Exam (elaborations)
CCDS IBHRE ACTUAL EXAM LATEST VERSION 2024/2025 WITH QUESTIONS AND CORRECT ANSWERS GRADE A
- Course
- Institution
CCDS IBHRE ACTUAL EXAM LATEST VERSION 2024/2025 WITH QUESTIONS AND CORRECT ANSWERS GRADE A
[Show more]
Content preview
CCDS IBHRE ACTUAL EXAM LATEST VERSION2024/2025\\ WITH QUESTIONS AND CORRECT
ANSWERS GRADE A
Rheobase - CORRECT ANSWER ; the lowest point on a strength duration
curve at an infinitely long pulse duration
Chronaxie time - CORRECT ANSWER ; the pulse width at twice the
rheobase value. It approximates the most efficient stimulation pulse
duration
Charge (formula) - CORRECT ANSWER ; Charge= I(current) x T(time)
Furman's formula - CORRECT ANSWER ; Energy(microjoules)=
I(current)xV(voltage)xT(pulse width)
Ohms law formula - CORRECT ANSWER ; Voltage(electromotive
force)= I(current/flow of electrons) x R(resistance to current flow in
ohms)
Functional Refractory Period - CORRECT ANSWER ; the coupling
interval which first results in a measurable degree of delay in impulse
conduction
,Effective Refractory Period - CORRECT ANSWER ; the longest coupling
interval to be associated with block
Devices with NO interaction with pacers - CORRECT ANSWER ; 1.
microwave oven, 2. CT scan/Ultrasound 3. X-rays (diagnostic)
Devices that cause transient or 1 beat inhibition - CORRECT ANSWER ;
1. EAS 2. Cellphones 3. Arc Welding 4. airport metal detector 5. TENS
6. Electric appliances such as electric blanket & power tools
Devices that may damage the pacemaker - CORRECT ANSWER ; 1. MRI
2. Defibrillator 3. Cardioversion 4. Cautery/RF Ablation 5. Radiation
Therapy
Resistance in Series - CORRECT ANSWER ; Series means the beginning
of one resistance is connected to another
Sum the resistances: R1+R2= total resistance. EX: A LEAD
FRACTURE (fractures INCREASE impedance)
Resistance in Parallel - CORRECT ANSWER ; Parallel means all the
resistances are connected to the same point.
(R1xR2)/(R1+R2)= total resistance
,EX: LEAD INSULATION DEFECTS (insulation defects DECREASE
impedance)
Permanent pacemakers are constant voltage or constant current? -
CORRECT ANSWER ; ALL permanent pacemakers are constant voltage
devices.
SOME temp pacemakers are constant voltage, most are constant current.
LOAD - CORRECT ANSWER ; Load refers to impedance (or resistance)
applied to a circuit.
A system with a SMALL load (low impedance) applied to the circuit is
said to be a constant current device
A system with LARGE load is said to be a constant voltage device
Guidelines for Permanent Pacing - CORRECT ANSWER ; 1. Patient is
symptomatic
2. The heart rate is less than 40 bpm
3. Asystole of greater than 3 seconds is documented
NOTE: Pt may be asymptomatic with 2 or 3
, Slew Rate - CORRECT ANSWER ; Slew rate = peak slope of an
electrogram
slew rate= change in voltage/ change in time
Normal slew rate in atrium - CORRECT ANSWER ; >.3 V/s
Normal slew rate in ventricle - CORRECT ANSWER ; >.5V/s
Steroid used in electrodes - CORRECT ANSWER ; dexamethasone
sodium phosphate in the silicone core(a corticosteriod)
Steroid-Eluting Electrodes - CORRECT ANSWER ; 1. The acute
threshold is relatively flat compared to non-steroid electrodes
2. The initial capture threshold is similar to non-steroid leads
Silicone Rubber lead insulation Pros - CORRECT ANSWER ; 1. Can
easily be repaired
2. Flexible
3. Proven performance history
4. Easy to make
Silicone Rubber lead insulation cons - CORRECT ANSWER ; 1. high
friction coefficient
2. Absorbs lipids
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller tutorWADE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $19.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78998 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now