If your heart failure is caused by coronary heart disease, one or more of your coronary arteries (arteries that supply blood to your heart muscle) have narrowed due to the build-up of a cholesterol containing mass (plaque) inside the artery wall. This narrowing of your artery reduces the amount of oxygen and nourishment that is able to reach your heart muscle, causing angina (chest pain) often during exercise. This lack of oxygen and nutrients makes the muscle work harder in order to pump blood around your body. Coronary artery disease can be delayed, and even prevented, by lifestyle and medical approaches. If you have this condition, you should discuss any changes you could make to your lifestyle with your doctor and how he/she can help you to prevent any further damage, slow the build-up of plaque in the arteries, and prevent progression of your heart failure

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