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The EKG Waveform
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The T Wave
The T wave corresponds to the rapid ventricular repolarization. The wave is normally rounded and positive. The T wave can become inverted, peaked or flattened due to electrolyte imbalance, hyperventilation, CNS disease, ischemia or myocardial infarction.
 
The animation below shows the ventricles repolarizing during the T wave. The animation had been slowed about 10 times the normal heart rate to show the details.

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Last Updated: 01/03/00.
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