Heart disease is the leading cause of death in the U.S. But symptoms of the disease – and of heart attacks – can differ between men and women. Women are more likely than men to experience a “silent” heart attack – one with no overt symptoms -- at most, maybe indigestion, nausea, back or neck pain. Research has shown that women are less likely to survive heart attacks than men. According to a new study, that could be because of the gender of the doctors who treat them.