What Is a Lung Ventilation/Perfusion Scan?
National Heart, Lung, and Blood Institute
A lung ventilation/perfusion scan, or VQ scan, is a test that measures air and blood flow in your lungs. A VQ scan most often is used to help diagnose or rule out a pulmonary embolism (PULL-mun-ary EM-bo-lizm), or PE.
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Disclaimer: The information provided here should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. The information is provided solely for educational purpose and should not be considered a substitute for medical advice.