If a patient’s heart rhythm isirregular,the first heart rate calculation method doesn’t work (as the R-R interval differs significantly throughout the ECG). As a result, you need to apply a different method:
Use the Six Second Count method. According to NurseCom.com, this is the most common (and simple) method to determine heart rate. Multiply the number of QRS complexes found over six seconds by 10. This will give you the number of QRS complexes in 60 seconds, or 1 minute. This is the ...