Heart disease is the leading cause of death among men and women in the United States, killing nearly 700,000 people a year.

But studies have long shown that women are more likely than men to dismiss the warning signs of a heart attack, sometimes waiting hours or longer to call 911 or go to a hospital.

Now, researchers are trying to figure out why. They have found that women often hesitate to get help because they tend to have more subtle symptoms than men - but even when they…

Heart disease is the leading cause of death among men and women in the United States, killing nearly 700,000 people a year.

But studies have long shown that women are more likely than men to dismiss the warning signs of a heart attack, sometimes waiting hours or longer to call 911 or go to a hospital.

Now, researchers are trying to figure out why. They have found that women often hesitate to get help because they tend to have more subtle symptoms than men - but even when they…