Exam (elaborations)
CCDS IBHRE questions and answers graded A+ 2025/2026
- Course
- Institution
CCDS IBHRE questions and answers graded A+ 2025/2026
[Show more]
Content preview
CCDS IBHRERheobase - ANSthe lowest factor on a electricity duration curve at an infinitely lengthy pulse
period
Chronaxie time - ANSthe pulse width at twice the rheobase cost. It approximates the most
green stimulation pulse duration
Charge (formulation) - ANSCharge= I(cutting-edge) x T(time)
Furman's components - ANSEnergy(microjoules)= I(present day)xV(voltage)xT(pulse width)
Ohms regulation system - ANSVoltage(electromotive force)= I(cutting-edge/float of
electrons) x R(resistance to contemporary waft in ohms)
Functional Refractory Period - ANSthe coupling interval which first consequences in a
measurable diploma of postpone in impulse conduction
Effective Refractory Period - ANSthe longest coupling c language to be related to block
Devices with NO interaction with pacers - ANS1. Microwave oven, 2. CT scan/Ultrasound 3.
X-rays (diagnostic)
Devices that reason transient or 1 beat inhibition - ANS1. EAS 2. Cellphones three. Arc
Welding four. Airport steel detector five. TENS 6. Electric appliances consisting of electric
blanket & power tools
Devices which could damage the pacemaker - ANS1. MRI 2. Defibrillator 3. Cardioversion
four. Cautery/RF Ablation five. Radiation Therapy
Resistance in Series - ANSSeries way the start of one resistance is hooked up to any other
Sum the resistances: R1+R2= general resistance. EX: A LEAD FRACTURE (fractures
INCREASE impedance)
Resistance in Parallel - ANSParallel way all the resistances are related to the same point.
(R1xR2)/(R1+R2)= general resistance
EX: LEAD INSULATION DEFECTS (insulation defects DECREASE impedance)
Permanent pacemakers are regular voltage or steady modern? - ANSALL everlasting
pacemakers are constant voltage gadgets.
,SOME temp pacemakers are consistent voltage, most are consistent contemporary.
LOAD - ANSLoad refers to impedance (or resistance) implemented to a circuit.
A gadget with a SMALL load (low impedance) applied to the circuit is said to be a steady
contemporary device
A device with LARGE load is said to be a regular voltage tool
Guidelines for Permanent Pacing - ANS1. Patient is symptomatic
2. The heart rate is less than forty bpm
3. Asystole of extra than 3 seconds is documented
NOTE: Pt may be asymptomatic with 2 or three
Slew Rate - ANSSlew fee = height slope of an electrogram
slew price= trade in voltage/ exchange in time
Normal slew price in atrium - ANS>.Three V/s
Normal slew rate in ventricle - ANS>.5V/s
Steroid utilized in electrodes - ANSdexamethasone sodium phosphate inside the silicone
center(a corticosteriod)
Steroid-Eluting Electrodes - ANS1. The acute threshold is exceedingly flat as compared to
non-steroid electrodes
2. The initial seize threshold is similar to non-steroid leads
Silicone Rubber lead insulation Pros - ANS1. Can easily be repaired
2. Flexible
three. Proven performance history
4. Easy to make
Silicone Rubber lead insulation cons - ANS1. Excessive friction coefficient
2. Absorbs lipids
three. More thrombogenic and fibrotic
four. Cuts effortlessly
5. Tears without difficulty if suture tied too tightly
6. Large diameter
Polyurethane 80A - ANSBAD
Polyurethane 55D - ANSGOOD
polyurethane lead insulation execs - ANS1. Notably nonthrombogenic/fibrotic
, 2. Thin walls
three. Excessive tear friction
4. Resists slicing
5. Low friction coefficient
polyurethane lead insulation cons - ANS1. Can not be repaired
2. Particularly stiff
3. Hard to make
Pacemaker Syndrome Causes - ANS1. Loss of AV synchrony
2. Sustained retrograde conduction
3. A single ventricular fee whilst charge modulation is required for exercising
Approx 25% of patients most effective paced from the ventricle can also have a few stage of
severity associated with pacemaker syndrome
Pacemaker syndrome prognosis - ANS1. Observe fluctuation inside the peripheral blood
strain
2. Cannon "A" wave in the neck
three. History alone
Pacemaker syndrome management - ANSRestore AV synchrony
in ventricular most effective PM -->decrease the pacing fee to minimize ventricular most
effective pacing
DO NOT boom the pacing price
Fallback - ANS1. Decouples atrial & ventricular activities on the top fee restriction
2. The ventricular inhibited pacing price then progressively decrements to a programmed
decrease or "fallback" price over a programmed length
three. When the fallback price is reached, atrial synchrony is restored
Rate smoothing - ANS1. Eliminated massive cycle to cycle versions by way of preventing
paced rate from converting extra than a sure percent (3%, 6%, 12%, and so forth) from one
V-V c programming language to the subsequent
2. Eliminates massive fluctuations in fee during constant-ratio or psuedo-Wenckebach block
FOUND IN GDT devices
sensor higher rate conduct - ANSif the sinus charge is quicker than the sensor indicated fee,
P synchronous pacing happens
if the sensor indicated rate is faster, AV pacing at the sensor indicated charge happens
blended scenario: when the device is sensor driven AV pacing for a few cycles and a sinus
rate unexpected emerges faster than the sensor indicated fee. The sensor driven atrial
output may be inhibited, a PR c programming language began, and a ventricular output will
arise at the stop of the sensor AV interval. That is, the ventricular price may be identical to
the sensor indicated fee, but the PV c language can be longer than expected
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 Rosedocs. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79223 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now