IBHRE Review Exam || With Questions & Answers (100% Verified)
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IBHRE Review Exam || With Questions & Answers (100% Verified)
IBHRE Review Exam || With Questions & Answers (100% Verified)
Lithium iodine battery V? - ANSWER - 2.8V- not used for ICDs due to low peak power. Qmr
Lithium Iodine/ silver V? - ANSWER - 3.2V Qhr- used for ICDS
Which is an exam...
fluoroquinolone antibiotic is known for what cardi
drug interactions with amiodarone
low molecular weight heparin
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IBHRE Review Exam || With
Questions & Answers (100%
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, IBHRE Review Exam || With Questions
& Answers (100% Verified)
Lithium iodine battery V? - ANSWER - 2.8V- not used for ICDs due to low peak
power. Qmr
Lithium Iodine/ silver V? - ANSWER - 3.2V Qhr- used for ICDS
Which is an example of a closed loop sensor? - ANSWER - myocardial contractility
and O2 stat
Primary Sensor - ANSWER - detects changes in normal physiologic responses
Tertiary - ANSWER - detects changes as a result of exercise- piezo accelerometer
The smaller the cathode surface the- - ANSWER - higher the current density, lower
the threshold, and higher the impedance (2-6mm as small as 1.2)
Anode should be how much bigger than the cathode? - ANSWER - 3xs (4-20mm in
pacing leads)
ICD tip electrodes tend to run- - ANSWER - 2-10mm
Rv coil size? - ANSWER - 300-600mm
SVC coil size? - ANSWER - 400-860mm
OHMS LAW - ANSWER - V=I * R
ENERGY EQUATION (uJ) - ANSWER - V * I* PW
I is what? - ANSWER - Current- flow of electrons through a circuit
What can cause increase in threshold, wide QRS, latency, and undersensing? -
ANSWER - Hyperkalemia- high levels of potassium
Hypercalcemia can result in? - ANSWER - Short QT
Hypocalcemia can result in? - ANSWER - Long QT
Normal Potassium level? - ANSWER - 3.7-5.2
estimated battery life? Time= - ANSWER - Time= Q (battery capacity in Ah) / I
( current drain in amperes)
, Which of the following is necessary to initiate reentry tachy? - ANSWER -
unidirectional block of one pathway (travels down the slow up the fast) can be large
(WPW) or small (AVNRT)
Slew Rate - ANSWER - max rate of change between the sensing electrode and first
derivative on ECG
change in V/ Change in TIme
Frequency - ANSWER - # of times a signal fluctuates in 1 sec expressed in hertz
The Basic Unit of Capacitance is? - ANSWER - Farad
Basic Unit of Energy? - ANSWER - Joule
Unit of charge? - ANSWER - Coulomb= 1 amp per second
Microvolt T wave testing - ANSWER - measures beat to beat variations in the T
wave, performed with exercise ideally hr between 105 and 110
Heart Rate turbulence - ANSWER - looks at 10 to 20 beats following a PVC.
absence of it is the best non invasive prediction of cardiac mortality following a MI
Fluoroquinolone antibiotic is known for what cardiac effect? - ANSWER - prolonging
the QT
Zener Diode - ANSWER - protects the pacemaker circuitry from high external
voltages
rheobase - ANSWER - lowest possible voltage that will stimulate the myocardium at
any pulse duration
chronaxie - ANSWER - twice the rheobase voltage
watt-second - ANSWER - energy
AFFIRM - ANSWER - rate control vs rhythm control and they are equivalent
minute ventilation is the product of - ANSWER - respitory rate and tidal volume. Can
be triggered by arm movements
Battery capacitance of a pacemaker is given in? - ANSWER - Current
Excitable Gap - ANSWER - area of tissue in front of fibrillating wave that could
trigger a wave front block and terminate the tachycardia
Percent tilt of an ICD waveform? - ANSWER - decline in leading edge voltage at the
time of truncation
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