The mean rate is calculated by
A)Counting the number of P waves in a minute-long rhythm strip.
B)Counting the number of QRS complexes in a minute-long rhythm strip.
C)Counting the number of QRS complexes on a six-second strip and multiplying by 10.
D)Counting the number of P waves on a six-second strip and multiplying by 10.

Question

Quizplus · Accepted Answer

The most accurate way to calculate the mean rate is to count the number of QRS complexes on a six-second strip and then multiply by 10 to get the rate for a full minute. This is because the six-second strip allows for a more precise measurement of the heart rate than counting for a full minute, which may not be exact due to irregularities in the rhythm. Counting P waves may not be accurate if there is a difference in the rate of the atria and the ventricles, whereas counting QRS complexes ensures that the rate measured is for the ventricles.

The Mean Rate Is Calculated by