IBHRE ACTUAL EXAM PAPER 2026
COMPLETE QUESTIONS WITH SOLUTIONS
GRADED A+
◉ 1.67 Hz would equal how many bpm?
Answer: 100 bpm
1 bpm = 0.0166667 Hz
◉ Which pace/sense lead designs would one expect the highest
current density w/ a bipolar impedance reading of 1100 ohms?
Answer: Brady lead w/ anode of 4.2 mm2 and cathode 5.2 mm2
◉ What is the voltage measurement of a pacing system w/
impedance of 500 ohms, current of 5.0 milliamp and pulse width of
0.4 ms and rate of 60 bpm?
Answer: V = 2.5 V
V=I x R
= 5.0 milliamps x 500 ohms
= 2,500 millivolts
=2,500/1000
,◉ What condition is shown to have an increase stimulation
threshold, wide QRS, latency, or under sensing?
Answer: Hyperkalemia (high potassium)
◉ What is the estimated battery longevity of a pacemaker with 1.0
amp-hour battery and 20 microamp drain ?
Answer: Longevity = 114 x (amp-hours/microamp drain)
= 114 x (1.0/20)
= 5.7 years
◉ Which sensing related parameter represents the maximal rate of
change of the electrical potential between the sensing electrode and
is the first derivative of the electrogram?
Answer: Slew rate
◉ The isovolumetric time from electrical depolarization of the heart
to mechanical systole describes what term?
Answer: Pre-ejection interval
◉ What test is typically performed during exercise with HR around
105-115 and was shown to have a negative predictive value in
MADIT II and SCD-HeFT?
Answer: Micro volt t-wave alternans
, ◉ Which battery chemistry is now incorporated into pacemakers?
Answer: Lithium silver vanadium & lithium carbon mono fluoride
◉ What test is performed over 10-20 beats following a PVC and
whose absence is a predictor of cardiac mortality following an MI?
Answer: Micro volt t-wave alternans
◉ Fluoroquinolones, a new gen antibiotic is known for which
cardiac effect?
Answer: Prolonging QT
◉ What would decrease stim thresholds and current drain?
Answer: Reducing electrode surface area
Ex: from 12mm to 8mm
◉ Match the units: watt-second
Answer: Power
◉ Defibrillation energies exceed pacing energies by a factor of ?
Answer: 1,000,000
COMPLETE QUESTIONS WITH SOLUTIONS
GRADED A+
◉ 1.67 Hz would equal how many bpm?
Answer: 100 bpm
1 bpm = 0.0166667 Hz
◉ Which pace/sense lead designs would one expect the highest
current density w/ a bipolar impedance reading of 1100 ohms?
Answer: Brady lead w/ anode of 4.2 mm2 and cathode 5.2 mm2
◉ What is the voltage measurement of a pacing system w/
impedance of 500 ohms, current of 5.0 milliamp and pulse width of
0.4 ms and rate of 60 bpm?
Answer: V = 2.5 V
V=I x R
= 5.0 milliamps x 500 ohms
= 2,500 millivolts
=2,500/1000
,◉ What condition is shown to have an increase stimulation
threshold, wide QRS, latency, or under sensing?
Answer: Hyperkalemia (high potassium)
◉ What is the estimated battery longevity of a pacemaker with 1.0
amp-hour battery and 20 microamp drain ?
Answer: Longevity = 114 x (amp-hours/microamp drain)
= 114 x (1.0/20)
= 5.7 years
◉ Which sensing related parameter represents the maximal rate of
change of the electrical potential between the sensing electrode and
is the first derivative of the electrogram?
Answer: Slew rate
◉ The isovolumetric time from electrical depolarization of the heart
to mechanical systole describes what term?
Answer: Pre-ejection interval
◉ What test is typically performed during exercise with HR around
105-115 and was shown to have a negative predictive value in
MADIT II and SCD-HeFT?
Answer: Micro volt t-wave alternans
, ◉ Which battery chemistry is now incorporated into pacemakers?
Answer: Lithium silver vanadium & lithium carbon mono fluoride
◉ What test is performed over 10-20 beats following a PVC and
whose absence is a predictor of cardiac mortality following an MI?
Answer: Micro volt t-wave alternans
◉ Fluoroquinolones, a new gen antibiotic is known for which
cardiac effect?
Answer: Prolonging QT
◉ What would decrease stim thresholds and current drain?
Answer: Reducing electrode surface area
Ex: from 12mm to 8mm
◉ Match the units: watt-second
Answer: Power
◉ Defibrillation energies exceed pacing energies by a factor of ?
Answer: 1,000,000
