What is Congestive heart failure (CHF)?

Congestive heart failure (CHF) is a state in which the heart's job as a pump is insufficient to distribute oxygen rich blood to the body. Congestive heart failure can be origin by:

• Diseases that grow weaker the heart muscle.
• Diseases that cause thicken of the heart muscles. 
• Diseases that increase oxygen require by the body tissue beyond the potential of the heart to deliver sufficient oxygen-rich blood.

Many diseases can impair the pumping action of the ventricles. For example, the muscles of the ventricles can be weakened by heart attacks, infections (myocarditis) or toxins (alcohol, some chemotherapy agents).