electromagnetic interference
External electromagnetic fields that can disrupt cardiac device function, requiring specific design considerations and patient warnings.
Full Definition
Electromagnetic interference (EMI) refers to electromagnetic fields from external sources that can potentially affect cardiac device operation. Common sources include MRI scanners, welding equipment, electronic security systems, and certain medical procedures. EMI can cause inappropriate device responses such as pacing inhibition, inappropriate shocks, or mode switching. Cardiac device manufacturers must demonstrate EMI immunity through rigorous testing, and patients receive specific guidelines about avoiding or safely using electromagnetic devices and environments.
Usage
Usage note: Can be abbreviated as EMI after first use in technical documents.
In Context
- "The device demonstrated robust electromagnetic interference immunity during airport security screening tests." — Safety testing report
- "Patients should be counseled about potential electromagnetic interference from household appliances." — Patient education material