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ECG Rates and Measurements

Do one of the following methods:

Count the number of QRS complexes within a 6-second strip and then multiply that number by 10.
Memorize the sequence, 300-100-150-75-60-50. Start with the first R wave that falls on a heavy line. Using the memorized sequence, count each subsequent heavy line until you come to the next R wave; this is the approximate rate (see below).
Divide the number of large boxes between 2 R waves into 300.
Divide the number of small boxes between 2 R waves into 1500.

Irregular rhythms should be counted for an entire minute.


ECG Rates and Measurements
Rates and Measurements

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