While it’s well-known that issues like high blood pressure, diabetes, smoking and not enough exercise are risk factors for a heart attack, many people may not know the early signs to tell if a cardiac event is on its way. Experts say there are designated symptoms that happen in the days and weeks before a heart attack that can be a red flag.

Too many people still miss heart trouble Is your heart healthy? In a 2015 study published in JAMA, eight out of 10 men and women with scarring on their heart muscle—evidence of a previous heart attack—had no clue their heart had been in danger.