Call 000 immediately: Put the phone on speaker mode so the call-taker can guide you through compressions while emergency crews are dispatched. Do not delay over clothing: Effective chest compressions can be started directly over light clothing. Do not waste time attempting to remove a bra or shirt to begin compressions. Remove clothing only for an AED: If an Automated External Defibrillator (AED) arrives, cut or remove clothing and the bra only as needed to place the adhesive pads directly on bare skin. Correct hand placement: Place the heel of your hand on the centre of the chest (the lower half of the breastbone), exactly as you would for a male patient.