Final answer:
The '1500 method' for determining heart rate from an EKG involves counting the number of small squares between R-R intervals and dividing 1500 by that number to get the heart rate in beats per minute.
Step-by-step explanation:
To determine a patient's heart rate from an EKG tracing using the '1500 method', follow these steps:
- Identify the R waves on the EKG, which are the upward spikes associated with ventricular depolarization.
- Count the number of small squares between two consecutive R waves (R-R interval).
- Divide 1500 by the number of small squares counted to obtain the heart rate in beats per minute (bpm).
For example, if there are 25 small squares between two R waves, you would calculate the heart rate as follows:
Heart Rate = 1500 / 25 = 60 bpm
This method assumes a constant time between beats and a standard EKG paper speed of 25 mm/s, with each small square representing 0.04 seconds.