(b)(4).Physio-control reviewed the electronic patient record of the reported event.The shock advisory system renders a shock or no shock decision based upon analysis of a 3 rhythm segment voting scheme.During segment 1, of analysis 1, the patient was in an organized rhythm that resulted in a no shock vote.During segments 2 and 3, it appears that chest compressions were being performed, affecting the algorithmic interpretation of the rhythm.The cause of the reported issue was determined to be due to use error.The user failed to hold chest compressions during aed rhythm analysis in segments 2 and 3, and was therefore not following the operating instructions that state to stop cpr after the analyze button is pressed.Device not evaluated by manufacturer.
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