What are the high-probability criteria for V/Q scanning diagnosis of pulmonary embolism (PE)?

Updated: Jun 06, 2019
  • Author: Daniel R Ouellette, MD, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Answer

The high-probability criteria are as follows:

  • Two large (>75% of a segment) segmental perfusion defects without corresponding ventilation or chest radiographic abnormalities

  • One large segmental perfusion defect and two moderate (25-75% of a segment) segmental perfusion defects without corresponding ventilation or radiographic abnormalities

  • Four moderate segmental perfusion defects without corresponding ventilation or chest radiographic abnormalities


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