Which is the recommended next step after a defibrillation attempt?

Start chest compressions. (Initiate Cardiopulmonary resuscitation.)

Defibrillation stops ventricular fibrillation an resumes normal heart rhythm by delivering electric shock to the chest. Cardiopulmonary resuscitation delays heart damage after patient's collapse. Both are a must within the first few minutes after cardiac arrest to maximize chance of survival.