100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
NUR 414 Exam 2 Dysrhythmias (CH. 34) £7.56
Add to cart
Quickly navigate to
Preview
  2.  
  3. Relias Dysrhythmia
  4.  
  5. Relias Dysrhythmia

Exam (elaborations)

NUR 414 Exam 2 Dysrhythmias (CH. 34)
 0 purchase
  • Module
  • Relias Dysrhythmia
  • Institution
  • Relias Dysrhythmia
  • Book
  • ECG Interpretation

NUR 414 Exam 2 Dysrhythmias (CH. 34) NUR 414 Exam 2 Dysrhythmias (CH. 34): Look @ 1st 5 Chapters of EKG books before next week Cardiac Conduction System: • The heart has a couple different functions  electrical system and mechanical system o Electrical system causes impulse to travel ...

[Show more]

Preview 4 out of 38  pages

Document information

  • December 8, 2023
  • 38
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

Subjects

  • nur 414 exam 2 dysrhythmias ch 34

Connected book

book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:

Written for

  • Relias Dysrhythmia
All documents for this subject (652)

Seller

avatar-seller
HIGHSCORE

Reviews received

Content preview

lOMoARcPSD|20734855




NUR 414 Exam 2
Dysrhythmias

, lOMoARcPSD|20734855




NUR 414 Exam 2 Dysrhythmias (CH. 34):
Look @ 1st 5 Chapters of EKG books before next week

Cardiac Conduction System:
• The heart has a couple different functions  electrical system and mechanical system
o Electrical system causes impulse to travel throughout cardiac tissue that will then initiate a
mechanical contraction of the heart
• Normally these impulses sent throughout tissue  stimulus to heart  causes contraction – if you do not
have contraction of heart then you do not have cardiac output
• Heart is simply a pump
• 4 chambers:
o atria top, ventricles bottom
• SA node:
o located in right atrium, pacemaker of the heart, this tissue is what causes an automatic
stimulus (leads to heart beat), normal HR is 60-100
o Supplied by sympathetic and parasympathetic nervous system
o anxiety can cause the sympathetic nervous system to stimulate HR to go up
• On EKG monitor we can see electrical activity- as stimulus going through atrial tissue it will show up
as a P wave on monitor = atrial depolarization – SA  AV node
• AV node:
o in the middle right above the septum (separates l and r side), slight delay here,  we want
impulse to travel through atrial tissue so it will contract and push blood from atria to
ventricles.
See delay between P and Q wave on EKG monitor
• After AV node impulse goes to bundle of his --> ? This is QRS on monitor – the ventricle (big muscle
of heart contract and cause big spike
• On EKG monitor at the end we see T wave – it is at rest and is about to start this cycle again
• SA  AV ()slight delay  bundle his  r and l bundle branches  perkinje fibers  start over
(ventricle gets ready to start process again)




Downloaded by Quiz Grade
()

, lOMoARcPSD|20734855




Conductivity or Electrical activity is different than the mechanical action of the heart beating


Properties of Cardiac Cells:
• Conductivity:
o each cell has the ability to transmit an impulse from one cell membrane to the next, how
we can have this conduction system from SA node  AV node, etc.
• Automaticity:
o talking about pacemaker cells only – nothing tells them they have to beat and send stimulus
out; they do all on own without any outside source telling them to do – independent of
anything else. Spontaneously initiates this
• Excitability:
o occurs with NON-pacemaker cells  ability to pick up an impulse and stimulus causes a
contraction. They’re excitable- respond to this stimulation
o All non-pacemaker cells can have stimulus to make them have a contraction (electrolyte
imbalances, etc. – any cell can initiate a stimulus because they are all excitable  leads to
dysrhythmia)
• Contractility:
o the ability of cells/muscle fibers to shorten when stimulated and cause a contraction causing
blood flow
• Refractory period:
o period where a stimulus will or will not cause a contraction to occur, unless there is a very
strong stimulus
▪ Absolute refractory period:
• time when regardless of how strong an impulse is, if it hits in this part of
cardiac cycle it WILL NOT cause a dysrhythmia, it is a SAFE ZONE!
Beginning of QRS and upslope of T wave
▪ Relative refractory period: Very strong stimulus can cause heart to go out
of rhythm. May put heart into a lethal dysrhythmia
• area we worry about
and get concerned –
vulnerable
period/danger zone –
when T wave down
slopes – if impulse is
strong enough and hits
here  dysrhythmias,
can lead to ventricular
dysrhythmias and can
be fatal –
VULNERABLE AREA
ON THAT T WAVE
DOWNWARD
SLOPE!




Downloaded by Quiz Grade
()

, lOMoARcPSD|20734855




ECG/EKG Monitoring:
• EKG- Measure electrical activity
o EKG is a one time reading, stop in time! 12 leads- 12 different views of the heart – limb leads
(electrodes) = on arms and legs, chest leads – on chest – benefit= provides a lot of different
views of heart that telemetry does not
▪ We want to see a change here, if they are having chest pain, check for ischemia
or infarction, electrolyte imbalance
o If change in cardiac rhythm (see change on telemetry) doctor will order EKG to confirm it
o Pt comes in think having heart attack – order 12 lead EKG bc looking at that will show what
artery is occluded causing this
o May order 12 lead EKG for electrolyte imbalance
o Gives 12 different views, pt must hold still to get good tracing
• Telemetry- portable EKG monitoring, 3-5 leads, tracing/ekg recording is only as good as electrodes
are place on pts. Need good skin prep and good placement of electrodes! – skin cleaned, dried,
won’t stick if sweaty or oily, may need to shave hair (won’t get good conduction) ideally electrodes
need flat surface on skin – do not put over bones-bone will act like an insulator (sternum, clavicle,
ribs-- but them in between)
o Telemetry is continuous monitoring
o Electrodes need to be moist, can’t be dried out
o Reapply every 24 hours, clean skin, reposition often
o Interpret strips in lead 2

ECG/EKG Paper:
• Vertical side – amplitude or voltage  not too concerned about this
• We are concerned about horizontal – looking at time, how we can interpret different dysrhythmias
• Tiny box = 400ths of a second = 0.04
• Big box = 5 little boxes = 2/10ths of a second = 0.20
• 5 big boxes = 1 second
• When interpreting strips – 6 second strip  have to have 30 large boxes


Downloaded by Quiz Grade
()

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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 HIGHSCORE. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £7.56. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

65040 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 15 years now

Start selling

Recently viewed by you

Other ·

(0)

Leren lezen en schrijven, cijfer: 7,8

Summary ·

(0)

Geschiedenis tijd van 1750 tm 1975

Summary ·

(0)

Samenvatting moraalfilosofie

Exam (elaborations) ·

(0)

MUS 354 Question and answers 100% correct

Essay ·

(2)

Public Services Unit 13 - P3 P4 P5 M2 M3 D2

Summary ·

(0)

Hfst 16 - Neerslag en complexvorming

Lecture notes ·

(0)

FIN333 Lecture Notes from class 3 - Depaul

Exam (elaborations) ·

(0)

Poli Saladino Questions and Answers 2024

Summary ·

(0)

alle hoorcolleges + literatuur week 7

£7.56
  • (0)
Add to cart
Added