Heart failure is a medical condition in which the heart is unable to pump enough blood to the rest of the body. While less severe cases of congestive heart failure can be managed through a variety of medical interventions, the condition can be fatal. There are many causes of congestive heart failure, the most common of which include high blood pressure, the presence of heart disease, obesity, diabetes and prolonged tobacco use. Individuals with obstructive sleep apnea are also at elevated risk for congestive heart failure. Symptoms include asthma attack-like wheezing and difficulty breathing, confusion, disorientation, dizziness and coolness of the extremities. Immediate medical attention must be sought if congestive heart failure is suspected.