Getting an adequate night's sleep is one of the cornerstones of a healthy lifestyle. Of course, diet and regular exercise are important as well, but a lot of people underestimate how vital it is to get at least eight hours of sleep in every 24-hour period.

"Sleep is a period of regeneration and restoration for the body," said Emmanuella Auguste, M.D., MBA. "Any disruption to sleep affects the optimal functioning of the heart, increasing one's risk of negative cardiovascular outcomes."

When your heart is healthy

The primary function of the heart is pushing around 1.2 to 1.5 gallons of blood to all areas of your body, carrying oxygen, fuel, hormones and other compounds.

"Heart health is marked by the heart functioning at its best," Auguste said. "This entails proper circulation that allows perfusion throughout the tissues and organs in the body."

The blood the heart pumps around the body through the circulatory system of arteries and veins also acts as the vehicle to remove the waste products of metabolism.

"If the heart fails due to blockage or impaired functioning, all other organs are also negatively affected subsequently," Auguste added. "Overall, a healthy heart is central