The patient was admitted to the emergency room on (b)(6) 2021 after an attempted suicide and gunshot wound to the implanted pacemaker.The pacemaker went into back-up vvi (bvvi) mode and the patient felt phrenic nerve stimulation.Then, on (b)(6) 2021, the device was explanted after it was unable to be interrogated.It is unknown if the pacemaker could not be interrogated due to gunshot wound or not.Further information was requested but not received.
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The reported events of no pacing and failure to interrogate were confirmed.The device was received from the field with no output, no telemetry, and battery having reached end of service.Field information indicates the pacer tripped to backup mode due to a gunshot triggered by the patient causing a large dent on the device.The device image could not be saved due to lack of telemetry and data was requested to the field, but it could not be obtained.Analysis performed after cutting open the device case and replacing the power source indicated high current drained by the hybrid circuitry.Further analysis isolated the high current to a component on the hybrid circuitry, which depleted the battery prematurely, consistent with the reported field events.
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