Tetralogy of Fallot

Important
It is possible that the main title of the report Tetralogy of Fallot is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.

Synonyms

Fallot's Tetralogy
Pulmonic Stenosis-Ventricular Septal Defect

Disorder Subdivisions

None

General Discussion

Tetralogy of Fallot is the most common form of cyanotic congenital heart disease. Cyanosis is the abnormal bluish discoloration of the skin that occurs because of low levels of circulating oxygen in the blood. Tetralogy of Fallot consists of the combination of four different heart defects: a ventricular septal defect (VSD); obstructed outflow of blood from the right ventricle to the lungs (pulmonary stenosis); a displaced aorta, which causes blood to flow into the aorta from both the right and left ventricles (dextroposition or overriding aorta); and abnormal enlargement of the right ventricle (right ventricular hypertrophy). The severity of the symptoms is related to the degree of blood flow obstruction from the right ventricle.

The normal heart has four chambers. The two upper chambers, known as atria, are separated from each other by a fibrous partition known as the atrial septum. The two lower chambers are known as ventricles and are separated from each other by the ventricular septum. Valves connect the atria (left and right) to their respective ventricles. The valves allow for blood to be pumped through the chambers. Blood travels from the right ventricle through the pulmonary artery to the lungs where it receives oxygen. The blood returns to the heart through pulmonary veins and enters the left ventricle. The left ventricle sends the now oxygen-filled blood into the main artery of the body (aorta). The aorta sends the blood throughout the body.

If infants with tetralogy of Fallot are not treated, the symptoms usually become progressively more severe. Blood flow to the lungs may be further decreased and severe cyanosis may cause life-threatening complications. The exact cause of tetralogy of Fallot is not known.
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Resources

American Heart Association
National Center
7272 Greenville Avenue
Dallas, TX 75231-4596
Tel: (214)373-6300
Fax: (214)373-0268
Tel: (800)242-8721
Email: inquire@heart.org
Internet: http://www.americanheart.org

Congenital Heart Anomalies, Support, Education, & Resources
2112 North Wilkins Road
Swanton, OH 43558
Tel: (419)825-5575
Fax: (419)825-2880
Email: chaser@compuserve.com
Internet: http://www.csun.edu/~hcmth011/chaser/chaser-news.html

NIH/National Heart, Lung and Blood Institute Information Center
P.O. Box 30105
Bethesda, MD 20824-0105
Tel: (301)592-8573
Fax: (301)251-1223
Email: nhlbiinfo@rover.nhlbi.nih.gov

Adult Congenital Heart Association
6757 Greene Street
Philadelphia, PA 19119
USA
Tel: 2158491260
Fax: 2158491261
Email: info@achaheart.org
Internet: http://www.achaheart.org/

Kids With Heart National Association for Children's Heart Disorders, Inc.
1578 Careful Dr
Green Bay, WI 54304-2941
Tel: (920)498-0058
Fax: (920)498-0058
Tel: (800)538-5390
Email: kidswithheart@greenbaynet.com
Internet: http://www.kidswithheart.org

Little Hearts, Inc.
P.O. Box 171
Cromwell, CT 06416
USA
Tel: 8606350006
Fax: 8606350006
Tel: 8664354673
Email: info@littlehearts.org
Internet: http://www.littlehearts.org

Congenital Heart Information Network
1561 Clark Dr
Yardley, PA 19067
Tel: (215)493-3068
Fax: (215)493-3068
Email: mb@tchin.org
Internet: http://www.tchin.org

For a Complete Report

This is an abstract of a report from the National Organization for Rare Disorders, Inc. ® (NORD). A copy of the complete report can be obtained for a small fee by visiting the NORD website. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational treatments (if available), and references from medical literature. For a full-text version of this topic, see http://www.rarediseases.org/search/rdblist.html

The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.
It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report.
This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email orphan@rarediseases.org
Last Updated: 8/29/2003
Copyright 1986, 1994, 1995, 1996, 2003 National Organization for Rare Disorders, Inc.

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