Definition: A clad coin is one that has multiple layers of metal in it; most current U.S. clad coins consist of an inner core of copper, with outer layers of a silver-colored nickel-copper alloy. Examples of this type of clad coin are the U.S. Dime, Quarter, and Half Dollar.
âChronic Total Occlusion Intervention. Chronic total occlusion (CTO) is a complete blockage of a coronary artery that has been in place for 30 days or longer. CTOs are very common, occurring in 15 to 20 percent of patients with significant coronary artery disease. The condition can cause severe angina (chest pain) and lead to a lower quality of life.
Computed Tomography (CT) Description. Computed tomography (CT), sometimes called computerized tomography or computed axial tomography (CAT), is a noninvasive medical examination or procedure that uses specialized X-ray equipment to produce cross-sectional images of the body.