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*'''III''' from the left arm to the left leg | *'''III''' from the left arm to the left leg | ||
An easy rule to remember: lead '''I''' + lead '''III''' = lead '''II''' | An easy rule to remember: lead '''I''' + lead '''III''' = lead '''II''' | ||
This is doen with the use of the height or depth, independent of the wave (QRS, P of T). | |||
Example: if in lead I, the QrS complex is 3 mm in height and in lead III 9mm, the height of the QRS-complex in lead II is 12mm. | |||
Other exttremity leads are: | |||
*'''AVL''' | *'''AVL''' points to the left arm | ||
*'''AVR''' | *'''AVR''' points to the right arm | ||
*'''AVF''' | *'''AVF''' points to the feet | ||
The capital A stands for "augmented" and V for "voltage". | |||
(aVR + aVL + aVF = 0) | (aVR + aVL + aVF = 0) | ||
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**omkering van afleidingen aVR en aVF | **omkering van afleidingen aVR en aVF | ||
Men kan draadverwisseling en [[wikipedia:Dextrocardia| | Men kan draadverwisseling en [[wikipedia:Dextrocardia|dextrocardia]] van elkaar onderscheiden door eveneens naar de precordiale afleidingen te kijken. Dextrocardia toont R-golf inversie i.t.t. omkering van de electroden. | ||
==Disturbances== | ==Disturbances== |