In table Chartevents, there is a attribute named warning. What does it represent? for example if there is a data entry with ITEMID 220046 which represents Heart rate Alarm - High, what does warning value 1 means for that entry?

1 Answer 1


The chartevents table of MIMIC-III is populated with data that has been archived by Metavision ICU, a clinical information system that integrates charted data from various sources, for example heart rates from bedside monitors. Data from the bedside monitors must be validated by a caregiver in order for it to be stored as part of a patient record.

If a caregiver wishes to draw attention to a clinical event, he or she may label it with a 'warning'. Doing this makes the value or values appear in the patient chart in a bold red font. In the chartevents table, the warning is given the binary value of 1 to indicate a warning was logged. The following screenshot from a training video shows a warning being added against a heart rate of 140 beats per minute:

Metavision training video: adding a warning

After the warning has been added, the value now appears in a bold red font:

enter image description here

  • Thanks for the reply. So, is there any record about the sensor alarms in MIMIC III ? Jun 24, 2016 at 22:40

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