IBHRE EXAM

IBHRE EXAM, PRACTICE EXAM AND STUDYGUIDE NEWES
m m m m m m


T 2025 ACTUAL EXAM COMPLETE 400 QUESTIONS AND CO
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RRECT DETAILED ANSWERS (VERIFIED ANSWERS)
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|ALREADY GRADED A+ m m




A function of pacemaker circuitry that allows the pacemaker output puls
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e to be dissipated quickly maximizing both the output and sensingcapabi
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lities.

a) circuit resistors m


b) charge dump m


c) pulse neutralizer m


d) current consumption - ANSWER B. Charge Dump
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AV sequentially paced patients with frequent ventricular ectopy should
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have the following pacemaker parameters programmed to decrease the
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chance of competition:
m m




a) short blanking period m m


b) slower base rate m m


c) increased ventricular refractory period m m m


d) none of the above - ANSWER A. Short Blanking Period
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Low threshold electrode materials include each of the following
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EXCEPT:

a) iridium oxide m


b) elgiloy
c) platinized platinum m


d) titanium nitride - ANSWER B. Elgiloy m m m m m




The strength duration curve resulting in a parabolic shape is described
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by which of the following formulas?
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,a) I x t m m


b) I x V x t
m m m m


c) I x R m m


d) all of the above - ANSWER B. I x V x t
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The ventriculoatrial conduction time of a pacemaker patient with a typic
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al endless-loop-tachycardia may be calculated by which equation?
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a) (upper rate limit interval) - ( AV delay + PVARP)
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b) (upper rate limit interval) - m m m m


m( AV delay + PVARP + Wenckebachinterval
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c) (lower rate limit interval) - ( upper rate limit interval)
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d) none of the above - ANSWER D. None of the above
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Which of the following programmings would not prevent crosstalk?
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a) a prolonged blanking period
m m m


b) "safety pacing" m


c) low atrial output m m


d) less sensitive ventricular sensitivity -
m m m m




m ANSWER B. "Safety Pacing"The most commonly used battery chem
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istry in ICDs is:
m m m




a) lithium thionyl chloride m m


b) lithium manganese dioxide m m


c) lithium silver vanadium oxide m m m


d) lithium manganese dioxide - m m m


mANSWER C. Lithium Silver VanadiumOxide m m m m m




The purpose of a capacitor in an electrical circuit is to:
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a) convert AC to DC current m m m m


b) store electrical charge
m m


c) rapidly switch battery voltage on or off
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,d) limit current flow to a single direction -
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ANSWER B. Store ElectricalCharge
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A programming mode that would NOT be utilized to manage interm
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ittent atrial fibrillation in a patient with a DDD pacemaker is:.
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a) DDI
b) DVI
c) VDD
d) VVI - ANSWER C. VDD m m m m




Variations in stimulus morphology on the surface ECG of an analogreco
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rder may be caused by:
m m m m




a) a dislodged electrode
m m


b) an electrical short
m m


c) changes in patient position m m m


d) all of the above - ANSWER D. All of the above
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All of the following have been used as ERI magnet responses except:
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a) abrupt increase in rate m m m


b) abrupt decrease in rate m m m


c) gradual increase in rate m m m


d) gradual decrease in rate - ANSWER C. Gradual Increase In Rate
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Which of the following has not been used as an indicator of battery
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depletion?

a) pulse width stretching m m


b) mode change m


c) programmed amplitude reversion m m


d) telemetered battery impedance - m m m


mANSWER C. ProgrammedAmplitude Reversion m m m m

, The electrical circuit that converts a signal with both positive and
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negative components into a signal with only one component?
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a) resistor
b) rectifier
c) diode
d) capacitor - ANSWER B. Rectifier m m m m




Which of the following would account for the most common cause of
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inappropriate mode switching? m m




a) ventricular lead sensing atrial signals m m m m


b) lead insulation breakm m


c) oversensing EMI m


d) atrial lead sensing ventricular signals -
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mANSWER D. Atrial LeadSensing Ventricular Signals
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A patient's stimulation threshold was 1.0 Volt & 0.4 msec pulse duratio
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n. The pacemaker is programmed to 2.0 Volt & 0.8 msec duration. Lead
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mimpedance measures 1000 Ohms. The output energy forthis patient wou
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ld be: m




a) 2X threshold m


b) 4X threshold m


c) 6X threshold m


d) 8X threshold - ANSWER D. 8x Threshold
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Factors which might increase the time until activation of the EBU
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(emergency back- m


up) or stat set and which would be avoided whenutilizing temporar
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y programming include:
m m




a) breaking of the telemetry link m m m m


b) reinitialization of the EBU or stat set m m m m m m


c) having to locate the EBU actuation mechanism
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d) all of the above - ANSWER D. All of the above
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