Heart Disease

 is a hero trait.

Mechanics
The hero's randomly determined lifespan is 75% of normal. The mean lifespan for heroes is 65 years, so the mean lifespan for heroes with this trait is 48.75 years.

This stacks through multiplication with other lifespan modifiers. For example, Health-Conscious and Heart Disease together work out to a lifespan 93.75% of normal, bringing the mean lifespan to about 61 years.

Resurrected heroes will not have their lifespan reduced below 100% of their randomly-selected lifespan, so this trait will only affect them if they have positive lifespan modifiers.