Q: I'll know I'm having a heart attack because my chest and arm will hurt, right?

A: Not necessarily. While some heart attacks do feature classic symptoms like chest and arm pain, the idea that they all do is FALSE.

About 25% of men and 40% of women don't have chest pain during heart attacks, says Harmony Reynolds, MD, associate director of the Cardiovascular Clinical Research Center and assistant professor of medicine at NYU Langone Medical Center.

With or without chest and arm pain, women may have "shortness of breath, fatigue, nausea, vomiting, sweating, palpitations, dizziness, loss of appetite, or pain in other areas such as the jaw, throat, neck, shoulders, or upper or middle back," Reynolds says.