Heart disease is the leading cause of death in Australia, causing nearly 15 per cent of all deaths in 2011. Food is directly involved in many of the risk factors for coronary heart disease. Paying attention to what you eat is one of the most important preventative measures you can take. Coronary heart disease is characterized by a narrowing of the arteries (atherosclerosis). Fatty deposits, or plaques, cling to the artery walls and can clog the arteries, making it more likely that a blood clot will form. A heart attack occurs when a blood clot blocks one of the arteries of the heart. This prevents the flow of blood, cuts off the oxygen supply to the heart and damages or kills the heart cells.