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

Dr. John Wylie
Internal Medicine
7 doctors agree
In brief: 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.

In brief: 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.
Dr. John Wylie
Dr. John Wylie
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Dr. Thomas Heston
Family Medicine
2 doctors agree
In brief: 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.

In brief: 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.
Dr. Thomas Heston
Dr. Thomas Heston
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Dr. Ted King
Phlebology
2 doctors agree
In brief: 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.

In brief: 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.
Dr. Ted King
Dr. Ted King
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Dr. Klaus d Lessnau
Internal Medicine - Pulmonary Critical Care
1 doctor agrees
In brief: Mismatch
Normal ventilation and decreased perfusion, that is normal air but blocked blood flow by clots.

In brief: Mismatch
Normal ventilation and decreased perfusion, that is normal air but blocked blood flow by clots.
Dr. Klaus d Lessnau
Dr. Klaus d Lessnau
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Dr. Aaron Milstone
Internal Medicine - Pulmonology
1 doctor agrees
In brief: Various
Typically a pulmonary embolism will show defects on the perfusion portion of a ventilation/perfusion scan (also know as a vq).

In brief: Various
Typically a pulmonary embolism will show defects on the perfusion portion of a ventilation/perfusion scan (also know as a vq).
Dr. Aaron Milstone
Dr. Aaron Milstone
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