Congestive Heart Failure
Congestive Heart Failure Overview
The heart is fundamentally a blood pump. It pumps blood from the right side of the heart to the lungs to pick up oxygen. The oxygenated blood returns to the left side of the heart. The left side of the heart then pumps blood into the circulatory system of blood vessels that carry blood throughout the body.
The heart consists of four chambers.
Heart failure sounds frightening because it sounds like the heart just stops working. Do not be discouraged by the term heart failure. Heart failure means the tissues of the body are temporarily not receiving as much blood and oxygen as needed. With advancements in diagnosis and therapy for heart failure, patients are feeling better and living longer.
Heart failure is an illness in which the pumping action of the heart becomes less and less powerful. When this happens, blood does not move efficiently through the circulatory system and starts to back up, increasing the pressure in the blood vessels and forcing fluid from the blood vessels into body tissues. Symptoms depend on which area of the body is most involved in the reduced pumping action.
Although heart failure is a serious medical condition, there are many causes and the outcome can vary from person to person. Heart failure may develop gradually over several years, or more quickly after a heart attack or a disease of the heart muscle. Congestive heart failure (CHF) is generally classified as systolic or diastolic heart failure and becomes progressively more common with increasing age. In addition, patients with risk factors for heart disease are more likely to develop congestive heart failure.
Terrence X O'Brien, MD, FACC
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Heart failure is the pathophysiologic state in which the heart, via an abnormality of cardiac function (detectable or not), fails to pump blood at a rate commensurate with the requirements of the metabolizing tissues and/or pumps only from an abnormally elevated diastolic filling pressure.