On 9/11 (September 11, 2001), the US public experienced a terrorist event of extraordinary scope and traumatic impact. Studies have documented substantial short-term psychological response to 9/11,
1-4 but its effect on physical health has received limited attention.
5 Extremely stressful events may precipitate biological processes that increase one's risk of developing cardiovascular ailments.
6-11 Indeed, during the weeks following 9/11, rates of cardiovascular events increased significantly in New York City and surrounding areas.
12-14 Comparable findings were reported in Florida,
15 suggesting the possibility that direct exposure may not have been necessary for the development of 9/11 stress-related health problems. These provocative findings imply that, for some individuals, indirect exposure to extreme stress may produce physiologic responses that contribute to cardiovascular ailments.