The 3VT (Three-Vessel-Trachea) view is a key component of fetal cardiac ultrasound.
It allows quick evaluation of the great vessels and helps detect major congenital heart defects.
What is the 3VT View?
The 3VT view shows three important vessels:
- Pulmonary artery (PA)
- Aorta (Ao)
- Superior vena cava (SVC)
These vessels are visualized in relation to the trachea, providing insight into their size and alignment.
Normal 3VT View
In a normal 3VT view:
- The pulmonary artery is the largest
- The aorta is slightly smaller
- The superior vena cava is the smallest
- All vessels are aligned from left to right
- A V-shaped confluence is typically seen
This pattern indicates normal great vessel anatomy.
Abnormal 3VT View
Abnormal findings may include:
- Disproportionate vessel size
- Missing or poorly visualized vessel
- Abnormal alignment
- Absence of the V-shaped confluence
These findings may suggest congenital heart disease.
Common Associated Conditions
Abnormal 3VT findings are often associated with:
- Tetralogy of Fallot (TOF)
- Double Outlet Right Ventricle (DORV)
- Pulmonary Atresia
Why This Matters
The 3VT view is a powerful screening tool.
Even when the 4-chamber view appears normal, abnormalities may still be detected in the 3VT view.
Conclusion
Understanding the difference between normal and abnormal 3VT patterns is essential for accurate fetal cardiac assessment.
Early detection leads to better diagnosis and management.
Normal vs Abnormal 3VT view showing vessel size and alignment differences on fetal ultrasound.
