A MA is preparing to calculate a patient's heart rate from an EKG tracing. Which methods should the MA use for this calculation?
1) Count the number of R waves in a 6-second strip and multiply by 10
2) Count the number of P waves in a 1-minute strip and multiply by 6
3) Count the number of QRS complexes in a 30-second strip and multiply by 2
4) Count the number of T waves in a 15-second strip and multiply by 4