Definition of Automated External Defibrillators

Many sudden cardiac incidents are related to ventricular fibrillation where a sudden spasm and arrhythmia occur in the lower chambers of the heart. Ventricular fibrillation occurs during a heart attack and an automated external defibrillator can shock the heart back into normal rhythm.

Equipment

• An automated external defibrillator (AED) is a portable device approximately the size of a textbook. The unit is battery powered and contains two adhesive sensors joined by power lines to the main unit. Once activated, the unit provides audible voice commands that talk the user through proper alignment of the sensors, power activation, and shock procedures if necessary.

Function

• Automated external defibrillators are designed on the same principle as the manual defibrillators found in hospitals. The sensors analyze heart rhythm to determine if a shock is necessary, and then administer the appropriate shock if needed.

Rationale

• Up to 50,000 cardiac arrest fatalities can be prevented with the assistance of an automated external defibrillator, according to the American Red Cross. The presence of an AED on-site reduces the amount of time necessary to restore normal heart function while waiting for medical assistance.

Prevalence

• Automated external defibrillators are becoming standard requirements in offices, department stores, schools, health and fitness facilities, hospitals, doctors' offices, and many other public venues. They can be purchased for the home as well.

Users

• Automated external defibrillators are best used by individuals certified in cardiopulmonary resuscitation (CPR) and AED use, but the audible voice commands from the unit can talk any individual through the process in an emergency situation.