How Is the Heart Rate from a Regular ECG Tracing

How is the heart rate from a regular ECG tracing determined?

A) Count the number of ST segments in a 60-second strip
B) Multiply the number of QRS complexes in a 6-second strip by 10
C) Multiply the number of QRS complexes in a 10-second strip by 10
D) Count the P waves in a 20-second strip
E) Count the number of QRS complexes in a 30-second strip

Correct Answer:

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