Jul 1, 1997

Unwitnessed out-of-hospital cardiac arrest: is resuscitation worthwhile?

Annals of Emergency Medicine
M Kuisma, K Jaara


To determine the epidemiology of unwitnessed out-of-hospital cardiac arrest and the factors associated with survival after resuscitation using the Utstein style data collection. We conducted a prospective cohort study in a 525,000-population city served by a single EMS system comprising a tiered response with physicians in the field. We studied consecutive unwitnessed out-of-hospital cardiac arrests that occurred between January 1, 1994, and December 31, 1995. We determined survival from cardiac arrest to discharge from hospital and the factors associated with survival. Of the 809 patients for whom resuscitation was considered, 205 (25.3%) had sustained unwitnessed arrests. Cardiac origin of arrest was verified in 52% of cases. The most common noncardiac causes of arrest were trauma, intoxication, near-drowning, and hanging. In 150 patients (73.2%) the presenting rhythm was asystole, in 28 (13.6%) it was pulseless electrical activity, and in 27 (13.2%) it was ventricular fibrillation. Resuscitation was attempted in 162 cases, 59 (36.4%) of whom demonstrated return of spontaneous circulation; 45 (27.8%) were hospitalized alive, and 8 (4.9%) were discharged. The survivors represented 6.7% of all out-of-hospital cardiac arrest sur...Continue Reading

  • References9
  • Citations28


Mentioned in this Paper

Ventricular Fibrillation
Logistic Regression
Basic Cardiac Life Support
Cell Differentiation Process
Near Drowning
EMS System
Electromechanical Dissociation
Out-of-Hospital Cardiac Arrest

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