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You are @ ECG Tutorial * Normal ECGs

Normal ECG 25mm/sec                         Normal ECG 50mm/sec

Paper speed 25mm/sec, calibration 1cm=1mV                                 Paper speed 50mm/sec, calibration 1cm=1mV

 

Sinus Arrhythmia

A Sinus Arrhythmia is a naturally occurring variation in heart rate in dogs that occurs during a breathing cycle, and it is considered normal.  It is abnormal in cats.
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