If you witness a cardiac arrest.here's what to do

1. Use the heel of your hand andinterlock the fingers of the otherhand on top

2. Place your hands in the centreof the person's chest

3. Press down hard and fast

4. Lompress to the rhythm ofStayin" Alive : 100 to 120 beatsper minute

5.Compressions should be about5 cm deep - the height of acredit card

6. Keep your elbows locked anduse upper body strength