The most common electrophysiologic mechanisms leading to SCD are tachyarrhythmias such as ventricular fibrillation (VF) or ventricular tachycardia (VT). Interruption of tachyarrhythmias, using either an automatic external defibrillator (AED) or an implantable cardioverter defibrillator (ICD), has been shown to be an effective treatment for VF and VT. The implantable defibrillator has become the central therapeutic factor in the prevention and treatment of sudden cardiac death. Patients with tachyarrhythmias, especially VT, carry the best overall prognosis among patients with sudden cardiac arrest (SCA).
Medical attention must be administered as soon as possible after the victim collapses; the chances for survival decrease 10% with every minute you wait. The average SCA victim is middle-aged or elderly, although some victims are in their 30s or 40s. CPR: Immediate cardiopulmonary resuscitation (CPR) is critical to treating sudden cardiac arrest.
By maintaining a flow of oxygen-rich blood to the body's vital organs, CPR can provide a vital link until more advanced emergency care is available. Ongoing Research is being done at cardiac centres.