An attempt is made to assess the value of a medically-staffed mobile intensive care unit which has functioned for 16 years at Holstebro Central Hospital. The medically-staffed ambulance responded to emergency calls concerning 2,048 patients. The average age was 56 years, 1,225 patients were men, 461 were women and in 362 cases the sex was not recorded. Of these 753 were non-cardiac cases, 883 were cardiac cases and in 412 cases, the diagnosis was not recorded. Resuscitation was commenced in 649 cases and this proved successful primarily in 175 cases (27%). Sixty-seven of these patients (38%) were discharged from hospital. In nine cases only defibrillation was performed while supplementary drugs were administered in 434 cases. Treatment consisted mainly of cardiovascular drugs, divretics, analgesics, intravenous fluid and in 518 cases intubation. The drug treatment required the presence of a doctor. The cost was modest, particularly as this arrangement has, hitherto, not required extra staffing. Improvements in the existing prehospital emergency treatment are proposed. In particular, the alarm system should be changed. A medically-staffed mobile intensive care arrangement will render commencement of thrombolytic treatment possible in cases of acute myocardial infarction as early as possible.