2024 N465C EXAM 1 REVIEW SET
EXAM WITH CORRECT ANSWERS
What causes the P-wave? - CORRECT-ANSWERSAtrial depolarization, which is
initiated by the SA node
How long should the PR interval be? - CORRECT-ANSWERSBetween 0.12 and
0.20 secs
What causes the QRS complex? - CORRECT-ANSWERSVentricular
depolarization (and atrial repolarization)
How long should the QRS complex be? - CORRECT-ANSWERS< 0.12 secs
What does the ST segment represent? - CORRECT-ANSWERSEarly
repolarization by the ventricles
What conditions may cause an increase in left-heart preload/PAWP? -
CORRECT-ANSWERSThink: What would cause more blood to be left in the left
ventricle?
What is one concern that the nurse would have when caring for a patient
with a decreased preload? - CORRECT-ANSWERSThe patient may experience
a decreased CO and CI
What is afterload? - CORRECT-ANSWERSThe pressure against which the left
and right ventricles has to pump in order to eject blood
- Afterload for the right ventricle is referred to as the PVR (pulmonary
vascular resistance)
- Normal range: 100-250 dynes
- Afterload for the left ventricle is referred to as the SVR (systemic vascular
resistance)
- Normal range: 900-1400 dynes
, What may cause an elevation in PVR? - CORRECT-ANSWERSThink: What
would increase the pressure that the right ventricle has to face in order to
pump blood to the lungs and upper half of body?
What may cause an elevation in SVR? - CORRECT-ANSWERSThink: What
would increase the pressure that the left ventricle has to face in order to
pump blood to the rest of the body?
- HTN
- vasopressor use
- aortic stenosis
- hypothermia
What may cause a decrease in SVR and PVR? - CORRECT-ANSWERSThese
factors are the same for both the left and right side
- septic, anaphylactic, or neurogenic shock
- use of vasodilators
- side effects of some medications (i.e., narcotics)
What is mixed venous oxygen saturation (SvO2)? - CORRECT-ANSWERS- It
measures the amount/concentration of O2 in the blood that has been
returned to the heart after circulating throughout the body for one cycle
- Normal range: 60-75%
What may cause a decrease in SvO2? - CORRECT-ANSWERSThink: What
would cause there to be a decrease in the amount of oxygen found in the
blood that is returning to the heart after circulating through the body?
- low cardiac output/index (CO/CI)
- low Hgb and Hct (which means low SaO2 as well)
- high O2 demand from the body due to: surgical pain, stress, trauma, fever,
shivering
What may cause an increase in SvO2? - CORRECT-ANSWERSThink: What
would cause there to be an increase in the amount of oxygen found in the
blood that is returning to the heart after circulating through the body?
- heavy sedation
- hypothermia
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 Elitaa. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.