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16 Cards in this Set
- Front
- Back
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What is the definition of Transposition of the great vessels (TGV) ?
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The 2 majors vessels are actually reversed
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What are the two major vessels that are reversed ?
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- Aorta
- Pulmonary artery |
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What is the cause of TGV ?
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No real known cause
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Is TGV more common in males or females ?
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Males
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What is the percentage of CHD infants have in TGV ? |
5-7 % |
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25% of all TGV babies have a -------- ? |
VSD |
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True or False: Venous returns are usually normal in TGV babies ?
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True
Note: it creates 2 parallel circulations |
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What keeps TGV babies alive ?
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The presence of a PDA and ASD/VSD
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What is the pathophysiology of TGV ?
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- Oxygenated
- Deoxygenated |
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What is the path of both oxygenated and deoxygenated ?
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Oxygenated Deoxygenated
! ! Pulmonary Veins Vena Cava ! ! Left Atrium Right Atrium ! ! Left Ventricle Right Ventricle ! ! Pulmonary artery Aorta (systemic)
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How is TGV diagnosed ?
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- Within 24 hours of life
- Significant cyanosis at birth - No improvement wt supplemental oxygen - Fails "hyperoxia test" - Echocardiogram ( most definite) - Cardiac catherization ( occassionally) |
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What are signs and symptoms of TGV ?
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- Severe cyanosis
- Signs of congestive failure - Excessive sweating (cold and clammy sweat) - Poor feeding - Tachypnea - Lethargic - Big right to left shunt |
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What time of shunt is TGV ?
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Right to Left shunt
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What is the treatment for TGV ?
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- Keep infants stable until corrective surgery
- Prostalglandin- to dilate PDA - Balloon atrial septostomy - Surgery to cut out a section of septum between the atria |
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What are the Surgical correction of TGV ? |
- “Mustard”Procedure - The aorta and pulmonary artery are switched - The coronary arteries are replanted on to the new aorta - Closure of the VSD and ASD |
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What is the Prognosis of TGV ? |
- With no unusual risk factors, survival post-surgery has improved to 95%, when successful surgery is done as a newborn - May require additional surgeries if stenosis is noted |
