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