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Shock index (heart rate divided by systolic blood pressure) is easy to calculate and has been shown to correlate with outcomes in multiple conditions, including acute myocardial infarction and post-trauma critical bleeding (Medicine 2017; 96:e8014 and Emerg Med Australas 2014; 26:223).
To determine whether shock index is associated with hospital admission or inpatient mortality among undifferentiated adult emergency department (ED) patients, researchers retrospectively queried a national ED database to assess 568 million ED visits by undifferentiated adult patients.
Of these visits, 15.7% resulted in admission, and 2.6% resulted in death. A shock index higher than 1.3 was moderately predictive of hospitalization (likelihood ratio, 6.64) and m…