Normal ECG Values
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|
Dogs
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Cats
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Heart Rate
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60-180
|
180-220
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|
P Wave
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Width: 0.04 sec
Height: 0.4 mV
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Width: 0.04 sec
Height: 0.2 mV
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P-R Interval*
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0.06-0.15 sec
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0.05-0.09 sec
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QRS Interval**
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Width: 0.06 sec
Height: < 3.0 mV
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Width: 0.04 sec
Height: < 0.9mV
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Q-T Interval***
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0.15-0.25 sec (depending on HR)
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0.07-0.20 sec (depending on HR)
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S-T Segment
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No more than 0.2 mV elevation or depression
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No depression or elevation
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T-Wave
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positive, negative, or biphasic
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positive, negative, or biphasic
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*PR interval- beginning of P wave to the beginning of the QRS
** QRS interval- beginning to end of QRS
***QT interval- beginning of QRS to the end of the T wave