Even if you follow a healthy lifestyle, there's a good chance you have at least an early stage of coronary artery disease (CAD), the most common type of heart disease. CAD typically begins with a buildup of fatty plaque in the coronary arteries, the blood vessels that supply blood and oxygen to the heart. This substance is known as "soft plaque," meaning it has not yet become hardened by calcium deposits (andamp;ldquo;hard plaque"). Soft plaque is potentially more dangerous than hard plaque as