TABLE 3

90-Day V/Q and CTPA Comparison (n = 24)

First scan result (n)Result of repeated scanCTPAV/Q
V/Q negative (8)Negative42
Positive01*
Other1 (chronic PE)0
V/Q indeterminate (8)Negative60
Positive00
Other1 (indeterminate)1 (chronic PE)
V/Q positive (4)Negative10
Positive30
Other00
CTPA negative (3)Negative21
Positive00
Other00
CTPA indeterminate (1)Negative00
Positive01
Other00
  • * V/Q repeated 57 d after initial V/Q on another hospitalization. Subsequent CTPA performed during that hospitalization was reported as negative for pulmonary embolism; patient was discharged without anticoagulation.

  • Patient already on anticoagulation for prior deep vein thrombosis.

  • V/Q performed on day 7, and patient discharged on anticoagulation.

  • PE = pulmonary embolism.