Jul 27, 2017 · Attain a 6 second EKG strip (30 large boxes) and multiply the number of p-waves in the six second strip by 10 to determine the number of atrial beats in one minute. To determine the number of ventricular contraction multiply the number of r-waves in the 6 second EKG strip by 10.

There are many ways you can count a heart rate on an EKG, but I find the six second rule to be the easiest and fastest way. In addition, the six second rule is great for counting heart rhythms that aren’t regular like, atrial fibrillation, atrial flutter, sinus arrhythmia, sinus rhythm with PVCs etc.

A heart rate can be calculated from a six-second segment of an EKG strip by counting the number of R waves in the section and multiplying by 10, according to RnCeus.com. Each small square on an EKG strip's horizontal axis represents 0.04 seconds, so a six-second segment is .