Medtronic PROTECTA XT DR D314DRG, Clinician Manual

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9.6.2.5 Device operation after an atrial cardioversion therapy
After an atrial cardioversion therapy is delivered, the device monitors for the end of the
episode or redetection of the episode. Immediately after delivering a cardioversion therapy,
the device starts a post-shock blanking period of 520 ms.
After the post-shock blanking period, the device resumes bradycardia pacing. If the
programmed pacing mode is an MVP mode (AAIR<=>DDDR or AAI<=>DDD), the device
operates in DDDR or DDD mode for 1 min after a cardioversion therapy. In other cases, the
device operates in the programmed pacing mode. The pacing amplitude and pulse width
settings are controlled by Post Shock Pacing parameters. For more information, refer to
Section 7.16, “Increasing the pacing output after a high-voltage therapy”, page 276.
The device monitors the episode for an outcome of either termination or redetection as a
result of the therapy.
9.6.2.6 Device operation after an aborted atrial cardioversion therapy
After an atrial cardioversion therapy is aborted, the device reverts immediately to the
programmed bradycardia pacing settings, not the Post Shock Pacing parameters.
The device resumes monitoring for atrial tachyarrhythmias after the next paced or sensed
ventricular event. If the device redetects the AT/AF episode before the episode ends, it
attempts to synchronize and deliver the programmed therapy that was aborted. However,
if the episode ends, the device resumes normal detection.
Note: If the device aborts the cardioversion therapy leaving energy stored on the capacitors,
the delivered energy of the next high-voltage therapy may be higher than the programmed
value.
9.6.3 Programming considerations for atrial cardioversion
Warning: After an ischemic or cerebrovascular accident, disable atrial cardioversion
therapies until the patient has stabilized.
Caution: If the Active Can feature is not used, the device delivers defibrillation and
cardioversion therapies between the RV Coil (HVB) and SVC Coil (HVX) electrodes only.
To ensure that the device can deliver defibrillation and cardioversion therapies, make sure
a supplementary HVX electrode is implanted and connected to the device before
programming the Active Can/SVC Coil parameter to Can Off.
Active Can/SVC Coil – The programmed setting for the Active Can/SVC Coil parameter
applies to all features that deliver high-voltage shocks.
Medtronic PROTECTA™ XT DR D314DRG
Clinician Manual 411