Would the amplitude of the EKG PQRST current fluctuate at ordinary heart rate and and exceptional?

Would the amplitude of the EKG PQRST wave be different at common heart rate and and abnormal?

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Answers:    Usually the amplitude of PQRST should not change beside change in heart rate.

Slight peak of the P waves can rarely come to pass with fast rate, but this is once in a while significant. Similarly, slight shortening of the QRS height can theoretically go on with fast rates due reduced time for ventricular wadding. This is also practically insignificant.
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