Technical Problems: Difference between revisions

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* '''Arm - foot switches''' lead to a very small or 'far field' signal in leads II or III.
* '''Arm - foot switches''' lead to a very small or 'far field' signal in leads II or III.
* '''Chest lead reversal''' lead to inappropiate R wave progression (increase - decrease - increase) and are often easily recognized.
* '''Chest lead reversal''' lead to inappropiate R wave progression (increase - decrease - increase) and are often easily recognized.
Therefore '''any right axis or small signal in an extremity lead''' should be reason enough to check lead positioning. A previous ECG can be very helpful.
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