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|mainauthor= [[user:Drj|J.S.S.G. de Jong]] | |mainauthor= [[user:Drj|J.S.S.G. de Jong]] | ||
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==Lead reversals== | ==Lead reversals== | ||
[[Image:cableReversal1.png|thumb|Right and left arm lead reversal can be distinguished from the (much rarer) dextrocardia by looking at the | [[Image:cableReversal1.png|thumb|Right and left arm lead reversal can be distinguished from the (much rarer) dextrocardia by looking at the precordial R wave progression.]] | ||
[[Image:cableReversal2.png|thumb|Right arm and left leg lead reversal. Lead II now measures the signal between the left and right leg, which is remote from the heart.]] | [[Image:cableReversal2.png|thumb|Right arm and left leg lead reversal. Lead II now measures the signal between the left and right leg, which is remote from the heart.]] | ||
Sometimes an ECG is made properly. Mistakes do happen and leads can be switched. Always remain careful to check this or you might come to the wrong conclusions. One of the most common mistakes is to switch the right and left arm. This will result in negative complexes in I, indicating a right axis deviation! | Sometimes an ECG is made properly. Mistakes do happen and leads can be switched. Always remain careful to check this or you might come to the wrong conclusions. One of the most common mistakes is to switch the right and left arm. This will result in negative complexes in I, indicating a right axis deviation! | ||