Heart Failure is a disease in which the heart cannot efficiently pump blood into the lungs and other tissues. Therefore, the oxygen necessary for the normal functioning of the body is not obtained. In heart failure, the most frequent signs and symptoms can be: fluid retention in the legs and feet, and breathlessness. The heart fails to pump blood to the whole body, causing a drop in blood pressure, lowering the blood supply of vital organs, and losing strength and weight. There are many causes of heart failure, within which are coronary artery disease, heart valve diseases, hypertension and diabetes.