The warning signs of heart attack might seem obvious, but the National Heart, Lung, and Blood Institute says many people take a “wait-and-see” attitude when they experience heart attack symptoms. Waiting two hours or more can mean death or permanent damage to the heart.

Despite the popular image of a heart attack - someone suddenly clutching his or her chest and falling over - most heart attacks begin slowly, as mild pain or discomfort in the chest.

According to the American Heart Association, the most common warning signs of a heart attack include: chest discomfort; discomfort in other upper body areas, such as one or both arms, back, neck, jaw or stomach; shortness of breath; breaking out in a cold sweat; nausea; or lightheadedness.

If you experience these symptoms, seek medical help immediately.