The single rescuer with an AED should verify unresponsiveness, open the airway (a),give two respirations(b,) and check the pulse(c). If full cardiac arrest is confirmed, the rescuer should attach the AED and proceed with algorithm.

If "NO SHOCK INDICATED" appears, check pulse, repeat 1 minute CPR, then reanalyze. After three "NO SHOCK INDICATED" messages are received, repeat analyze period every 1-2 minutes.

Pulse check not required after shocks 1,2,4 and 5 unless "NO SHOCK INDICATED" message appears.

If Ventricular Fibrillation recurs after transiently converting (rather than persist without ever converting), restart the treatment algorithm from the top.

In the unlikely event that ventricular fibrillation persists after nine shocks, then repeat sets of three stacked shocks, with 1minute of CPR between each set.