CPR guidelines update means 'no more kissing'
4 January 2012 Last updated at 02:26 GMT
Ellen Mason, a senior cardiac nurse with the British Heart Foundation, shows how to perform cardio-pulmonary resuscitation (CPR).
She demonstrates chest compressions, shows how to hold your hands, how deep to press, and how often.
She also explains why the organisation believes you can save a life without using "mouth-to-mouth".