Transposition of Great Arteries Flashcards
What type of condition is Transposition of Great Arteries?
Cyanotic congenital heart disease
What is Transposition of Great Arteries due to?
The failure of the aorticopulmonary septum to spiral during septation.
Which children are at increased risk of Transposition of Great Arteries?
Children of diabetic mothers
What happens in TGA?
The attachments of the aorta and the pulmonary trunk to the heart are swapped (“transposed”).
Where does the right ventricle pump blood to in someone with TGA?
Aorta
Where does the left ventricle pump blood to in someone with TGA?
Pulmonary vessels
Why is TGA life threatening at birth?
There is no connection between the systemic circulation and the pulmonary circulation.
How will a baby with TGA present?
- cyanosis
- tachypnoea
- loud single S2
- prominent right ventricular impulse
What might you see on a chest x-ray of someone with TGA?
‘egg-on-side’ appearance on chest x-ray
How is TGA diagnosed?
Antenatal ultrasound
What is the management of TGA?
Maintenance of the ductus arteriosus with prostaglandins
Surgical correction is the definite treatment- open heart surgery
Why are prostaglandins given?
To keep the ductus arteriosus open
What is the definitive management for TGA?
Surgical management
What is TGA associated with?
- Ventricular septal defect
- Coarctation of the aorta
- Pulmonary stenosis
