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25 Cards in this Set
- Front
- Back
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What does the T wave represent?
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Ventricular repolarization
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What does the PR segment represent?
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Delay in the AV node.
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What does the QRS represent?
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Ventricular depolarization. Normal reading >.12 seconds.
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How is the PR Interval measured and what normal measurement?
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From the beginning of P wave to the very beginning of the QRS. Normal measure is .12-.20 sec.
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What does the P wave represent?
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Atrial Depolarization.
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List four external interferences that can be produced on the EKG.
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Muscle tremors
shivering patient movement loose electrodes 60-cycle electrical current. |
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If the electrical flows towards the positive electrode, what direction the deflection will be?
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Upright deflection.
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If the electrical flow moves toward the negative electrode, what direction the deflection will be?
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Downward deflection.
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How many Leads do you nd to know to interpret arrhythmias?
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One; only a monitoring Lead.
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Which chambers contract first in single cardiac cycle?
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The atria.
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What do the vertical lines on the graph paper tell you?
What do the horizonatl lines on the graph tell you? |
Time
Voltage |
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A strip that haves a consistent irregular pattern is called?
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Regular Irregular.
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A strip that haves a reading hard or can't measure is called?
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Totally Irregular.
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A strip that you can measure is called?
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Basically Irregular.
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What does Pulse mean?
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The flow of blood thru an arterial wall.
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If the rythm is regular what is the most accurate way to measure the BMP?
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Count the No# of small squares between to R waves and divide total by 1500.
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What is a second way to measure BMP w/ regular rhythm on a strip.
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Count the No# of large boxes between two R waves and divide by 300.
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What is third way to measure a BMP on a strip?
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Count the of R waves in 6-second strip and multiply by 10.
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What is a cardiac cycle on the EKG?
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Electrical impulses associated with a single heart beat; P,Q,R,S and T.
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What is the name of the normal cardiac rhythm with a healthy heart which means it will read:
1. Regular, bpm of 60 -100, QRS of less than .12sec.,a round and smooth p wave and a PRI of .12-.20.sec. |
Normal Sinus Rhythm (NSR).
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How can you tell whether or not an arrhythmia is regular?
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Measure the R-R interval or the P-P interval.
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What does a normal sinus P wave look like?
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It has a smooth rounded shape and upright & uniform.
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What is "supraventricular" arrhythmia?
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An arrhythmia that originates above the ventricles.
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If a QRS complex measures more the .12 seconds, what can this mean?
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That the rhythm is supraventricular or a rhythm that started in the ventricles and/or delay in Ventricular conduction.
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What does it mean when the P wave is said to be "lost" in the T wave?
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It means that the P wave occured very close to the T wave and is covered or obcured and you can't idnetify it.
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