IBHRE EXAM QUESTIONS | TESTED AND PROVEN
ANSWERS | LATEST UPDATE 2024/2025 100%
(GRADE A+)
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
Ans>> 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
1
,d) none of the above
Ans>> 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
Ans>> 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
2
,d) all of the above
Ans>> 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
Ans>> 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
3
, d) less sensitive ventricular sensitivity
Ans>> 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
Ans>> 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
4
ANSWERS | LATEST UPDATE 2024/2025 100%
(GRADE A+)
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
Ans>> 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
1
,d) none of the above
Ans>> 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
Ans>> 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
2
,d) all of the above
Ans>> 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
Ans>> 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
3
, d) less sensitive ventricular sensitivity
Ans>> 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
Ans>> 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
4
