|
ULTRASOUND CRITERIA
– TRICUSPID ATRESIA |
- Hypoplastic right ventricle.
|
|
|
|
|
|
- Tricuspid valve.
- Valve orifice is hyperechoic and thickened.
|
|
|
- No flow on either side of the valve on color doppler.
- If the valve is severely stenotic high velocities and turbulence should be present just distal to the valve.
- Pulmonary artery is usually small but may be normal.
- It is important to ascertain patency of the pulmonary artery, as pulmonary atresia with an intact interventricular septum will also manifest as hypoplasia of the right ventricle.
- Large left atrium.
- Dilated hypertrophied left ventricle.
- The left sided heart enlargement is due to blood being shunted across foramen ovale, as it cannot enter the right ventricle.
- Aneurysmal dilatation of the foramen ovale may occur secondary to right atrial dilatation.
- Reverse flow in the ductus arteriosus to fill the pulmonary arteries in a retrograde direction.
- Atrial septal defect - ± 1/3 of cases.
- Usually an ostium secundum ASD.
- Ostium primum ASD or complete absence of the atrial septum is less common.
|
|
|
|
|
Video Clip of
Tricuspid Atresia
|
|
|
|
|
|
