IBHRE Prep Exam Questions with Complete Solutions (Latest 2025) Voltage is? - Correct Answers ✅The electromotive force pushing on electrons If the PM output voltage is 5v and the measured lead resistance is 330 ohms, then the current that flows out of the pacemaker into the heart is? - Correct Answers ✅15.15 I=V/R=5V/.33 k ohm If a unipolar lead wire has an insulation break one would expect the resistance to? - Correct Answers ✅decrease for a wire fracture the resistance? - Correct Answers ✅increases if the output vlotage of the pacemaker is programmed from 5 volts to 2.5 volts, the energy delivered to the heart is? - Correct Answers ✅quartered Which of the following affect the longevity of the PM? - Correct Answers ✅output voltage, resistance of lead and amount % pacing
Which Pt's PM will last longer? - Correct Answers ✅#1:
AMP=5V, L.R.=90, resistance 500ohms, PW=.5ms, 100%pacing 1 / 2
IBHRE Prep Exam Questions with Complete Solutions (Latest 2025)
#2: AMP=5V, L.R.=60, resistance 500ohms, PW=.5ms,
100%pacing
#3: AMP=2.5V, L.R.=60, resistance 330ohms, PW=.5ms,
100% pacing
(#4: AMP=2.5v, L.R.=60, resistance 500ohms, PW=.5ms,
50%pacing) The strength duration curve is dependent on the? - Correct Answers ✅Cell's membrane capacitance, intracellular and extracellular resistance and threshold voltage.A patient on flecainide should? - Correct Answers ✅Have their threshold checked The acute threshold peaking is due to? - Correct Answers ✅Trauma and inflammation An advantage of bipolar leads is? - Correct Answers ✅They are less susceptible to EMI The two parameters that are important for ventricular sensing and should be measured are? - Correct Answers ✅R-wave amplitude and slew rate
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