But much of the difference in heart attack rate before and after Katrina is due to psychosocial risk factors, rather than basic physiological risk factors, say the researchers who studied the phenomenon.

FORBES: How Major Psychological Stressors Can Lead To Serious Health Problems

But the report found that while aspirin may slow changes in cognitive ability in women at high risk of a heart attack or stroke, it made no difference to the rate at which the women developed dementia - which was also examined for by a neuropsychiatrist.

BBC: Aspirin may 'slow elderly brain decline', study finds