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Anatomy & Physiology
Measurements
Rates
Rhythms
Strips
100
The fastest inherent pacemaker of the heart located in the right atrium
What is the SA Node?
100
Measurement from start of electrical impulse through the SA node and down into the AV node in a normal heart, called the PR interval. (Amt of time)
What is 0.12 - 0.20 seconds?
100
Inherent rate of SA node.
What is 60-100 beats per minute?
100
Rhythm is _____ when R to R intervals are equidistant.
What is regular?
100
A rhythm strip that shows a regular rate of 90 with a p wave present before each narrow QRS complex and a normal PR interval.
What is normal sinus rhythm?
200
The second fastest pacemaker in the heart, located in the tissue between the right atrium and right ventricle.
What is the AV node?
200
Distance of the ventricular contraction, also known as the QRS complex.
What is 0.04 - 0.10 seconds?
200
Inherent rate of AV node.
What is 40-60 beats per minute?
200
Type of P waves that are occur at a regular rate, are upright, and present before every QRS complex.
What is regular p waves?
200
This is represented on the y axis of an EKG strip
What is time?
300
Connects the SA node and AV node
What are the internodal pathways?
300
Amount of time that passes on 1 small box on EKG strip.
What is 0.04 seconds
300
Inherent rate of purkinje fibers or ventricular tissue.
What is 20 - 40 beats per minute
300
PR intervals are all the same, and from .12 - .20 seconds (3 to 5 small boxes)
What is normal PR interval?
300
This is represented by the x axis on EKG strip
What is voltage or amplitute?
400
Ability of a cardiac cell to respond to an electrical stimulus
What is excitability?
400
Amount of time that passes during 1 large box (5 small boxes) on EKG strip.
What is 0.20 seconds
400
Heart rate for 15 small boxes or 3 large boxes.
What is 100 beats per minute?
400
Focal points or Foci can become irritated and cause this arrythmia.
What is tachycardia?
400
An electrical impulse traveling towards the positive lead will show this.
What is positive deflection?
500
Ability of cardiac cells to propagate or start an electrical impulse through the heart tissue
What is excitability?
500
Number of boxes needed to determine a 6 second strip.
What is 30?
500
Heart rate for 30 small boxes or 6 large boxes.
What is 50 beats per minute?
500
Rhythm that happens when an inherent pacemaker fails to fire.
What is an escape rhythm?
500
Flat part of EKG line that is neither positive or negative deflection.
What is the isoelectric line?