Find the p wave on the ekg strip. The first line should be near the left hand side of the paper containing the ecg trace.
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Count the number of blocks between the rate that you want to determine.
How to measure ekg strips. In this example the heart rate is 60bpm as there are 6 r s found inside the 3 lines. Remember each box represents 0 04 seconds. Look at your patient.
Here are some simple steps on how to measure the pr interval. How many seconds is an ekg strip. That would provide a result of the heart rate.
Each small box is 0 04 seconds and each large box is 0 20 seconds. Most ekg strips are 6 seconds the graph paper has a marking on the top or bottom to indicate every 3 seconds. When you measure the qrs complex you start by measuring at the end of the pr interval to the end of s wave.
We would know that an ekg result has a 6 second strip when there are 3 lines on the top present in the strip. Find the qrs on the ekg strip. Determine where the pr interval is and to do this you start measuring at the beginning of the p wave until the beginning of the qrs complex.
Draw two lines on the ecg trace. How to measure an ekg strip. Yes this is a repeat but it is an important repetition.
A favorite ekg interpretation resource is ecg interpretation made incredibly easy. 30 large squares on an ecg trace represents exactly 6 seconds. To determine the number of ventricular contraction multiply the number of r waves in the 6 second ekg strip by 10.
Here are some simple steps on how to measure the qrs complex. Count the small boxes between there measurements. There are 5 small boxes in a large box 0 04 x 5 0 20 seconds.
A normal qrs complex measures 0 06 to 0 12 seconds which is 1 5 to 3 small boxes on the ekg strip. The second line should be exactly 30 large squares subsequent to the first line. Steps on how to measure the qrs complex.
Attain a 6 second ekg strip 30 large boxes and multiply the number of p waves in the six second strip by 10 to determine the number of atrial beats in one minute. Looking at the image above just count the r s inside the 3 lines and multiply it by 10.