Final answer:
To calculate the heart rate from an EKG tracing using the 6-second method, count the number of R-R intervals and multiply by 10 to get the heart rate in beats per minute.
Step-by-step explanation:
To calculate the heart rate from an EKG tracing using the 6-second method, you need to count the number of R-R intervals, which represents the time between two consecutive heartbeats. Then, you multiply that number by 10 to get the heart rate in beats per minute.
For example, if you count 8 R-R intervals in a 6-second period, you would multiply 8 by 10 to get a heart rate of 80 beats per minute.