CCDS IBHRE Questions and Correct Answers the Latest Update
2 views 0 purchase
Course
CCDS IBHRE
Institution
CCDS IBHRE
Rheobase
the lowest point on a strength duration curve at an infinitely long pulse duration
Chronaxie time
the pulse width at twice the rheobase value. It approximates the most efficient
stimulation pulse duration
Charge (formula)
Charge= I(current) x T(time)
Furman's formula
Energy(mi...
✓ 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
✓ 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?
✓ ALL permanent pacemakers are constant voltage devices.
✓
✓ SOME temp pacemakers are constant voltage, most are constant current.
LOAD
✓ 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
✓ 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
✓ dexamethasone sodium phosphate in the silicone core(a corticosteriod)
Steroid-Eluting Electrodes
✓ 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
✓ 1. Can easily be repaired
✓ 2. Flexible
✓ 3. Proven performance history
✓ 4. Easy to make
Silicone Rubber lead insulation cons
Examify | Smart Grades | Latest update
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 TestTrackers. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.