Final answer:
To find the heart rate when looking at an EKG, measure the time between each QRS complex and divide 60 by that time.
Step-by-step explanation:
To find the heart rate when looking at an EKG, you need to measure the time between each QRS complex, which represents one heartbeat. The heart rate can then be calculated by dividing 60 (minutes) by the time between each QRS complex. For example, if the time between each QRS complex is 0.8 seconds, the heart rate would be 60 / 0.8 = 75 beats per minute.