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Abnormal Blood Flow
Abnormal Blood Vessels
Several congenital heart defects involve incorrectly formed or positioned blood vessels going to and from the heart. For example, transposition of the great arteries occurs when the pulmonary artery and the aorta are on the wrong sides of the heart. This is a serious and immediately life-threatening defect. Heart valve abnormalities
If the heart valves cannot open and close correctly, blood cannot flow smoothly. Examples include Ebstein's anomaly, in which the tricuspid valve is malformed and often leaks, and pulmonary atresia, in which a solid sheet of tissue forms in place of the pulmonary valve and blocks normal blood flow to the lungs. Both defects prevent oxygen-poor blood from circulating to the lungs.
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A combination of defects |
