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The first 25 slides, exactly as they appear. The full deck has 53 content slides.
Radiology
Double-Outlet Right Ventricle
Built from Obstetric Imaging
What’s inside
9 sections · 53 slides
Overview
- What this topic covers
What the defect is
Taking the name apart, and what goes wrong in the embryo
- The name, taken apart
- How the book defines it
- Both great arteries rising from the right ventricle
- How the two arteries end up on the same side
- What causes it
How common it is
Common on the fetal scan, rare in the nursery
- 4%–8%
- Why the numbers fall between scan and birth
The hole that decides everything
Where the ventricular septal defect sits, and the five patterns that follow
- The ventricular septal defect
- A hole in the wall between the ventricles
- The five patterns, by where the hole sits
- Which hole positions turn up most
- Fallot type — the commonest pattern, 40%
- A normal heart beside a heart with tetralogy of Fallot
- Fallot-type double-outlet right ventricle
- Transposition type — 20%
- Transposition of the great vessels
- Transposition-type double-outlet right ventricle
- VSD type — 15%
- Doubly committed defect — 10%
- Noncommitted or remote defect — under 10%
What comes with it
Genes, other heart lesions, and problems outside the heart
- Genetic problems
- Other heart lesions found alongside
- Problems outside the heart
- How the baby presents after birth
Finding it on the scan
Why it hides in plain sight, and what actually gives it away
- Why it is easy to miss
- A four-chamber view that looks normal
- What the four-chamber view shows
- The hole, and which way blood crosses it
- The views that actually reveal it
- The 50% rule
- Fallot-type appearance on ultrasound
- Aorta and pulmonary artery seen together above the right ventricle
- Telling the two great arteries apart
- Transposition-type appearance on ultrasound
- Colour flow through both great arteries
- The scanning sequence
- Classic signs
What else it could be
Two look-alikes, separated by one measurement
- Tetralogy of Fallot and malalignment VSD
- Transposition of the great arteries with a VSD
- Where the hole sits, what the arteries do
What to do about it
Before birth, and the operations after it
- Before birth
- Follow-up and delivery planning
- Surgery after birth
- When a switch is not possible
- 30%–50%
- Reading those survival figures
Take home
What to tell the referring physician, and what to remember
- What the referring physician needs to know
- Key points
- References
- References (continued)
- Suggested reading
- Obstetric Imaging: Fetal Diagnosis and Care, 2nd Edition