV in Cognis |
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What mode must you be in for commanded ATP
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Monitor only - This can be as a temp mode from the commanded EP teset screen
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How do you initiate 1 burst of ATP from commanded ATP screen
A second burst? |
Press start ventricular ATP to initiate 1 burst
Press continue to initiate 2nd or subsequent bursts of ATP |