Heart attack patients to be given ‘cooling blankets’

The usual temperature of the human body is 37C (98.6F) but scientists believe that lowering it to 32-34C (89.6-93.2F) after a heart attack can prevent brain damage or death.

This is because it reduces the metabolism of brain cells, so slowing the rate at which they are damaged. Cooling may also slow the release of chemicals that can kill more brain cells.

Heart attack suffered are cooled, while unconscious, by being wrapped in a blanket or mattress filled with fluid or given a special cap to wear.

They can be kept cool for up to 24 hours and are given sedation as well as muscle relaxants to prevent shivering, before being warmed up gradually.