A study of 23 hospitals in Australia to determine whether Medical Emergency Teams (MET) — also known as Rapid Response Teams — reduce the rate of cardiac arrests, unplanned admissions to intensive care units, and deaths. Eleven hospitals functioned as usual and 12 introduced a MET system. The authors concluded that, although the introduction of the MET system led to an increase in calls to the team, it did not substantially affect the incidence of cardiac arrest, unplanned ICU admissions, or unexpected death.