The heart is a complex organ that pumps blood throughout the body. It sits in the chest, slightly left of center, behind the breastbone, and between the lungs. A heart that is not healthy does not ...

The primary responsibility of the heart is to pump blood throughout the circulatory system. As the center of the circulatory system, the heart is an essential organ for maintaining the overall ...

In adults, a typical resting heart rate is 60 to 100 beats per minute, but structural or electrical disorders of the heart can cause it to rise or fall. Medications, a lack of sleep, and stress may ...

When your heart is strong, it pumps blood throughout your body. But when you have heart failure, the muscles in your heart walls slowly weaken. Once they’re too weak, your heart can’t pump the blood ...

When you have heart failure, your heart may not be strong enough to pump out as much blood as your body needs. As it tries to move more blood, your heart gets larger. It also pumps faster, and your ...