Variability in ICU treatment has been well documented. In contrast, I had understood that EMS resuscitated and transported everyone who was not obviously dead. But apparently there is variability even there. A new article in Resuscitation concludes: "The proportion of patients with OHCA who receive resuscitation attempts is variable across EMS agencies and is associated with EMS response interval, ALS unit availability and geographic region. On average, survival was higher among EMS agencies more likely to initiate resuscitation."