Over the past six decades, mortality due solely to anaesthesia
has decreased from approximately 1 in 1,500 to 1 in 150,000.
However, death within 30 days of surgery remains a major issue.
In the United Kingdom, over the past ten years, the number of such
perioperative deaths has remained fairly constant at approximately
20,000 deaths per annum
, of which 9,000 are due to cardiac