1
IBHRE PRACTICE TEST QUESTIONS AND
CORRECT ANSWERS 2026 GET IT RIGHT !!!
What current ICD capacitor technologies provide the
highest energy density and does not require reformation?
-
-Solution -Tantalum Electrolytic
1.67 Hz would equal how many bpm? -
-Solution -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? -
-Solution -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? -
-Solution -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? -
-Solution -Hyperkalemia (high potassium)
, 2
What is the estimated battery longevity of a pacemaker
with 1.0 amp-hour battery and 20 microamp drain ? -
-Solution -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? -
-Solution -Slew rate
The isovolumetric time from electrical depolarization of
the heart to mechanical systole describes what term? -
-Solution -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? -
-Solution -Micro volt t-wave alternans
Which battery chemistry is now incorporated into
pacemakers? -
-Solution -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? -
IBHRE PRACTICE TEST QUESTIONS AND
CORRECT ANSWERS 2026 GET IT RIGHT !!!
What current ICD capacitor technologies provide the
highest energy density and does not require reformation?
-
-Solution -Tantalum Electrolytic
1.67 Hz would equal how many bpm? -
-Solution -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? -
-Solution -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? -
-Solution -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? -
-Solution -Hyperkalemia (high potassium)
, 2
What is the estimated battery longevity of a pacemaker
with 1.0 amp-hour battery and 20 microamp drain ? -
-Solution -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? -
-Solution -Slew rate
The isovolumetric time from electrical depolarization of
the heart to mechanical systole describes what term? -
-Solution -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? -
-Solution -Micro volt t-wave alternans
Which battery chemistry is now incorporated into
pacemakers? -
-Solution -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? -
