Critical Care Exam 1 UPDATED ACTUAL Exam Questions and CORRECT ANSWERS
1 view 0 purchase
Course
Critical Care
Institution
Critical Care
Critical Care Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT
ANSWERS
P wave - CORRECT ANSWER- Depolarization of the atria
PR interval - CORRECT ANSWER- -Normal is 0.12 to 0.2 seconds
- onset of atrial depolarization until onset of ventricular polarization
QRS complex - CORRECT ANSWER- -Nor...
Critical Care Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT
ANSWERS
P wave - CORRECT ANSWER✔✔- Depolarization of the atria
PR interval - CORRECT ANSWER✔✔- -Normal is 0.12 to 0.2 seconds
- onset of atrial depolarization until onset of ventricular polarization
QRS complex - CORRECT ANSWER✔✔- -Normal is 0.06 to 0.11 seconds
-Ventricular depolarization
-systole
T wave - CORRECT ANSWER✔✔- -appears after QRS complex
- Ventricular repolarization
-Spiked T-wave occurs with hyperkalemia
U wave - CORRECT ANSWER✔✔- - repolarization of the purkinje fibers
- seen in patients with hypokalemia
SA node - CORRECT ANSWER✔✔- the pace-maker of the heart; where the impulse
conduction of the heart usually starts; located in the top of the right atrium just below
superior vena cava
*sends impulses 60-100 BPM
Normal Sinus Rhythm - CORRECT ANSWER✔✔- Rate is 60-100/ minute
Rhythm is regular
P wave present
PR interval: normal 0.12-0.20
,QRS complex:normal
Interpretation: normal sinus rhythm
normal QRS: 0.06- 0.10
Sinus Bradycardia - CORRECT ANSWER✔✔- Rate is <60/minute
Rhythm is regular
P wave present
PR interval: normal 0.12-0.20
QRS complex:normal
Interpretation: treat sinus brady with *0.5mg atropine ( if emergent)* , dopamine,
epinephrine, pacer.
*normal in patients when sleeping or sleeping
-may occur with use of Beta blockers or calcium channel blockers, digoxin, morphine, vagal
stimulation, hypothermia, hypothroidism
Sinus Tachycardia - CORRECT ANSWER✔✔- Rate is >100/min (usually below 160)
Rhythm is regular
P wave present
PR interval: normal 0.12-0.20
QRS complex:normal 0.6-0.10
Interpretation: correct the underlying cause, adminster beta blockers or calcium channel
blockers.
*treat underlying cause.**
- may be a normal response from a fever, exercise, anxiety, pain, dehydration. May
accompany shock, LHF, hyperthyroidism, anemia, hypovolemia, PE, MI
-can be caused by caffiene, nicotine, amphetemines, atropine, cocaine.
, Sinus Arrhythmia - CORRECT ANSWER✔✔- Rate: increases on inspiration, decreases on
expiration
Rhythm: *Always has irregular rhythm*
P waves?: yes
PR interval: normal
QRS: normal
Significance: usually a normal finding and usually is *not treated*
Premature Atrial Complexes - CORRECT ANSWER✔✔- Rate: normal
Rhythm:abnormal
P waves?: Yes, has *EARLY* p waves
PR interval? WNL
QRS:WNL
Significance:
*electrical impulses start in atrium BEFORE beat finishes
-CAUSES: stimulants, alcohol, anxiety, hypokalemia
-common in normal hearts*
- if EKG shows many, could be an early sign of SVT or A.fib
TREAT underlying cause (minimize stress, dont drink caffeine)
Atrial Flutter - CORRECT ANSWER✔✔- Rate: 250-400/min
Rhythm: regular
P waves: NO only flutter(sawtooth) waves are seen
PR interval: N/A
QRS: WNL
Significance:
SAWTOOTH 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 MGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.49. You're not tied to anything after your purchase.