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Stratos LV/LV-T Technical Manual 13
1.5.6 Electromagnetic Interference (EMI)
The operation of any implanted device may be affected by
certain environmental sources generating signals that resemble
cardiac activity. This may result in inhibition of pacing and/or
triggering or in asynchronous pacing depending on the pacing
mode and the interference pattern. In some cases (i.e.,
diagnostic or therapeutic medical procedures), the interference
sources may couple sufficient energy into a pacing system to
damage the device and/or cardiac tissue adjacent to the leads.
BIOTRONIK CRT-Ps have been designed to significantly reduce
susceptibility to electromagnetic interference (EMI). However,
due to the variety and complexity of sources creating
interference, there is no absolute protection against EMI.
Generally, it is assumed that EMI produces only minor effects, if
any, in CRT-P patients. If the patient may be exposed to one of
the following environmental conditions, then the patient should
be given the appropriate warnings.
1.5.7 Home and Occupational Environments
The following equipment (and similar devices) may affect normal
CRT-P operation: electric arc welders, electric melting furnaces,
radio/television and radar transmitters, power-generating
facilities, high-voltage transmission lines, electrical ignition
systems (also of gasoline-powered devices) if protective hoods,
shrouds, etc., are removed, electrical tools, anti-theft devices at
retail stores and electrical appliances, if not in proper condition
or not correctly grounded and encased.
Patients should exercise reasonable caution in avoidance of
devices which generate a strong electric or magnetic field. If
EMI inhibits pacing or causes a reversion to asynchronous
pacing or pacing at magnet rate, moving away from the source
or turning it off should allow the CRT-P to return to its normal
mode of operation. Some potential EMI sources include:
High Voltage Power Transmission Lines – High voltage power
transmission lines may generate enough EMI to interfere with
CRT-P operation if approached too closely.