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IBHRE Study Set (216 Questions) With All Correct Answers.
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IBHRE Study Set (216 Questions) With All Correct Answers.
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IBHREIBHRE Study Set (216 Questions)
With All Correct Answers.
What lead insulation materials are known for reducing fibroblast in growth and susceptibility to
MIO and ESC? - ✔✔✔ - ePTFE and 80A polyurethane
What are the two most common causes of ventricular safety pacing ? - ✔✔✔ - Ventricular
ectopy and loss of atrial sensing
What electrode material would most likely result in higher pacing thresholds and high
polarization? - ✔✔✔ - Elgiloy
Which phase of the action potential would correlate to the relative refractory period? - ✔✔✔ -
Phase 3
The ventricoloatrial conduction time of a pacemaker patient with a typical endless loop
tachycardia may be calculated by what equation? - ✔✔✔ - None
What parameter would not be useful to prevent typical crosstalk? - ✔✔✔ - Safety pacing
What conductor technology combines a silver core with a high strength metal (MP35N0) to
obtain a strong low resistance wire? - ✔✔✔ - DFT
Which of the current ICD capacitor technologies provide the highest energy density and does
not require reform? - ✔✔✔ - Tantalum electrolytic
IBHRE Page 1
,IBHRE
For treatment of arrhythmias, most drugs work by ? - ✔✔✔ - Altering conductivity or
refractoriness
What battery discharge curve shape does a lithium silver vanadium oxide battery make ? -
✔✔✔ - Two humps
1.67 Hz would equal how many bum? - ✔✔✔ - 100 bpm
T wave frequencies are typically ? - ✔✔✔ - Low
What is the electrical circuit that converts a signal with both positive and negative components
into a signal with only one component ? - ✔✔✔ - Rectifier
What would account for the most common cause of inappropriate mode switching ? - ✔✔✔ -
Atrial lead sensing ventricular signals
What is the primary reason that the lithium iodine battery has not been used for ICDs? - ✔✔✔
- The battery chemistry is only 2.8V
What is an example of a closed loop sensor ? - ✔✔✔ - Myocardial contractility
What programming changes would cause the most significant hit on an ICD battery longevity ? -
✔✔✔ - ATP during charge
Which of the following pace/sense lead designs would one expect the highest current density
with a bipolar impedance reading of 1100 ohms ? - ✔✔✔ - A Brady lead with an anode 5mm2
and cathode 1.2mm2
IBHRE Page 2
, IBHRE
What would the energy be given a voltage of 2V a pw of 1ms and an impedance of 400ohms? -
✔✔✔ - 10 uj
Which of the following conditions has been shown to cause an increase in stimulation threshold,
a wide qrs, latency or under sensing ? - ✔✔✔ - Hyperkalemiad
What is the estimated battery service life of a pacemaker with a 1 amp hr battery and a 20 micro
amp current drain ? - ✔✔✔ - 5.7 years
Which of the following clinical trial terms best describes patients analyzed in the group they
were randomized to regardless of whether they received or adhered to the intervention ? -
✔✔✔ - Intention to treat analysis
Which of the following RV leads would be least prone to anodal stimulation in an extended
bipolar configuration with a unipolar LV lead when BiV pacing ? - ✔✔✔ - An integrated ICD
lead with an anode 450mm2 and cathode 2mm2
The term virtuous electrode or fibrous capsule surrounding the electrode can mean ? - ✔✔✔ -
A normal foreign body reaction, an inexcitable capsule of tissue, decreases the current density at
the lead tissue interface
What would deplete a pacemaker battery most quickly ? - ✔✔✔ - Increase average current
drain
Which of the following is most responsible for the rapid repolarization phase 3 of the cardiac
action potential ? - ✔✔✔ - Outflow of K+
IBHRE Page 3
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