Congestive Heart Failure, also known as CHF, is a condition that obstructs blood from adequately flowing throughout the body. This happens when the arteries in your heart are too narrow, and it often goes along with high blood pressure that has gone untreated for too long, which has made the heart too weak or stiff to pump blood correctly.
It's not uncommon for Chronic Obstructive Pulmonary Disease (COPD) and CHF to occur together, since the pulmonary and cardiovascular systems are so dependent on one another. If you have either one of these diseases, or both, you'll have a hard time getting enough oxygen into your bloodstream, and to the different parts of your body.
COPD has also been known to have a weakening effect on the heart because your heart needs the right amount of oxygen-rich blood flowing through it at all times.