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Understanding EKGs

Basics of Cardiac Electrophysiology
by

Ben Rieke

on 17 February 2014

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Transcript of Understanding EKGs

Dysrhythmias
Physiologic Principles
Nursing Considerations
and Assessment
Defibrillation vs. Cardioversion
Defibrillation is a non-synchronus pulse of electricity that 'jolts' the heart into a normal rhythm
Drugs
Atropine
Amiodarone
Epinephrine
Lidocaine*
Magnesium Sulfate
Procainamide*
Vasopressin

Understanding EKGs
Basics of Cardiac Electrophysiology
Electrical Foci
Electrical impulses begin at SA node, travels distally through the AV node; depolarizes AV bundle branches and Purkinje fibers
SA node and AV node are modulated by Vagus nerve and PNS
Rhythm and Conduction

PART OF CONDUCTION SYSTEM RATE

SA node 60-100 times/min

AV node 40-60 times/min

Bundle of His, Purkinje fibers 20-40 times/min

In the absence of nervous system innervation, the cardiac electrical foci are
Remember that normal pulse rate is 60 to 100 bpm

autorhythmic
Action Potential
Waveform Basics
Are they symptomatic?
Is there an abnormal tracing?
Are their VS abnormal?
Heart Block
Tachycardia and Bradycardia
Atrial Dysrhythmias
Ventricular Dysrhythmias
Asystole
Second Degree Type II
Mobitz II
Both may cause symptoms, or may not
Artial fibrillation
versus NSR
Premature ventricular contraction
Do not shock- start CPR immediately!
Shock advised!-->CPR
Cardioversion is a synchronized pulse of electricity that paces the rhythm of the heart to a normal rate
0.5mg IV q.3-5 mins up to 6mg.
300mg IV x1
1mg IV q.3-5 mins with no max
Dosage varies (situation dep.)
1-2 grams IV x1
1-6mg/min IV (situation dep.)
40 units IV x1
Shock
Everbody
Shock
All
Shock
Little*
Shock
Maybe
Shock
Full transcript