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Heart Rate

There are several methods for determining heart rate. Our first method is simple. Count the number of QRS complexes over a 6 second interval. Multiply by 10 to determine heart rate. This method works well for both regular and irregular rhythms. In the first image, we can count 7 QRS complexes, so the heart rate is 70.

The second method uses small boxes. Count the number of small boxes for a typical R-R interval. Divide this number into 1500 to determine heart rate. In the second image, the number of small boxes for the R-R interval is 21.5. The heart rate is 1500/21.5, which is 69.8.


Heart Rate illustration


Heart Rate illustration

Table of Contents

      Introduction
1EKG Paper
2EKG Nomenclature
3EKG Interpretation
4Rhythm
5Heart Rate
6P Wave
7PR Interval
8QRS Complex
9T Wave
10QT Interval
11ST Segment
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