Ventricular Fibrillation (VF)

Ventricular fibrillation (VF) is a fast and chaotic heart rhythm that occurs in the lower chambers or ventricles. In VF, the heart loses its ability to pump effectively. This results in a drop of blood pressure and loss of consciousness.  If normal rhythm is not restored it will result in death. Sudden Cardiac Arrest (SCA (SCA) caused by ventricular fibrillation is responsible for half of all heart related deaths. Sometimes, a heart attack (blockage of the heart pipes/arteries) can lead to VF.

VF is sudden, happens without warning, and stops the heart from working.

SCA is caused by an electrical problem and although it can be triggered by a heart attack(myocardial infarction), a circulatory (plumbing) problem caused by clogged blood vessels that cut off the supply of blood to the heart, it is not the same as a heart attack



Bystander CPR can provide circulation and improve the survival rates in people with sudden cardiac death until defibrillation is performed to restore the normal rhythm. Patients at risk for ventricular fibrillation and survivors of sudden cardiac arrest can be treated with implantable cardiac defibrillators (ICDs) to provide life-saving prompt treatment.