In most cases, the patients condition will deteriorate to the point of inoperability if the defect is not corrected in the first year.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; if ASD, VSD, PFO, and/or PDA are present, this will allow a higher amount of the red and blue blood to be mixed, therefore delivering more oxygen to the body, but can complicate and lengthen the corrective surgery and/or be symptomatic.Modern repair procedures within the ideal timeframe and without additional complications have a very high success rate. Epidemiology
Heart defects are the most common birth defect, occurring in approximately 1% of live births. 5–7% of these are dextro-transposition of the great arteries. Such defects appear to be more common in men than women. Approximately one million people worldwide are currently living with a CHD.Having a child with a CHD increases an individuals chances of having another child with a CHD from 1% to 3%. Subsequent children born with a CHD increase that individuals chances further. See also
Levo-Transposition of the great arteries
Transposition of the great vessels

References
External links
ped/2548 at eMedicine
Success rates, although limited in data, appear to be in the low to mid ninety percent range. As most schwannomas are benign, many doctors will take the “watch and wait” approach and leave the tumors alone until they start causing harmful side effects. Schwannomatosis patients have multiple tumors and the risks of having so many surgeries outweigh the benefits. Prognosis
Many of the symptoms of schwannomatosis overlap with NF2. Schwannomas occur instead of the neurofibromas that are hallmarks of neurofibromatosis Type 1 (NF1). Multiple schwannomas manifest throughout the body or in isolated regions. The schwannomas develop on cranial, spinal and peripheral nerves. Chronic pain, and sometimes numbness, tingling and weakness. About 1/3 of patients have segmental schwannomatosis, which means that the schwannomas are limited to a single part of the body, such as an arm, a leg or the spine. There are several cases where people with schwannomatosis have developed a vestibular schwannoma (acoustic neuroma). An acoustic neuroma is a schwannoma on the vestibular nerve in the brain. This nerve is involved in hearing and patients with vestibular schwannomas experience hearing loss. However, bilateral vestibular schwannomas (vestibular schwannomas on both sides of the brain) do not occur in schwannomatosis. Juvenile vestibular tumors do not occur either. Patients with schwannomatosis do not have learning disabilities related to the disease. Symptoms are sometimes brought on by hormonal changes such as puberty and pregnancy. == References ==