Here is an extract from a medical textbook.

1. The patient should lie down and relax.

2. Calibrate the ECG machine - a standard signal of 1mV should move the stylus two large squares (1 cm) vertically.

3. Attach the limb leads: left arm (LA), right arm (RA), left leg (L),and right leg (RL).

4. Record the six standard leads:I, II II, augmented voltage right arm (AVR), augmented voltage left arm (AVL), and augmented voltage foot (AVF)-three or four complexes (see C below) for each.

5. Apply the electrode to the six chest positions in turn, recording three to four complexes of each. If the rhythm does not appear to be sinus (normal rhythm), a rhythm strip of 6-10 complexes in a single lead should be recorded.

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