Terrible Cyanotic Heart Diseases

Posted by e-Medical PPT Wednesday, July 21, 2010
Persistent truncus arteriosus is a rare form of congenital heart disease that presents at birth. In this condition, the embryological structure known as the truncus arteriosus never properly divides into the pulmonary artery and aorta.Most of the time, it occurs spontaneously. Genetic disorders, and teratogens have been associated as possible causes. Up to 50% of cases are associated with chromosome 22q11 deletions.
Dextro-Transposition of the great arteries (complete transposition of the great arteries), is a CHD  in the large arteries of the heart.The aorta and the pulmonary artery are transposed.It is  a cyanotic congenital heart defect  because the newborn infant turns blue from lack of oxygen.With simple d-TGA, if the foramen ovale and ductus arteriosus are allowed to close naturally, the newborn will likely not survive long enough to receive corrective surgery.While the foramen ovale and ductus arteriosus are open after birth, some mixing of red and blue blood occurs allowing a small amount of oxygen to be delivered to the body.
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