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An electrocardiogram (ECG) lead placement whereby the X+ lead is placed at the right mid-axillary line at the 4th intercostal space, X- at the left mid-axillary line at the 4th intercostal space, Y+ at the proximal left leg, Y- at the superior aspect of the manubrium, Z+ at the direct posterior to Z- and Z- at the 4th intercostal space at the left sternal margin.
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