Question

If you have 9 QRS in a 6 sec strip, you have a HR of what?

A. 60 bpm
B. 90 bpm
C. 120 bpm
D. 150 bpm

Answer 1

With 9 QRS complexes in a 6-second strip, the heart rate is 90 beats per minute since 9 multiplied by 10 gives 90 bpm.

Step-by-step explanation:

If you have 9 QRS complexes on a 6-second ECG strip, the heart rate (HR) can be calculated as follows: since there are 9 QRS complexes in 6 seconds, we multiply the number of complexes by 10 (since there are 10 six-second intervals in a minute) to get the HR per minute. Therefore, 9 QRS complexes multiplied by 10 equals 90 beats per minute (bpm). So, the correct answer is B. 90 bpm.