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CRM IBHRE questions and answers graded A+ 2025/2026
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CRM IBHRE questions and answers graded A+ 2025/2026
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CRM IBHRERheobase - ANSthe lowest factor on a power duration curve at an infinitely lengthy pulse
length
Chronaxie time - ANSthe pulse width at twice the rheobase price. It approximates the
maximum green stimulation pulse length
Charge (method) - ANSCharge= I(current) x T(time)
Energy (formula) - ANSEnergy(microjoules)= I(cutting-edge)xVxT
Functional Refractory Period - ANSthe coupling c program languageperiod which first
outcomes in a measurable degree of delay in impulse conduction
Effective Refractory Period - ANSthe longest coupling c programming language to be
associated with block
Devices with NO interplay with pacers - ANS1. Microwave oven, 2. CT
experiment/Ultrasound three. X-rays (diagnostic)
Devices that purpose brief or 1 beat inhibition - ANS1. EAS 2. Cellphones three. Arc Welding
four. Airport steel detector 5. TENS 6. Electric home equipment consisting of electric
powered blanket & power gear
Devices that can damage the pacemaker - ANS1. MRI 2. Defibrillator 3. Cardioversion 4.
Cautery/RF Ablation 5. Radiation Therapy
Resistance in Series - ANSSeries method the beginning of one resistance is hooked up to
any other
Sum the resistances: R1+R2= overall resistance. EX: A LEAD FRACTURE (fractures
INCREASE impedance)
Resistance in Parallel - ANSParallel approach all of the resistances are related to the equal
factor.
(R1xR2)/(R1+R2)= total resistance
EX: LEAD INSULATION DEFECTS (insulation defects DECREASE impedance)
Permanent pacemakers are steady voltage or steady current? - ANSALL permanent
pacemakers are consistent voltage devices.
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