Medtronic PROTECTA XT DR D314DRG, Clinician Manual

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Cardioversion and defibrillation are high-energy therapies that shorten battery longevity. An
excessive number of charging cycles also shortens battery longevity.
Charge Circuit Timeout or Charge Circuit Inactive – Contact a Medtronic representative
and replace the device immediately if the programmer displays a Charge Circuit Timeout
or Charge Circuit Inactive message. If this message is displayed, high-voltage therapies
are not available for the patient.
Concurrent pacemaker use – If a separate pacemaker is used concurrently with the ICD,
verify that the ICD does not sense the pacemaker output pulses because this can affect the
detection of tachyarrhythmias by the ICD. Program the pacemaker to deliver pacing pulses
at intervals longer than the ICD tachyarrhythmia detection intervals.
Device status indicators – If any of the device status indicators (for example, Electrical
Reset) are displayed on the programmer after interrogating the device, inform a Medtronic
representative immediately. If these device status indicators are displayed, therapies may
not be available to the patient.
Electrical reset – Electrical reset can be caused by exposure to temperatures below –18 °C
(0 °F) or strong electromagnetic fields. Advise patients to avoid strong electromagnetic
fields. Observe temperature storage limits to avoid exposure of the device to cold
temperatures. If a partial reset occurs, pacing resumes in the programmed mode with many
of the programmed settings retained. If a full reset occurs, the device operates in VVI mode
at 65 bpm. Electrical reset is indicated by a programmer warning message that is displayed
immediately upon interrogation. To restore the device to its previous operation, it must be
reprogrammed. Inform a Medtronic representative if your patient’s device has reset.
End of Service (EOS) indicator – Replace the device immediately if the programmer
displays an EOS indicator. The device may soon lose the ability to pace, sense, and deliver
therapy adequately.
Follow-up testing – Consider the following information when performing follow-up testing
of the device:
●
Keep external defibrillation equipment nearby for immediate use. Potentially harmful
spontaneous or induced tachyarrhythmias may occur during device testing.
●
Changes in the patient’s condition, drug regimen, and other factors may change the
defibrillation threshold (DFT), preventing the device from terminating the patient’s
tachyarrhythmias postoperatively. Successful termination of ventricular fibrillation or
ventricular tachycardia during the implant procedure is no assurance that
tachyarrhythmias can be terminated postoperatively.
Higher than programmed energy – The device may deliver a therapy of higher than
programmed energy if it was previously charged to a higher energy and that charge remains
on the capacitors.
Medtronic PROTECTA™ XT DR D314DRG
26 Clinician Manual