During an in clinic follow-up, the device was interrogated and was unable to communicate.The electrocardiogram (ecg) only showed the patients rhythm, and no device pacing was observed.Premature depletion of the battery was suspected.Device replacement is anticipated.The patient was in stable condition.
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Premature battery depletion, no pacing output and communication failure was confirmed by analysis.The loss of communication and no pacing output was due to low battery voltage; the low battery voltage was a result of premature battery depletion.A device evaluation was performed, and no sources of high current were noted.The cause of the premature battery depletion was consistent with lithium clusters formation.From these analyses, in the absence of high current draw, it is probable that the premature battery depletion was caused by a lithium cluster induced short circuit.Lithium clusters are a known depletion mechanism for these advisory products that has been investigated and associated with a field action in october 2016.
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