EKG Plain & Simple Chapters 5 and 6

Which of the following is a method of calculating heart rate?

• Six-second strip method

• The OT interval method

• The P-P interval method

• All of the above

Regularity of a rhythm is determined by measuring the

• P-P intervals

• QRS intervals

• R-R intervals

• Distance between consecutive U waves

A regular rhythm is one in which the R-R intervals

• Vary by only one or two little blocks

• Do not vary at all

• Are the same as the

  P-P intervals

• Are interrupted by premature beats

An irregular rhythm is one in which

• The R-R intervals vary "all over the place"

• the R-R intervals vary by only one or two little blocks

• There are premature beats or pauses that interrupt the otherwise regular rhythm

• The ORS complexes do not look alike

Regardless of the method used, what are you doing when you calculate heart rate?

• Counting the number of P waves in a minute-long rhythm strip

• Counting the number of ORS complexes in a minute-long rhythm strip

• Counting the number of premature beats or pauses in a minute-long rhythm strip

• Counting the number of irregular blocks in a minute-long rhythm strip

The mean rate is calculated byThe mean rate is calculated by

• Counting the number of P waves in a minute-long rhythm strip

• Counting the number of QRS complexes in a minute-long rhythm strip

• Counting the number of QRS complexes on a six-second strip and multiplying by 10.

• Counting the number of P waves on a six-second strip and multiplying by 10

Atrial rate can be calculated by counting

• QRS complexes

• P waves

• PR intervals

• R-R intervals

Which of the following should you do when calculating a regular heart rate interrupted by pauses?

• Calculate the range fastest to slowest and calculate the mean rate

• Calculate the range slowest to fastest and calculate the mean

• Calculate only the mean rate and disregard the range

• Calculate only the range and disregard the mean rate

If the patient's rhythm changes, you should First

• Assess your patient for signs of decreased cardiac output

• Calculate the hear rate rate rhythm, and intervals

• Change the lead to see if the rhythm is real or if it's artifact

• look for P waves

The normal rhythm of the heart has P waves that are

• Upright, matching, and precede the ORS complex

• Variable in shape and location

• Often hidden inside QRS complexes

• Multiple in number, preceding the QRS complex