You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly between the second and third bold line on the ECG paper. This patient's heart rate is approximately______ beats per minute.

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Using the 300, 150, 100, 75, 60, 50 method, if the R-R interval spans between the second and third bold lines, the heart rate is approximately 100 to 75 beats per minute. Since it's directly in the middle, the closest estimate is 125 beats per minute.

You Are Using the 300, 150, 100, 75, 60, 50