Heart disease refers to several conditions of the heart. The most common type of heart disease, coronary artery disease can lead to heart attack, heart failure, angina, and arrhythmias.

Coronary artery disease is caused by a buildup of plaque (cholesterol deposits) in the arteries that supply blood to the heart. When plaque accumulates in the arteries, the arteries narrow, preventing the heart muscle from getting enough blood. A heart attack occurs when an artery is entirely blocked by plaque or if plaque breaks off and clogs a coronary artery.

Obesity is one lifestyle factor that has been directly linked heart disease as it causes increased LDL (bad) cholesterol levels, reduced HDL (good cholesterol), high blood pressure and diabetes. By losing weight and addressing cholesterol, blood pressure and diabetes, one can reduce his or her risk for heart disease.