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==What is the cardiac frequency?==
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==What is the heart rate?==
 
[[Image:ECGpapier.png|thumb| The width of a square on the ECG represents time]]
 
[[Image:ECGpapier.png|thumb| The width of a square on the ECG represents time]]
 
[[Image:Ecgfreq.png|thumb| The countmethod to determine the heartfrequency. The second QRS-complex is between ''75'' and ''60'' beat per minute. This heartbeat is between that, around 65 beats per minute.]]
 
[[Image:Ecgfreq.png|thumb| The countmethod to determine the heartfrequency. The second QRS-complex is between ''75'' and ''60'' beat per minute. This heartbeat is between that, around 65 beats per minute.]]
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