During cardiac arrest, defibrillator did not deliver a shock as expected.Staff had stopped cpr ready to shock initially and the defibrillator made the expected noise as it was cycling and then stopped.Cpr restarted.Provider took over and switched the defibrillator to manual and again stopped cpr and initiated shock with same results.He checked all cables, connections and pushed the left side cable into the front of the machine and the shock was successful on the third try.Pt was not connected to the defib ekg cables.Pt was subsequently shocked two more times (with immediate return of cpr compression and ventilation in interim), all with provider pushing in on the left side cable.All attempts at resuscitation were unsuccessful.Patient arrived at ed at 02:50.Pt unresponsive at 03:07.First shock of 200 joules successfully delivered at 03:11.Second shock of 200 joules at 03:12.Final shock of 300 joules at 03:15.Cpr continued until 03:30.Patient expired.Fda safety report id# (b)(4).
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