It was reported that this patient presented to the emergency room after experiencing cardiac arrest due to ventricular fibrillation (vf).The patient stated he did not receive a shock for the event and suspects a product performance issue with his device.Review of prior events show there has been no prior therapy delivered and no non-sustained events; however, there are many recorded events in the monitor only zone.A boston scientific technical services consultant stated that since there were no events with therapy at the time of the arrest, the device did not deliver therapy.The consultant suggested printing the logbook report as it will show everything currently in the device memory.The caller noted that the monitor only zone is programmed to 150 bpm and vt zone is programmed to 200bpm.Therefore, if the arrhythmias occurred at rates less than 200, the device would not have treated per programming.Efforts to obtain additional complaint details were unsuccessful.No additional adverse patient effects were reported.
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