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Radiology
Anomalies of the Pulmonary Venous Return
Built from Obstetric Imaging
What’s inside
7 sections · 49 slides
Overview
- What you will learn here
The normal route, and the wrong turn
What the pulmonary veins do, and what “anomalous return” means
- Where blood from the lungs should go
- When the return line joins the wrong circuit
- Total or partial, and why it matters
- 7–9
- The company it keeps
- Is it inherited?
- Where the misrouted veins go instead of the left atrium
Why the fetus copes and the newborn crashes
One open door keeps the baby well until the moment it shuts
- The chain of events
- The door that keeps the fetus safe
- Birth turns a quiet defect into an emergency
Four types, named by the destination
Darling’s classification sorts APVR by where the wrong drainage lands
- Sorting APVR by where the blood ends up
- Draining upward, above the heart
- Draining straight into the heart
- Draining downward, below the diaphragm
- Different veins, different destinations
How it shows up
Silent before birth; loud, or silent again, after it
- Quiet in the womb, then two very different stories
Finding it before birth
Almost every clue is indirect, which is why the defect is often missed
- Why this one slips through
- Six clues that raise the suspicion
- What the four-chamber view should show
- Measuring the gap behind the left atrium
- Extra pipes that should not be there
- The screening plane where the search begins
- Vein collector pooling behind the left atrium
- What to notice in that grey-scale image
- Colour Doppler showing the veins running into the collector
- Why colour is added to the picture
- Two findings that confirm the suspicion
- Flat, non-pulsatile flow in the abnormal veins
- Reading the flat waveform
- A pulmonary vein joining the right atrium directly
- The one direct sign you may catch
- Handle these signs with care
- A three-dimensional way to look again
- “
- How the diagnosis is actually built
What happens next
Where to deliver, what surgery achieves, and the numbers behind it
- Planning the delivery
- The first hours after birth
- <10%
- Reading those three numbers
- What the referring physician needs to know
- Key points
- Take-home summary
- Suggested readings
- References
- References (continued)
- References (continued)
- References (continued)
- Obstetric Imaging: Fetal Diagnosis and Care, 2nd Edition