The heart is a hollow muscle that pumps blood throughout the body day in and day out, resting only between beats. It's two main jobs are supplying blood to your body and to itself.
Heart failure occurs when the hearts pumping power is reduced.
In heart failure there is less oxygen delivered to the body so energy levels decrease. Fluid build-up results from decreased blood flow to the kidneys so people with heart failure may gain weight because of retaining extra fluid. Heart failure doesn't develop overnight, it starts gradually. A few other risk factors also increase your likelihood of getting coronary heart disease. Although these are signs of heart failure, they may also be caused by other medical problems.