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The ECG Tracings are seen on paper. The time intervals are shown as well as the measurements of each block on the paper.
The ECG paper records time sequences (horizontal deflections) and amplitude (vertical deflections) of the electrical activity of the heart. The horizontal lines measure time intervals and heart rate.
You will see first the P wave, the QRS complex, and the T wave. The P wave is the atria contracting, the QRS is the ventricle contacting, and the T wave is the relaxation of the ventricles.
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