From Robert Longley,
Your Guide to U.S. Gov Info

Symptoms may appear up to a month before attack
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).

Many women never had chest pains
Surprisingly, fewer than 30% reported having ches...