'CPR decisions must be clearer'
1 June 2012 Last updated at 08:18 BST
A third of cardiac arrests that happen in hospital could be prevented, according to a national study.
The confidential report also warns that in some cases cardiopulmonary resuscitation (CPR) is used when it's not wanted or not worth it.
It is calling for better assessment of patients when when they are first admitted to hospital, and a better response from staff when the condition of an acutely ill patient deteriorates further.
Report author Dr George Findlay explains his findings.