Exam (elaborations)
Sharp ECG Study Guide QUESTIONS AND ANSWERS ALREADY PASSED 2024/2025
- Course
- Institution
Sharp ECG Study Guide QUESTIONS AND ANSWERS ALREADY PASSED 2024/2025
[Show more]
Content preview
Sharp ECG Study GuideLayers of the heart - ANSpericardium
myocardium
endocardium
pericardium - ANSoutermost layer: fibrous and serous
fibrous
-outer sack that anchors the heart
serous
-inner, fluid secreting membrane with two layers
-parietal (lines inner surface of fibrous sac)
-visceral (AKA epicardium) lines myocardium
-among the two is the pericardial area, with 10-30ml of fluid to provide the coronary heart space
to relax and agreement
myocardium - ANSi. Thick, center muscular layer that makes up the bulk of the coronary heart
wall
ii. Composed of cardiac muscle cells and is chargeable for the coronary heart's ability to
contract
endocardium - ANSi. Thin layer of tissue that lines the internal surface of heart muscle and
coronary heart chambers
ii. Extensions and folds of this tissue bureaucracy the valves of the heart.
4 number one traits of the heart - ANSautomaticity
excitability
conductivity
contractility
automaticity - ANSi. Specific to the pacemaker cells; potential to generate their very own
electrical impulse spontaneously
excitability - ANSAbility of ALL cardiac cells to respond to an electrical impulse
conductivity - ANSi. Ability of ALL cardiac cells to conduct an electrical impulse
contractility - ANSi. Specific to muscle cells; ability to reason cardiac muscle contraction
, electrons/ions accountable for depolarization/repolarization of the heart muscle - ANSPotassium
i. Primary ion within the cell
ii. Plays a function in depolarization and repolarization
Sodium
i. Primary ion outside the mobile
ii. Major role in depolarization
sodium-potassium pump - ANSi. Actively transports ions throughout the membrane in
opposition to the electrochemical gradient
ii. In a resting cardiac cellular, there are more terrible ions at the inside than the outside. This is
a resting, or polarized cellular. No electric activity is going on and there's an isoelectric (directly)
line on ECG
depolarization - ANSi. When a cellular is stimulated, potassium starts offevolved to leave the
cell, growing permeability to sodium
ii. Sodium rushes in, causing the interior of the cell to be greater tremendous than terrible
iii. Contraction is a mechanical method that FOLLOWS the electrical occasion of depolarization
repolarization - ANSi. Sodium-potassium pump activated to transport sodium out of the cell and
circulate potassium returned into the mobile
ii. Inside will become extra poor again
Positive, bad, and biphasic deflection - ANSi. Positive deflection: electric cutting-edge flowing in
the direction of the superb pole
ii. Negative deflection: electric powered modern flowing towards the poor pole
iii. Biphasic deflection: contemporary flowing far from each poles
ST segment - ANSST represents early ventricular repolarization
Measure .04 (one field) from J factor...
Elevation or despair is taken into consideration bizarre if displacement is extra than 1mm from
baseline
causes of ST elevation - ANSi. MI (STEMI)
ii. Coronary artery spasm (prinzmetal angina)
iii. Acute pericarditis
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 QualityPDF. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83637 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now