Technical Problems: Difference between revisions

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<div style="clear:both"></div>
<div style="clear:both"></div>
==Lead reversals==
==Lead reversals==
{{multiple image
| align    = right
| direction = vertical
| width    = 200
| image1    = E000566.jpg
| caption1  = A Normal ECG
| image2    = E000567.jpg
| caption2  = right arm - right leg reversal
| image3    = E000563.jpg
| caption3  = left arm - left leg reversal
| image4    = E000564.jpg
| caption4  = left leg - right leg reversal.
| image5    = E000568.jpg
| caption5  = v3 - v2 reversal
| image6    = E000565.jpg
| caption6  = left - right reversal
}}
Lead switches are a common mistake when ECGs are made and can lead to wrong diagnoses. Common mistakes are:
Lead switches are a common mistake when ECGs are made and can lead to wrong diagnoses. Common mistakes are:
* '''Left-right arm reversals''' lead to a negative complex in lead I with  a negative P wave in lead I. They are one of the most common causes of right axis deviation on the ECG!
* '''Left-right arm reversals''' lead to a negative complex in lead I with  a negative P wave in lead I. They are one of the most common causes of right axis deviation on the ECG!
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It is possible to distinguish lead reversal and [[w:Dextrocardia|dextrocardia]] by watching the precordial leads. Dextrocardia will not show any R wave progression in leads V1-V6, whereas lead reversal will.
It is possible to distinguish lead reversal and [[w:Dextrocardia|dextrocardia]] by watching the precordial leads. Dextrocardia will not show any R wave progression in leads V1-V6, whereas lead reversal will.
{{multiple image
| align    = right
| direction = horizontal
| width    = 200
| image1    = E000566.jpg
| caption1  = A Normal ECG
| image2    = E000567.jpg
| caption2  = right arm - right leg reversal
| image3    = E000563.jpg
| caption3  = left arm left leg reversal
| image4    = E000564.jpg
| caption4  = left leg right leg reversal.


| image5    = E000568.jpg
| caption5  = v3 v2 reversal
}}


{{clr}}
{{clr}}