According to a study published in the journal Circulation a common dietary fat called oleate that is present in olive oil may help restoration of metabolism that may get disturbed in case of heart failure. When the heart fails it's unable to carry out normal processes of using stored fats as fuel. These fats are normally stored as tiny droplets called lipid bodies in muscle cells of the heart. When the heart becomes unable to use these fats it causes the muscle to become starved of energy. Without fat metabolism by the heart muscle cells they break down into toxic