[SamIam]

Hmmm. Never knew that.

From the NIH:

Research by the National Institutes of Health (NIH) indicates that women often experience new or different physical symptoms as long as a month or more before experiencing heart attacks.
Among the 515 women studied, 95-percent said they knew their symptoms were new or different a month or more before experiencing their heart attack, or Acute Myocardial Infarction (AMI). The symptoms most commonly reported were unusual fatigue (70.6-percent), sleep disturbance (47.8-percent), and shortness of breath (42.1-percent).

Surprisingly, fewer than 30% reported having chest pain or discomfort prior to their heart attacks, and 43% reported have no chest pain during any phase of the attack. Most doctors, however, continue to consider chest pain as the most important heart attack symptom in both women and men.

http://usgovinfo.about.com/cs/health.../womensami.htm