Anita Dunham's first heart attack started with a mysterious pain in her arm -- and, suddenly, the 34-year-old felt as if she couldn't breathe. After she got dressed, she could barely speak because the pain was so great in her arms and chest.
Dunham, who had a second heart attack in 2002, wore red Friday to spread awareness about heart disease. Now 64 years old, she said she wants women everywhere to know that heart disease, the No. 1 killer for women, can affect women in all walks of life. She and others shared their stories with CNN's iReport.com. Read more about Dunham
The National Heart Lung and Blood Institute, part of the National Institutes of Health, promoted the red clothing day to spread the message that "Heart Disease Doesn't Care What You Wear -- It's the #1 Killer of Women," according to its Web site. 
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CNN's Cristina Martin contributed to this report.
All About Heart Attacks
