CCRN AACN 2024/2025 EXAM 330
QUESTIONS AND CORRECT ANSWERS
atrial fibrillation adverse consequences - ANSWER- 1. decreased cardiac
output due to loss of atrial kick, rapid ventricular rate, irregular ventricular
rhythm
2. tachycardia induced cardiomyopathy - in rapid afib for prolonged period
of time
3. thromboembolism
right bundle branch - ANSWER- -right side of the interventricular septum
and right ventricle
-impulse travels slower as the right ventricle is smaller/thinner
left bundle branch - ANSWER- two main divisions: anterior fascicle and
posterior fascicle carrying impulses to the left ventricle
PR interval - ANSWER- delay of AV node to allow filling of ventricles
,QRS complex - ANSWER- ventricular depolarization
shape depends on the lead that is being monitored and the ventricular
activation device
T wave - ANSWER- ventricular repolarization
normally in the same direction as the QRS
upright, flat, inverted
pathologies of T wave - ANSWER- MI, E/L levels, drug effect, myocardial
disease, and lead being recorded
u wave - ANSWER- repolarization of the purkinje fibers
SHOULD BE POSITIVE especially when T wave is positive
large u waves can be seen when repolarization is abnormally prolonged -
E/L imbalances like hypokalemia, hypocalcemia, hypomagnesemia, IICP,
LVH, certain medications
ST segment - ANSWER- early ventricular repolarization
should be at isoelectric line
,J point - ANSWER- where QRS complex ends and ST segment begins
QT interval - ANSWER- ventricular depolarization and repolarization varies
with age, gender, and heart rate
normalizes for HR
long QTc --> torsades, ventricular arrhythmia, Vfib
vertical axis - ANSWER- each small box is 1mm or 0.1 mV
each large box is 5mm or 0.5 mV
most common complication of ischemic heart disease and MI - ANSWER-
dysrhythmias
best leads for differentiating wide QRS rhythms - ANSWER- v1 and v6
v1 and v6 - ANSWER- helps to differentiate VTACH from SVT with
aberrant intraventricular conduction
, helps to recognize right and left bundle branch blocks
differentiates between right and left ventricular ectopy
differentiates between right and left ventricular pacing
v1 and v6 placement - ANSWER- v1 - fourth intercostal space at the right
sternal border
v6 - left midaxillary line at the v4 level (fifth intercostal space midclavicular
line)
primary dysrhythmia monitoring lead - ANSWER- V1
what is lead II used for? - ANSWER- used to identify atrial activity if unclear
in other leads or for visualization of R waves during synchronized
cardioversion
rhythms with a short PR interval - ANSWER- may indicate presence of
accessory pathway
lead III or avF - ANSWER- assists in diagnosis of hemiblock
allows identification of retrograde P waves
allows identification of atrial flutter waves
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 Anahsmith. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $26.60. You're not tied to anything after your purchase.
