In one study of over 13,000 patients with cardiac arrest, survival was as high as 35% in patients with one of the "shockable" rhythms, and less than 2% in patients with a non-shockable rhythm.

Table 3 describes the outcomes categorised by shockable or non-shockable rhythm on arrival of the EMS. The largest proportion of survivors to hospital arose from the A-CPR group who presented with ...

"Neuroprotective CPR can be viewed as the AED equivalent for non-shockable OHCA cases, but even better," reported Paul E. Pepe, MD, MPH, adjunct at of the University of Texas Health Science Center ...

The first recorded heart rhythms were characterized as shockable (ventricular fibrillation or pulseless ventricular tachycardia) or non-shockable (pulseless electrical activity or asystole).