It's Electric
When there is an electrical difference across the membrane of a cell.
What is polarization?
0.12 to 0.20 sec
What is a normal PR interval?
Atrial tachycardia, AVNRT, and AVRT.
What are 3 types of SVT?
6 mg rapid IVP followed by 20 ml rapid flush
Second dose 12 mg rapid IVP followed by 20 ml rapid flush.
What is the dose for Adenosine?
Delivery of an electrical shock to the heart timed to occur during QRS.
What is synchronized cardioversion?
The period of recovery that cells need after being discharged before they are able to respond to a stimulus
What is the refractory period?
0.11 sec or less
What is the normal QRS duration?
irregular rhythm with 3 distinct and different P waves, narrow QRS.
What is MAP or WAP
15-20 mg IVP over 2 min (0.25mg/kg)
Second dose 20-15 mg IVP over 2 min (0.35 mg/kg)
What is the dose for diltiazem?
Delivery of electricity in milliamps to stimulate each heart beat.
What is transcutaneous pacing?
The leads that look at the inferior wall of the heart.
What are leads II, III, and aVF.
0.20 second
What is the width of each large box on ECG paper?
The classical wave form in atrial flutter.
What is sawtooth F wave?
The dose for Procainamide
What is 20 mg/min IV infusion until the following:
Arrhythmia suppression, hypotension, QRS widen by 50%, max dose 17mg/kg
100-200 j
What joules should you use for synchronized cardioversion?
The lateral surface of the heart is viewed by these leads.
What are leads I and aVL?
0.04 second
What is the width of a small box on ECG paper?
f waves
What are the atrial waves in atrial fibrillation called?
0.5 mg IVP, may repeat every 3-5 up to 3 mg.
What is the dose of atropine for symptomatic bradycardia?
Hypotension, signs of shock, acute heart failure, AMS, of ischemic type chest pain with a tachydysrhythmia.
What are the indications for synchronized cardioversion?
When cells cannot be stimulated to conduct an electrical impulse, no matter how strong the stimulus
What is the absolute refractory period (ARP)?
More than 0.03 second or more than 30% of the height of the following R wave in that lead.
What is the criteria for a pathologic Q wave?
Irregularly irregular, no P waves, narrow complex with a rate >100.
What is uncontrolled atrial fibrillation?
2-20 mcg/kg/min, titrate to desired response.
What is the dose of dopamine for symptomatic bradycardia?
0.15 mg/kg of etomidate
What is the medication and dose to give for sedation for cardioversion?