Author Question: If a QRS complex measures less than 0.12 sec, you know that it did NOT originate in the: A) SA ... (Read 55 times)

natalie2426 · **on:** Jul 2, 2018

If a QRS complex measures less than 0.12 sec, you know that it did NOT originate in the:

A) SA node.
B) atria.
C) AV junction.
D) ventricles.

Question 2

Which of the following is the LEAST accurate way to determine heart rate?

A) Count the number of QRS complexes in a 6-sec strip and multiply by 10.
B) Count the number of large squares between two R waves and divide that into 300.
C) Count the number of small squares between two R waves and divide that into 1500.
D) Use a rate meter.