- "V/Q mismatch" refers to a situation in which there is ventilation (V) without profusion (Q) caused by the thrombus. So, there will be air going to the entire lung, but areas of no blood secondary to obstruction by the PE
- Unfortunately, the test is often non-diagnostic [15]
- The key for diagnostic use of V/Q scan is when the results are considered with clinical probability
- High clinical probability with high probability V/Q scans resulted in a 95% likelihood of a person having a PE
- Normal V/Q scan excluded a PE
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