Dysrhythmias originating in the atria - answer✔premature atrial contractions
paroxysmal supra ventricular tachycardia
atrial flutter
atrial fibrillation
premature atrial contractions - answer✔rate: depends upon underlying rhythm
rhythm: usually regular except for PAC
pacemaker site: ectopic sites in atria
P waves: occurs earlier than expected
PRI: varies dependent on foci of impulse
QRS: usually normal
paroxysmal supra ventricular tachycardia - answer✔rate: 150-250 bpm
rhythm: regular
pacemaker site: atria (outside SA node)
P waves: often buried in preceding T wave
PRI: usually normal
QRS: usually normal
adenosine (adenocard): action - answer✔slows conduction through AV node
interrupts re-entry
will not convert a flutter or a-fib
**given rapidly: IVP, followed with saline flush
adenosine: S/E - answer✔brief period asystole
flushing
HA
lightheadedness
dizziness
nausea
SOB
rarely: chest pain
atrial flutter - answer✔rate: atrial, 250-350 bpm
ventricular rate: varies
rhythm: usually regular
pacemaker site: atrial (outside SA node)
P waves: F waves are present
PRI: usually normal
QRS: usually normal
Atrial Fibrillation (A-Fib) - answer✔rate: atrial rate: 350-750 bpm
ventricular: varies
rhythm: irregularly irregular
pacemaker site: atrial (outside of SA node)
P waves: none discernible; f waves present
PRI: none
QRS: normal
mechanism of A-fib - answer✔structural &/or electrophysiologic abnormalities alter atrial tissue
promoting abnormal impulse formation
caused by diverse mechanisms
Diltiazem (Cardizem): action - answer✔inhibits movement of Ca across cardiac and arterial
muscle
slows cardiac conduction
decreases contractility
dilates coronary arteries
administration of Diltiazem - answer✔IV infusion then oral
Interventions for Diltiazem - answer✔monitor VS
cardiac monitor
stop if:
medications: prevent thromboembolism - answer✔vitamin K agonist: warfarin (Coumadin)
heparin or enoxaparin (Lovenox)
Direct thrombin inhibitor: Dabigatran (Pradaxa), rivaroxaban (Xarelto), apixaban (Eliquis)
Vitamin K agonist: Warfarin (Coumadin) - answer✔target INR: 2.0 to 3.0
unless age > 75: 1.6-2.5
antidote:
heparin or enoxaparin (Lovenox) - answer✔until therapeutic warfarin OR when surgical
procedures
Target PTT:
Antidote:
4|Page
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 Brightstars. 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.
