IBHRE Practice Test Questions and Verified Answers, 100% Guarantee Pass (Latest 2025) What current ICD capacitor technologies provide the highest energy density and does not require reformation? - Correct Answers ✅Tantalum Electrolytic 1.67 Hz would equal how many bpm? - Correct Answers ✅100 bpm
- bpm = 0.0166667 Hz
Which pace/sense lead designs would one expect the highest current density w/ a bipolar impedance reading of 1100 ohms? - Correct Answers ✅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? - Correct Answers ✅V
= 2.5 V
V=I x R = 5.0 milliamps x 500 ohms = 2,500 millivolts
=2,500/1000 1 / 2
IBHRE Practice Test Questions and Verified Answers, 100% Guarantee Pass (Latest 2025) What condition is shown to have an increase stimulation threshold, wide QRS, latency, or under sensing? - Correct Answers ✅Hyperkalemia (high potassium) What is the estimated battery longevity of a pacemaker with 1.0 amp-hour battery and 20 microamp drain ? - Correct Answers ✅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? - Correct Answers ✅Slew rate The isovolumetric time from electrical depolarization of the heart to mechanical systole describes what term? - Correct Answers ✅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? - Correct Answers ✅Micro volt t-wave alternans
- / 2