Wenkebach window - ANSWER Max tracing interval(in ms) - TARP(in ms)
2:1 Block Point - ANSWER 60,000/TARP
Basic unit of capacitance - ANSWER Farad
Function of pacemaker circuitry that allows the pacemaker output pulse to be dissipated quickly maximizing both output and sensing capabilities ...
IBHRE practice exam #1 2024 LATEST
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Wenkebach window - ANSWER Max tracing interval(in ms) - TARP(in ms)
2:1 Block Point - ANSWER 60,000/TARP
Basic unit of capacitance - ANSWER Farad
Function of pacemaker circuitry that allows the pacemaker output pulse to be dissipated quickly
maximizing both output and sensing capabilities - ANSWER Charge dump
Av sequentially paced pts with frequent ventricular ectopy should have what programmed to decrease
chance of competition - ANSWER Short blanking period
The electrical circuit that coverts a signal with both positive and negative components into a signal with
only one component - ANSWER Rectifier
Threshold 1.0@0.4. Output 2.0@0.8. Output = how many times the threshold - ANSWER 8x
Lead insulation failure characteristics commonly include - ANSWER Extracardiac stimulation
What is the voltage measurement of a pacing system with a resistance of 800 ohms, current of 4.5 mA
and pacing rate of 60 ppm? - ANSWER 3.6 V
Which of the following conditions has been shown to cause: increase in stimulation threshold, wide QRS,
latency, or undersensing? - ANSWER Hyperkalemia
What is the estimated battery service life of a pacemaker with a 1.6 amp hour battery and a 16 micro
amp current drain? - ANSWER 11.4 yrs
A 75 y/o male with CHB and old anterior MI has a DDDC pacemaker with the following settings: LRL 60,
URL 100, AVD 200ms, Atrial refractory 350ms, vref 300ms, pacemaker Wenckebach interval is: - ANSWER
50 ms
75 y/o male with CHB and old anterior MI has a DDDC pacemaker with the following settings: LRL 60,
URL 100, AVD 200, ARP 350ms, vref 300. What will the apparent max AVD be prior to the 2:1 block point
be? - ANSWER 250ms
The term virtual electrode describes: - ANSWER The lead electrode and the surrounding myocardium
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