IBHRE Exam Questions
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1. A function of pacemaker circuitry that allows the B. Charge Dump
pacemaker output pulse to be dissipated quickly
maximizing both the output and sensing capabilities.
a) circuit resistors
b) charge dump
c) pulse neutralizer
d) current consumption
2. AV sequentially paced patients with frequent ven- A. Short Blanking
tricular ectopy should have the following pacemaker Period
parameters programmed to decrease the chance of
competition:
a) short blanking period
b) slower base rate
c) increased ventricular refractory period
d) none of the above
3. Low threshold electrode materials include each of the B. Elgiloy
following EXCEPT:
a) iridium oxide
b) elgiloy
c) platinized platinum
d) titanium nitride
4. The strength duration curve resulting in a parabolic B. I x V x t
shape is described by which of the following formu-
las?
a) I x t
b) I x V x t
c) I x R
d) all of the above
5. The ventriculoatrial conduction time of a pacemaker D. None of the
patient with a typical endless-loop-tachycardia may above
be calculated by which equation?
, IBHRE Exam Questions
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a) (upper rate limit interval) - ( AV delay + PVARP)
b) (upper rate limit interval) - ( AV delay + PVARP +
Wenckebach interval
c) (lower rate limit interval) - ( upper rate limit interval)
d) none of the above
6. Which of the following programmings would not pre- B. "Safety Pacing"
vent crosstalk?
a) a prolonged blanking period
b) "safety pacing"
c) low atrial output
d) less sensitive ventricular sensitivity
7. The most commonly used battery chemistry in ICDs C. Lithium Silver
is: Vanadium Oxide
a) lithium thionyl chloride
b) lithium manganese dioxide
c) lithium silver vanadium oxide
d) lithium manganese dioxide
8. The purpose of a capacitor in an electrical circuit is B. Store Electrical
to: Charge
a) convert AC to DC current
b) store electrical charge
c) rapidly switch battery voltage on or off
d) limit current flow to a single direction
9. A programming mode that would NOT be utilized to C. VDD
manage intermittent atrial fibrillation in a patient with
a DDD pacemaker is:.
a) DDI
b) DVI
c) VDD
d) VVI
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10. Variations in stimulus morphology on the surface D. All of the above
ECG of an analog recorder may be caused by:
a) a dislodged electrode
b) an electrical short
c) changes in patient position
d) all of the above
11. All of the following have been used as ERI magnet C. Gradual In-
responses except: crease In Rate
a) abrupt increase in rate
b) abrupt decrease in rate
c) gradual increase in rate
d) gradual decrease in rate
12. Which of the following has not been used as an indi- C. Programmed
cator of battery depletion? Amplitude Rever-
sion
a) pulse width stretching
b) mode change
c) programmed amplitude reversion
d) telemetered battery impedance
13. The electrical circuit that converts a signal with both B. Rectifier
positive and negative components into a signal with
only one component?
a) resistor
b) rectifier
c) diode
d) capacitor
14. Which of the following would account for the most D. Atrial Lead
common cause of inappropriate mode switching? Sensing Ventricu-
lar Signals
a) ventricular lead sensing atrial signals
b) lead insulation break
c) oversensing EMI
d) atrial lead sensing ventricular signals
, IBHRE Exam Questions
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15. A patient's stimulation threshold was 1.0 Volt & 0.4 D. 8x Threshold
msec pulse duration. The pacemaker is programmed
to 2.0 Volt & 0.8 msec duration. Lead impedance mea-
sures 1000 Ohms. The output energy for this patient
would be:
a) 2X threshold
b) 4X threshold
c) 6X threshold
d) 8X threshold
16. Factors which might increase the time until activation D. All of the above
of the EBU (emergency back-up) or stat set and which
would be avoided when utilizing temporary program-
ming include:
a) breaking of the telemetry link
b) reinitialization of the EBU or stat set
c) having to locate the EBU actuation mechanism
d) all of the above
17. Pacing thresholds are not influenced by: C. Insulation Mate-
rial
a) electrode material
b) electrode surface area
c) insulation material
d) maturation process
18. A lead fracture may result in: D. Decreased Cur-
rent Drain
a) decreased battery longevity
b) decreased conductor impedance values
c) decreased electrode impedance values
d) decreased current drain
19. Lead insulation failure characteristics commonly in- C. Extracardiac
clude: Stimulation
a) large impedance values
Study online at https://quizlet.com/_f88rbp
1. A function of pacemaker circuitry that allows the B. Charge Dump
pacemaker output pulse to be dissipated quickly
maximizing both the output and sensing capabilities.
a) circuit resistors
b) charge dump
c) pulse neutralizer
d) current consumption
2. AV sequentially paced patients with frequent ven- A. Short Blanking
tricular ectopy should have the following pacemaker Period
parameters programmed to decrease the chance of
competition:
a) short blanking period
b) slower base rate
c) increased ventricular refractory period
d) none of the above
3. Low threshold electrode materials include each of the B. Elgiloy
following EXCEPT:
a) iridium oxide
b) elgiloy
c) platinized platinum
d) titanium nitride
4. The strength duration curve resulting in a parabolic B. I x V x t
shape is described by which of the following formu-
las?
a) I x t
b) I x V x t
c) I x R
d) all of the above
5. The ventriculoatrial conduction time of a pacemaker D. None of the
patient with a typical endless-loop-tachycardia may above
be calculated by which equation?
, IBHRE Exam Questions
Study online at https://quizlet.com/_f88rbp
a) (upper rate limit interval) - ( AV delay + PVARP)
b) (upper rate limit interval) - ( AV delay + PVARP +
Wenckebach interval
c) (lower rate limit interval) - ( upper rate limit interval)
d) none of the above
6. Which of the following programmings would not pre- B. "Safety Pacing"
vent crosstalk?
a) a prolonged blanking period
b) "safety pacing"
c) low atrial output
d) less sensitive ventricular sensitivity
7. The most commonly used battery chemistry in ICDs C. Lithium Silver
is: Vanadium Oxide
a) lithium thionyl chloride
b) lithium manganese dioxide
c) lithium silver vanadium oxide
d) lithium manganese dioxide
8. The purpose of a capacitor in an electrical circuit is B. Store Electrical
to: Charge
a) convert AC to DC current
b) store electrical charge
c) rapidly switch battery voltage on or off
d) limit current flow to a single direction
9. A programming mode that would NOT be utilized to C. VDD
manage intermittent atrial fibrillation in a patient with
a DDD pacemaker is:.
a) DDI
b) DVI
c) VDD
d) VVI
, IBHRE Exam Questions
Study online at https://quizlet.com/_f88rbp
10. Variations in stimulus morphology on the surface D. All of the above
ECG of an analog recorder may be caused by:
a) a dislodged electrode
b) an electrical short
c) changes in patient position
d) all of the above
11. All of the following have been used as ERI magnet C. Gradual In-
responses except: crease In Rate
a) abrupt increase in rate
b) abrupt decrease in rate
c) gradual increase in rate
d) gradual decrease in rate
12. Which of the following has not been used as an indi- C. Programmed
cator of battery depletion? Amplitude Rever-
sion
a) pulse width stretching
b) mode change
c) programmed amplitude reversion
d) telemetered battery impedance
13. The electrical circuit that converts a signal with both B. Rectifier
positive and negative components into a signal with
only one component?
a) resistor
b) rectifier
c) diode
d) capacitor
14. Which of the following would account for the most D. Atrial Lead
common cause of inappropriate mode switching? Sensing Ventricu-
lar Signals
a) ventricular lead sensing atrial signals
b) lead insulation break
c) oversensing EMI
d) atrial lead sensing ventricular signals
, IBHRE Exam Questions
Study online at https://quizlet.com/_f88rbp
15. A patient's stimulation threshold was 1.0 Volt & 0.4 D. 8x Threshold
msec pulse duration. The pacemaker is programmed
to 2.0 Volt & 0.8 msec duration. Lead impedance mea-
sures 1000 Ohms. The output energy for this patient
would be:
a) 2X threshold
b) 4X threshold
c) 6X threshold
d) 8X threshold
16. Factors which might increase the time until activation D. All of the above
of the EBU (emergency back-up) or stat set and which
would be avoided when utilizing temporary program-
ming include:
a) breaking of the telemetry link
b) reinitialization of the EBU or stat set
c) having to locate the EBU actuation mechanism
d) all of the above
17. Pacing thresholds are not influenced by: C. Insulation Mate-
rial
a) electrode material
b) electrode surface area
c) insulation material
d) maturation process
18. A lead fracture may result in: D. Decreased Cur-
rent Drain
a) decreased battery longevity
b) decreased conductor impedance values
c) decreased electrode impedance values
d) decreased current drain
19. Lead insulation failure characteristics commonly in- C. Extracardiac
clude: Stimulation
a) large impedance values
