Phase shift in transmitted electrocardiograms: a cautionary tale of distorted signals.
review · Level V
Where this comes from
- Record sourced from PubMed, PMID 19473742.
- Also identified by DOI 10.1016/j.resuscitation.2009.04.026.
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Abstract
We describe how a routine manufacturer's upgrade of equipment designed to record and transmit electrocardiograms inadvertently introduced the potential for artefact that simulated the ST segment elevation of myocardial infarction. Whilst this type of artefact from a phenomenon known as phase shift is likely to be rare, the possibility should be recognised. Any doubt about the veracity of ST segment elevation from this phenomenon can be tested by introducing test signals from a simple pulse generator.
Medical subject headings
- Artifacts
- Diagnostic Errors
- Electrocardiography
- Myocardial Infarction
- Telemetry