1 for specific request mail
IBHRE Practice Test Questions and Correct Answers
| Latest Update
What current ICD capacitor technologies provide the highest energy
density and does not require reformation?
Ans: Tantalum Electrolytic
1.67 Hz would equal how many bpm?
Ans: 100 bpm
Assignment Expert
1 bpm = 0.0166667 Hz
Which pace/sense lead designs would one expect the highest current
Guru01 - Stuvia
density w/ a bipolar impedance reading of 1100 ohms?
Ans: Brady lead w/ anode of 4.2 mm2 and cathode 5.2 mm2
2026
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?
©
Ans: 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?
Ans: Hyperkalemia (high potassium)
, 2 for specific request mail
What is the estimated battery longevity of a pacemaker with 1.0 amp-
hour battery and 20 microamp drain ?
Ans: 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?
Assignment Expert
Ans: Slew rate
Guru01 - Stuvia
The isovolumetric time from electrical depolarization of the heart to
mechanical systole describes what term?
Ans: Pre-ejection interval
2026
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?
Ans: Micro volt t-wave alternans
Which battery chemistry is now incorporated into pacemakers?
Ans: 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?
Ans: Micro volt t-wave alternans
Fluoroquinolones, a new gen antibiotic is known for which cardiac effect?
Ans: Prolonging QT
What would decrease stim thresholds and current drain?
IBHRE Practice Test Questions and Correct Answers
| Latest Update
What current ICD capacitor technologies provide the highest energy
density and does not require reformation?
Ans: Tantalum Electrolytic
1.67 Hz would equal how many bpm?
Ans: 100 bpm
Assignment Expert
1 bpm = 0.0166667 Hz
Which pace/sense lead designs would one expect the highest current
Guru01 - Stuvia
density w/ a bipolar impedance reading of 1100 ohms?
Ans: Brady lead w/ anode of 4.2 mm2 and cathode 5.2 mm2
2026
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?
©
Ans: 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?
Ans: Hyperkalemia (high potassium)
, 2 for specific request mail
What is the estimated battery longevity of a pacemaker with 1.0 amp-
hour battery and 20 microamp drain ?
Ans: 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?
Assignment Expert
Ans: Slew rate
Guru01 - Stuvia
The isovolumetric time from electrical depolarization of the heart to
mechanical systole describes what term?
Ans: Pre-ejection interval
2026
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?
Ans: Micro volt t-wave alternans
Which battery chemistry is now incorporated into pacemakers?
Ans: 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?
Ans: Micro volt t-wave alternans
Fluoroquinolones, a new gen antibiotic is known for which cardiac effect?
Ans: Prolonging QT
What would decrease stim thresholds and current drain?
