cardiac ekg nurs 5

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9 Terms

1
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P=atrial contraction

no more then 0.12 seconds or 3 quares

<p>no more then 0.12 seconds or 3 quares</p>
2
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P-R segment

delay from AV node-allows time for atria to dump blood into ventricular.

P-R segment is after the P wave to begining of the Q wave

<p>delay from AV node-allows time for atria to dump blood into ventricular.</p><p>P-R segment is after the P wave to begining of the Q wave</p>
3
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PR interval

start of P wave to begining of QRS complex

QRS complex is no more then 0.12-0.20 seconds or 3-5 small squares

PR interval is first, second is PR segment

PR interval is the time it takes for electrical signial to go from atria to AV node

too long of a PR interval can indicate a HEART BLOCK

FIRST DEGREE HEART BLOCK PR=7.5 squares/0.30 seconds

<p>start of P wave to begining of QRS complex</p><p>QRS complex is no more then 0.12-0.20 seconds or 3-5 small squares</p><p>PR interval is first, second is PR segment</p><p>PR interval is the time it takes for electrical signial to go from atria to AV node</p><p>too long of a PR interval can indicate a HEART BLOCK</p><p>FIRST DEGREE HEART BLOCK PR=7.5 squares/0.30 seconds</p>
4
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QRS complex

contraction of ventricules

no more then 0.12 seconds/3 small squares

<p>contraction of ventricules</p><p>no more then 0.12 seconds/3 small squares</p>
5
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J point

QRS complex ends and ST segment begins

<p>QRS complex ends and ST segment begins</p>
6
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ST segment

completion of ventricular contraction and the begining of ventricular relaxation

ST segment should be flat

<p>completion of ventricular contraction and the begining of ventricular relaxation</p><p>ST segment should be flat</p>
7
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T wave

begining of ventricular relaxation

<p>begining of ventricular relaxation</p>
8
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Q-T interval

starts at QRS and ends after T wave

time ot takes for ventricles to contract and relax

0.35-0.44 seconds

<p>starts at QRS and ends after T wave</p><p>time ot takes for ventricles to contract and relax</p><p>0.35-0.44 seconds</p>
9
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U wave

A wave after the T wave =hypokalemia

low potassium

<p>A wave after the T wave =hypokalemia</p><p>low potassium</p>