What is the most accurate method for measuring heart rate?

The most accurate method for measuring heart rate is counting R-R intervals. This method involves measuring the distance between successive R waves on an EKG strip. Each R-R interval represents one complete cardiac cycle, and by calculating the number of R-R intervals in a specific time frame, you can derive the heart rate with precision, especially when conducted over a longer period to minimize errors from irregular heartbeats.

While the 1500 method, which divides 1500 by the number of small squares between R waves on an EKG to calculate heart rate, can also be accurate, it is primarily a secondary method and less commonly relied upon than directly counting the intervals. Other methods, like using a wrist monitor or carotid pulse checks, may provide estimates of heart rate but lack the precision of measuring R-R intervals, particularly in a clinical setting where accurate data is crucial.