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17 Cards in this Set
- Front
- Back
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P wave
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atrial depolarization
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PR segment
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conduction delay thru AV node (200msec)
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QRS complex
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ventricular depolarization (<120msec)
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QT interval
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mechanical contraction of the ventricles
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T wave
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ventricular repolarization
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ST segment
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isoelectric, ventricles depolarized
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U wave
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caused by hypokalemia
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Peaked T wave
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caused by hyperkalemia
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Atrial Fibrillation
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irregularly spaced QRS complexes
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Atrial Flutter
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sawtooth
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1st degree block
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prolonged PR interval (>200)
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2nd degree block Mobitz 1
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"Wenckebach" progressive lengthening of PR until dropped beat
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2nd degree block Mobitz 2
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No change in PR interval, but ratio of P:QRS 2:1, 3:1, etc.
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3rd degree block (complete)
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atria and ventricles beat independently of each other
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Ventricular Fibrillation
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no identifiable waves. fatal without defibrillation and CPR
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ST elevation
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transmural infarct
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ST depression
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subendocardial infarct
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