It was reported that the patient presented to the hospital due to a low underlying rhythm.The device could not be interrogated, and premature end of life with a loss of output was suspected.The device was explanted and replaced and the patient was stable.Following procedure, it was noted that the can appeared to be inflated above the battery side.
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Premature battery depletion was confirmed by analysis.Bench testing on the device was performed, and no sources of high current were noted.In further analysis of the battery, lithium clusters were observed, but at the time of analysis the clusters did not appear to be in a location or size that would be sufficient to cause an internal short of the battery.As a result, the cause of the premature battery depletion could not be conclusively determined.However, from these analyses, in the absence of other root causes, it is probable that the premature battery depletion was caused by a lithium cluster induced short circuit.
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