Cardiac arrests in firefighters

Cardiac arrests in firefighters Order Description Research to confirm that the main cause of death in US Firefighters is stress/overexertion/cardiac related and discover why this is (is it being out of shape; over-worked during shifts; cyanide exposure or other chemical exposure in smoke; etc.) Research what current policies or procedures are in place in more modern departments (Phoenix, Seattle, LA; Denver; etc.) to combat this, and put forth an opinion as to what can be done in the immediate future to reduce these risks.