When should you deliver a shock from the aed?

Deliver a shock from the automated external defibrillator (AED) in these cases:

- The AED analyzes the heart rhythm and advises you to deliver a shock.

- The heart rhythm is ventricular fibrillation (VF) or ventricular tachycardia (VT) with a pulse.

Never deliver a shock during or immediately after:

- CPR compressions.

- Chest rubbing or other movement of the casualty.

- The AED is analyzing a heart rhythm.

- Anyone touches the or is in contact with the casualty.