The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone.
Heart disease describes a range of conditions that affect your heart. Diseases under the heart disease umbrella include blood vessel diseases, such as coronary artery disease; heart rhythm problems (arrhythmias); and heart defects you're born with (congenital heart defects), among others.
The term "heart disease" is often used interchangeably with the term "cardiovascular disease." Cardiovascular disease generally refers to conditions that involve narrowed or blocked blood vessels that can lead to a heart attack, chest pain (angina) or stroke. Other heart conditions, such as those that affect your heart's muscle, valves or rhythm, also are considered forms of heart disease.
Many forms of heart disease can be prevented or treated with healthy lifestyle choices.
Atherosclerosis is caused by correctable problems, such as an unhealthy diet, lack of exercise, being overweight and smoking.
Congenital heart defects usually develop while a baby is in the womb. Some medical conditions, medications and genes may play a role in causing heart defects.
Causes of cardiomyopathy