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IBHRE TEST INTERNATIONAL BOARD OF HEART RHYTHM EXAMINERS TEST | QUESTIONS AND CORRECT ANSWERS | GRADED A+ | VERIFIED ANSWERS | LATEST VERSION$27.99
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IBHRE TEST INTERNATIONAL BOARD OF
HEART RHYTHM EXAMINERS TEST |
QUESTIONS AND CORRECT ANSWERS |
GRADED A+ | VERIFIED ANSWERS |
LATEST VERSION
What test is typically performed during exercise with heart rates in the
range of 105-110bpm and was shown to have a negative predictive value
in the MADIT II and SCD-HeFT type patients ? ------CORRECT ANSWER--
-------------Microvolt t wave alternans
Faster and longer range telemetry, new therapies and physiologic sensors
in pacemakers requires higher peak power outside the range of Li/I2
batteries. Which of the following battery chemistires Is now incorporated
into some pacemakers? ------CORRECT ANSWER---------------Lithium silver
vanadium oxide and lithium carbon monofluoride
Which of the following tests is performed over 10-20 beats following a PVC
and whose absence is a predictor of cardiac mortality following an MI? ------
CORRECT ANSWER---------------Heart rate turbulence
What current ICD capacitor technologies provide the highest energy
density and does not require reformation? ------CORRECT ANSWER---------
------Tantalum Electrolytic
1.67 Hz would equal how many bpm? ------CORRECT ANSWER--------------
-100 bpm
1 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
ANSWER---------------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 ANSWER---------------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? ------CORRECT ANSWER---------------
Hyperkalemia (high potassium)
What is the estimated battery longevity of a pacemaker with 1.0 amp-hour
battery and 20 microamp drain ? ------CORRECT ANSWER---------------
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 ANSWER---------------Slew
rate
,The isovolumetric time from electrical depolarization of the heart to
mechanical systole describes what term? ------CORRECT ANSWER---------
------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 ANSWER---------------Micro volt t-wave alternans
Which battery chemistry is now incorporated into pacemakers? ------
CORRECT ANSWER---------------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? ------CORRECT
ANSWER---------------Micro volt t-wave alternans
What has NOT been used as ERI magnet response? ------CORRECT
ANSWER---------------Abrupt decrease in rate
What has NOT been used as an indicator of battery depletion? ------
CORRECT ANSWER---------------Pulse width stretching
The term virtual electrode describes? ------CORRECT ANSWER---------------
The lead electrode and surrounding myocardium
, The energy delivered by an icd is based on the relationship between what?
------CORRECT ANSWER---------------Initial voltage and final voltage on a
capacitor
The horizontal asymptote of a strength duration curve is termed: ------
CORRECT ANSWER---------------Rheobase
Over time, the battery cell impedance of a lithium iodine powered
pacemaker does what? ------CORRECT ANSWER---------------Remains
constant
Tapping on a pulse generator with which type of sensor will increase the
pacing rate? ------CORRECT ANSWER---------------Piezoelectric activity
A MDT style 3.2mm low profile lead with no sealing rings and a long pin fits
appropriately with which header? ------CORRECT ANSWER---------------VS-
1 B (sealing rings in header)
DBS (Drawn Brazed Strand) is a term associated with: ------CORRECT
ANSWER---------------Silver & nickel alloy conductor material
A likely benefit but possible concern of a ventricular detection enhancement
such as "stability" would be best described as what? ------CORRECT
ANSWER---------------Increase the specificity but decrease the sensitivity
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