Heart disease is the leading cause of death in the United States, killing more than 600,000 people each year. Coronary artery disease (CAD) is the most common type of heart disease in the United States, affecting 16.5 million Americans. Over time, CAD can weaken the heart muscle and may lead to heart failure or arrhythmias. Risk factors for coronary artery disease are high LDL cholesterol, low HDL cholesterol, high blood pressure, family history, diabetes, smoking, obesity, and increased age. A recent large, international study found that …