Using the Automated External
Defibrillator (AED) to Treat
Ventricular Fibrillation.
Most sudden cardiac arrest victims are in
ventricular fibrillation
(VF). VF is an abnormal, chaotic heart rhythm that prevents the heart
from
pumping blood. VF causes more cardiac arrests than any other rhythm
(about
80% to 90% of cases). You mst defibrillate a victim immediately to stop
VF and allow a normal heart rhythm to resume. The faster a victim
receives defibrillation
with the AED, the better the victim's chances of survival.
If you provide defibrillation within the first 5
minutes of a cardiac arrest, the odds are about 50% that you can save
the victim's life. But with each passing minute during a cardiac
arrest, the chance of successful resuscitation is reduced by 7% to 10%.
After 10 minutes there is very little chance of successful rescue.