IBHRE STUDY GUIDE QUESTIONS AND
ANSWERS LATEST 2025-2026 EXAM UPDATE|
GRADE A+ GUARANTEE
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 - 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 - 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 - 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:
a) 2X threshold
b) 4X threshold
c) 6X threshold
d) 8X threshold - Answer-D. 8x Threshold
Factors which might increase the time until activation of the EBU
(emergency back-up) or stat set and which would be avoided when
utilizing temporary programming 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 - Answer-D. All of the above
,Pacing thresholds are not influenced by:
a) electrode material
b) electrode surface area
c) insulation material
d) maturation process - Answer-C. Insulation Material
A lead fracture may result in:
a) decreased battery longevity
b) decreased conductor impedance values
c) decreased electrode impedance values
d) decreased current drain - Answer-D. Decreased Current Drain
Lead insulation failure characteristics commonly include:
a) large impedance values
b) small current drain
c) extracardiac stimulation
d) perforation - Answer-C. Extracardiac Stimulation
What is the voltage measurement of a pacing system with a resistance
of 800 ohms, current of 4.5 miliamps and pacing rate of 60 ppm?
, a) 0.36 V
b) 3.6 V
c) 5.6 V
d) 0.56 V - Answer-B. 3.6 V
Which of the following conditions has been shown to cause: an increase
in stimulation threshold, a wide QRS, latency, or undersensing?
a) hypokalemia
b) hyperkalemia
c) hypercalcemia
d) hypocalcemia - Answer-B. Hyperkalemia
What is the estimated battery service life of a pacemaker with a 1.6
Amp-hour battery and a 16 microamp current drain?
a) 5.6 years
b) 8.5 years
c) 10.0 years
d) 11.4 years - Answer-D. 11.4 years
ANSWERS LATEST 2025-2026 EXAM UPDATE|
GRADE A+ GUARANTEE
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 - 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 - 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 - 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:
a) 2X threshold
b) 4X threshold
c) 6X threshold
d) 8X threshold - Answer-D. 8x Threshold
Factors which might increase the time until activation of the EBU
(emergency back-up) or stat set and which would be avoided when
utilizing temporary programming 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 - Answer-D. All of the above
,Pacing thresholds are not influenced by:
a) electrode material
b) electrode surface area
c) insulation material
d) maturation process - Answer-C. Insulation Material
A lead fracture may result in:
a) decreased battery longevity
b) decreased conductor impedance values
c) decreased electrode impedance values
d) decreased current drain - Answer-D. Decreased Current Drain
Lead insulation failure characteristics commonly include:
a) large impedance values
b) small current drain
c) extracardiac stimulation
d) perforation - Answer-C. Extracardiac Stimulation
What is the voltage measurement of a pacing system with a resistance
of 800 ohms, current of 4.5 miliamps and pacing rate of 60 ppm?
, a) 0.36 V
b) 3.6 V
c) 5.6 V
d) 0.56 V - Answer-B. 3.6 V
Which of the following conditions has been shown to cause: an increase
in stimulation threshold, a wide QRS, latency, or undersensing?
a) hypokalemia
b) hyperkalemia
c) hypercalcemia
d) hypocalcemia - Answer-B. Hyperkalemia
What is the estimated battery service life of a pacemaker with a 1.6
Amp-hour battery and a 16 microamp current drain?
a) 5.6 years
b) 8.5 years
c) 10.0 years
d) 11.4 years - Answer-D. 11.4 years
