Exam (elaborations)
IBHRE Exam Questions and Answers
- Course
- Institution
IBHRE Exam Questions and Answers
[Show more]
Content preview
IBHRE Exam Questions and AnswersCRT: Non responders and hyperresponders - Answer -- 30% of CRT pts are "nonresponders"
- In a subset of patients CRT therapy resulted in normalization of LV function. This finding is observed exclusively in the subgroup of patients with nonischemic DCM and suggests that LBBB may be the causal factor DCM in this subgroup of pts.
Where are LV leads implanted - Answer -Lateral or posterolateral wall
CRT non-responder likely result of - Answer -- pt selection. does not have mechanical dyssynchrony
- lead placement. not mid lateral or may have had lateral wall infarct
- suboptimal programming: AV or VV timing
Brugada and SIDS - Answer -- Genetically determined SCN5A
- Loss of function mutations in SCN5A in 20% of brugada syndome pts
-SCN5A accounts for about half of channelopathic SIDS cases
-RBBB, ST elevation precordial leads
- Untreated- Death
-May be treated by ICD
- EKG is definite marker in symptomatic and asymptomatic pts
Brugada syndrome - Answer -- Progressed from being a rare disease to one that is second only to automobile accidents
- Electrocardiographically characterized by a distinct ST-segment elevation in the right precordial leads, the syndrome is associated with a high risk for SCD in young and otherwise healthy adults, and less frequently in infants and children
-patients with spontaneously appearing Brugada ECG have a high risk for sudden arrhythmic death secondary to VT/VF. The ECG manifestations of Brugada syndrome are often dynamic or concealed.
Silicone Rubber - Answer -- proven history
- longevity > 15 years
- very flexible
- repairable
- easy to process
-can tear
- reasonable tough
- thicker walls - can abrade
- high coefficient of friction
- larger diameter
Polyurethane (80A) - Answer -- adverse history
- longevity <7 years
- flexible
- not repairable
- very process dependent
- somewhat tear resistant
- tougher
-thinner walls
-abrasion resistant
- low coefficient of friction
- smaller diameter
Polyurethane (55D) - Answer -- most currently used
- proven history
- > 12 years
- less flexible
- not repairable
- easy to process
-very tear resistant
-very tough
- thinner walls than 80A
- abrasion resistant
-May be more prone to RV perforation
Silicone insulation - Answer -- Advantages: w/p any known long term degradation. Inert,
biocompatible, and biostable.
- disadvantages: high friction coefficient (sticky), Handling damage, and size. Soft, prone to damage during implant
Expanded Polytetrafluoroethylene ePTFE - Answer -- ePTFE is a gortex type material that has been shown to improve the ease of extraction due to reducing the degree of fibrous growth, especially on the shocking coils.
- the material is electrically inert and does not effect the DFTs.
-can be removed more easily than non- ePTFE leads*
- is a stable biomaterial with a chemical structure consisting of a carbon backbone with flourine atoms which form a protective sheath, producing a chemically inert material with
low energy surface properties. - made by mechanically stretching and orienting PTFE to create a porous material with high tensile strength and flexibility.
Fluoropolymers (PTFE, ETFE) Insulation - Answer -- Advantages: inert, most biocompatible, high tensile strength, small size
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 millyphilip. 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)
81113 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now