Heart disease is the leading cause of death in the U.S. — but it doesn't have to be that way. There are lots of simple, small changes you can make to show your heart a little more love. And you can start right here.

Click on the flashing dots below to see what really happens to your body when you have a heart attack, and keep scrolling for nutrition, fitness and lifestyle tips for a healthier heart, plus guides to healthy cholesterol and blood pressure at any age.