The device was not returned for evaluation.The customer requested information on ecg monitoring behavior: whether providing waveforms on an expired patient is normal, a pea for example.Pulseless electrical activity (pea), also known as electromechanical dissociation, refers to cardiac arrest in which the electrocardiogram shows a heart rhythm that should produce a pulse, but does not.The customer was advised it could possibly have been a pea rhythm.Strips from the device was reviewed and was said to show a normal rhythm with periods of inop (leads off), then a period during which the device is trying to learn (the rhythm).During the learn period, the waveform is still reasonably good.No additional information was provided.The cause of the event remains unknown.The device remains at the customer site.If the device is returned for evaluation or additional information is received, the complaint will be reopened for investigation.
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