An AED (Automatic External Defibrillator) is a small, portable, electronic device [show me] which uses sophisticated electronics to diagnose and analyze a victim's cardiac arrhythmias of ventricular fibrillation and ventricular tachycardia, determine whether defibrillation is required, and - if necessary - administer an electric shock to the heart, allowing the heart to re-establish an effective rhythm.

Originally designed for use by non-medical personnel such as officers of the peace, fire fighters, flight attendants, and other lay rescuers with proper training, there is a growing availability of AED's in public places such as schools, airports, libraries, health clubs, and even restaurants and cafes. In order to make public AED's easily accesible and immediately visible they are typically installed in large common areas and are accompanied by a bright sign [show me].

Although research has shown AED's to be approximately 95% accurate - that is the nearly unerring ability to properly assess the need for defibrillation - and most employ multiple safeguards to protect both the victim and the rescuer, fundamental training, including safety and maintenance, is crucial for effective use.

Unlike defibrillators used in emergency rooms, an automated external defibrillator requires very little training to use. And while functionality and features vary slightly from model to model, most AED's microprocessors are almost fool-proof as they guide the operator through each step with audible and visual prompts.

Once turned on the AED will instruct the operator to connect the electrodes (pads) to the victim. These pads allow the AED to examine the electrical output from the victim's heart and determine if a shock is required. It's critical that once the pads are attached the victim is not touched by another person as this may cause the AED to produce inaccurate readings. If the a shock is warranted, the AED will automatically charge and prepare to deliver the shock.

Before delivering the shock the AED will instruct the operator to ensure that no one is touching the victim to avoid the possibility of accidental injury to another person. After delivering the shock most AED's will again analyze the victim and will either administer another shock or instruct the operator to perform CPR.

Remember, early CPR is an integral part of providing lifesaving aid to a victim of sudden cardiac arrest. The skills learned in the CPR portion of this course will help to circulate oxygenated blood to the victim's brain until EMS arrives.

Using AED

• establish that the victim is experiencing SCA (sudden cardiac arrest)
• immediately dial 9-1-1 and provide the operator with all essential information
• retrieve AED and position it near the victim [show me]
• attach electrode(s) to the victim as indicated on the diagram [show me]
• follow AED prompts and directions [show me]