IBHRE EXAM PRACTICE EXAM QUESTIONS
WITH CORRECT VERIFIED SOLUTONS NEW
MODIFIED TESTED AND APPROVED!!!
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 --CORRECT 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 --CORRECT 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
Page 1 of 141
,b) 8.5 years
c) 10.0 years
d) 11.4 years --CORRECT ANSWER--D. 11.4 years
A 75 year old male with complete heart block and an old anterior myocardial infarct has a
DDDC pacemaker with the following settings: (Questions 23-25)
Low rate - 60 ppm Upper rate - 100 ppm
AV delay - 200 msec Atrial refractory period - 350 msec
Ventricular refractory period - 300 msec
The pacemaker Wenckebach interval is:
a) 0 msec
b) 50 msec
c) 100 msec
d) 150 msec --CORRECT ANSWER--B. 50 ms
A 75 year old male with complete heart block and an old anterior myocardial infarct has a
DDDC pacemaker with the following settings: (Questions 23-25)
Low rate - 60 ppm Upper rate - 100 ppm
AV delay - 200 msec Atrial refractory period - 350 msec
Ventricular refractory period - 300 msec
The pacemaker for the above 75 year old patient will reach its 2:1 block point at what rate?
Page 2 of 141
,a) 100 ppm
b) 109 ppm
c) 119 ppm
d) 2:1 block should not occur --CORRECT ANSWER--B. 109 bpm
A 75 year old male with complete heart block and an old anterior myocardial infarct has a
DDDC pacemaker with the following settings: (Questions 23-25)
Low rate - 60 ppm Upper rate - 100 ppm
AV delay - 200 msec Atrial refractory period - 350 msec
Ventricular refractory period - 300 msec
What will the apparent maximal AV delay be prior to the 2:1 block point?
a) 200 ms
b) 250 ms
c) 300 ms
d) 350 ms --CORRECT ANSWER--B. 250 ms
The term virtual electrode describes:
a) a new porous tip electrode material
b) the lead electrode and the surrounding myocardium
c) the afterpotential from the output pulse
d) all of the above --CORRECT ANSWER--B. The Lead Electrode & The Surrounding
Myocardium
Page 3 of 141
, Which of the following acronym(s) describes an insulation material that has been utilized in
ICD leads?
a) CMOS
b) DBS/DFT
c) MCRD
d) PTFE --CORRECT ANSWER--D. PTFE
The difference in the physiologic AV delay between atrial paced beats and atrial sensed beats
is generally regarded as being between:
a) 12 and 20 milliseconds
b) 25 and 50 milliseconds
c) 60 and 100 milliseconds
d) 110 and 120 milliseconds --CORRECT ANSWER--B. 25 & 50 ms
Conditions required for reentry circuits would include:
a) unidirectional block of a pathway
b) differential conduction of the pathways
c) two pathways connected distally and proximally
d) all of the above --CORRECT ANSWER--D. All the above
What is meant by "intention to treat" analysis in a randomized control trial?
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WITH CORRECT VERIFIED SOLUTONS NEW
MODIFIED TESTED AND APPROVED!!!
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 --CORRECT 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 --CORRECT 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
Page 1 of 141
,b) 8.5 years
c) 10.0 years
d) 11.4 years --CORRECT ANSWER--D. 11.4 years
A 75 year old male with complete heart block and an old anterior myocardial infarct has a
DDDC pacemaker with the following settings: (Questions 23-25)
Low rate - 60 ppm Upper rate - 100 ppm
AV delay - 200 msec Atrial refractory period - 350 msec
Ventricular refractory period - 300 msec
The pacemaker Wenckebach interval is:
a) 0 msec
b) 50 msec
c) 100 msec
d) 150 msec --CORRECT ANSWER--B. 50 ms
A 75 year old male with complete heart block and an old anterior myocardial infarct has a
DDDC pacemaker with the following settings: (Questions 23-25)
Low rate - 60 ppm Upper rate - 100 ppm
AV delay - 200 msec Atrial refractory period - 350 msec
Ventricular refractory period - 300 msec
The pacemaker for the above 75 year old patient will reach its 2:1 block point at what rate?
Page 2 of 141
,a) 100 ppm
b) 109 ppm
c) 119 ppm
d) 2:1 block should not occur --CORRECT ANSWER--B. 109 bpm
A 75 year old male with complete heart block and an old anterior myocardial infarct has a
DDDC pacemaker with the following settings: (Questions 23-25)
Low rate - 60 ppm Upper rate - 100 ppm
AV delay - 200 msec Atrial refractory period - 350 msec
Ventricular refractory period - 300 msec
What will the apparent maximal AV delay be prior to the 2:1 block point?
a) 200 ms
b) 250 ms
c) 300 ms
d) 350 ms --CORRECT ANSWER--B. 250 ms
The term virtual electrode describes:
a) a new porous tip electrode material
b) the lead electrode and the surrounding myocardium
c) the afterpotential from the output pulse
d) all of the above --CORRECT ANSWER--B. The Lead Electrode & The Surrounding
Myocardium
Page 3 of 141
, Which of the following acronym(s) describes an insulation material that has been utilized in
ICD leads?
a) CMOS
b) DBS/DFT
c) MCRD
d) PTFE --CORRECT ANSWER--D. PTFE
The difference in the physiologic AV delay between atrial paced beats and atrial sensed beats
is generally regarded as being between:
a) 12 and 20 milliseconds
b) 25 and 50 milliseconds
c) 60 and 100 milliseconds
d) 110 and 120 milliseconds --CORRECT ANSWER--B. 25 & 50 ms
Conditions required for reentry circuits would include:
a) unidirectional block of a pathway
b) differential conduction of the pathways
c) two pathways connected distally and proximally
d) all of the above --CORRECT ANSWER--D. All the above
What is meant by "intention to treat" analysis in a randomized control trial?
Page 4 of 141
