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A 24-year-old member asked:

What does blood clot in the lungs (pulmonary embolus) show on ventilation perfusion scan?

5 doctor answers13 doctors weighed in
Dr. John Wylie
Internal Medicine 22 years experience
Lack of blood flow: A ventilation perfusion scan is a test for a blood clot in the lungs, or pulmonary embolism. If there is a blood clot, an area of the lung will not be perfused, but will be ventilated, and therefore a mismatch will be seen.
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Dr. Aaron Milstone
Pulmonology 28 years experience
Various: Typically a pulmonary embolism will show defects on the perfusion portion of a ventilation/perfusion scan (also know as a vq).
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Klaus d Lessnau
Pulmonary Critical Care 37 years experience
Mismatch: Normal ventilation and decreased perfusion, that is normal air but blocked blood flow by clots.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Ted King
A Verified Doctoranswered
41 years experience
Sometimes unclear: The findings of a ventilation perfusion scan can sometimes be non-specific and unhelpful. The better way to confirm a pe now is with a spiral ct scan of the lungs with infusion.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Thomas Heston
Family Medicine 30 years experience
Typical: The typical finding is a mismatch between ventilation and perfusion, however in people with small clots or underlying pulmonary disease the findings are the scan are not always clear.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Feb 6, 2018

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