IBHRE EXAM NEWEST 2026/2027 ACTUAL EXAM COMPLETE 425
QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
A function of pacemaker circuitry that allows the 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 - Correct answer-B. Charge Dump
AV sequentially paced patients with frequent ventricular ectopy should have the following pacemaker
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 - Correct answer-A. Short Blanking Period
Low threshold electrode materials include each of the following EXCEPT:
a) iridium oxide
b) elgiloy
c) platinized platinum
d) titanium nitride - Correct answer-B. Elgiloy
,The strength duration curve resulting in a parabolic shape is described by which of the following
formulas?
a) I x t
b) I x V x t
c) I x R
d) all of the above - Correct answer-B. I x V x t
The ventriculoatrial conduction time of a pacemaker patient with a typical endless-loop-tachycardia may
be calculated by which equation?
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 - Correct answer-D. None of the above
Which of the following programmings would not prevent crosstalk?
a) a prolonged blanking period
b) "safety pacing"
c) low atrial output
d) less sensitive ventricular sensitivity - Correct answer-B. "Safety Pacing"
The most commonly used battery chemistry in ICDs is:
a) lithium thionyl chloride
b) lithium manganese dioxide
,c) lithium silver vanadium oxide
d) lithium manganese dioxide - Correct answer-C. Lithium Silver Vanadium Oxide
The purpose of a capacitor in an electrical circuit is to:
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 - Correct answer-B. Store Electrical Charge
A programming mode that would NOT be utilized to manage intermittent atrial fibrillation in a patient
with a DDD pacemaker is:.
a) DDI
b) DVI
c) VDD
d) VVI - Correct answer-C. VDD
Variations in stimulus morphology on the surface 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 - Correct answer-D. All of the above
All of the following have been used as ERI magnet responses except:
a) abrupt increase in rate
, b) abrupt decrease in rate
c) gradual increase in rate
d) gradual decrease in rate - Correct answer-C. Gradual Increase In Rate
Which of the following has not been used as an indicator of battery depletion?
a) pulse width stretching
b) mode change
c) programmed amplitude reversion
d) telemetered battery impedance - Correct answer-C. Programmed Amplitude Reversion
The electrical circuit that converts a signal with both positive and negative components into a signal with
only one component?
a) resistor
b) rectifier
c) diode
d) capacitor - Correct answer-B. Rectifier
Which of the following would account for the most common cause of inappropriate mode switching?
a) ventricular lead sensing atrial signals
b) lead insulation break
c) oversensing EMI
d) atrial lead sensing ventricular signals - Correct answer-D. Atrial Lead Sensing Ventricular Signals
A patient's stimulation threshold was 1.0 Volt & 0.4 msec pulse duration. The pacemaker is programmed
to 2.0 Volt & 0.8 msec duration. Lead impedance measures 1000 Ohms. The output energy for this
patient would be:
QUESTIONS WITH DETAILED VERIFIED ANSWERS (100%
A function of pacemaker circuitry that allows the 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 - Correct answer-B. Charge Dump
AV sequentially paced patients with frequent ventricular ectopy should have the following pacemaker
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 - Correct answer-A. Short Blanking Period
Low threshold electrode materials include each of the following EXCEPT:
a) iridium oxide
b) elgiloy
c) platinized platinum
d) titanium nitride - Correct answer-B. Elgiloy
,The strength duration curve resulting in a parabolic shape is described by which of the following
formulas?
a) I x t
b) I x V x t
c) I x R
d) all of the above - Correct answer-B. I x V x t
The ventriculoatrial conduction time of a pacemaker patient with a typical endless-loop-tachycardia may
be calculated by which equation?
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 - Correct answer-D. None of the above
Which of the following programmings would not prevent crosstalk?
a) a prolonged blanking period
b) "safety pacing"
c) low atrial output
d) less sensitive ventricular sensitivity - Correct answer-B. "Safety Pacing"
The most commonly used battery chemistry in ICDs is:
a) lithium thionyl chloride
b) lithium manganese dioxide
,c) lithium silver vanadium oxide
d) lithium manganese dioxide - Correct answer-C. Lithium Silver Vanadium Oxide
The purpose of a capacitor in an electrical circuit is to:
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 - Correct answer-B. Store Electrical Charge
A programming mode that would NOT be utilized to manage intermittent atrial fibrillation in a patient
with a DDD pacemaker is:.
a) DDI
b) DVI
c) VDD
d) VVI - Correct answer-C. VDD
Variations in stimulus morphology on the surface 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 - Correct answer-D. All of the above
All of the following have been used as ERI magnet responses except:
a) abrupt increase in rate
, b) abrupt decrease in rate
c) gradual increase in rate
d) gradual decrease in rate - Correct answer-C. Gradual Increase In Rate
Which of the following has not been used as an indicator of battery depletion?
a) pulse width stretching
b) mode change
c) programmed amplitude reversion
d) telemetered battery impedance - Correct answer-C. Programmed Amplitude Reversion
The electrical circuit that converts a signal with both positive and negative components into a signal with
only one component?
a) resistor
b) rectifier
c) diode
d) capacitor - Correct answer-B. Rectifier
Which of the following would account for the most common cause of inappropriate mode switching?
a) ventricular lead sensing atrial signals
b) lead insulation break
c) oversensing EMI
d) atrial lead sensing ventricular signals - Correct answer-D. Atrial Lead Sensing Ventricular Signals
A patient's stimulation threshold was 1.0 Volt & 0.4 msec pulse duration. The pacemaker is programmed
to 2.0 Volt & 0.8 msec duration. Lead impedance measures 1000 Ohms. The output energy for this
patient would be:
