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IBHRE Prep Exam Questions with Answers A+ Graded
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IBHRE Prep Exam Questions with Answers A+ Graded
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IBHRE Prep Exam Questions withAnswers A+ Graded
Voltage is? - -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? - -
15.15
I=V/R=5V/.33 k ohm
-If a unipolar lead wire has an insulation break one would expect the
resistance to? - -decrease
-for a wire fracture the resistance? - -increases
-if the output vlotage of the pacemaker is programmed from 5 volts to 2.5
volts, the energy delivered to the heart is? - -quartered
-Which of the following affect the longevity of the PM? - -output voltage,
resistance of lead and amount % pacing
-Which Pt's PM will last longer? - -#1: AMP=5V, L.R.=90, resistance
500ohms, PW=.5ms, 100%pacing
#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? - -Cell's membrane
capacitance, intracellular and extracellular resistance and threshold voltage.
-A patient on flecainide should? - -Have their threshold checked
-The acute threshold peaking is due to? - -Trauma and inflammation
-An advantage of bipolar leads is? - -They are less susceptible to EMI
-The two parameters that are important for ventricular sensing and should
be measured are? - -R-wave amplitude and slew rate
-If an external PM is set to a sensitivity setting of 5mV and some R-waves go
unsensed, then you should do the following - -Increase sensing by lowering
sensitivity to 2.5mV.
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