An Analysis of Patients That Underwent Computed Tomography Pulmonary Angiography with the Prediagnosis of Pulmonary Embolism in the Emergency Department

Table 1

The Wells criteria for assessment of pretest probability of pulmonary embolism.

(a)

Criterion	Points
Suspected DVT	3.0
An alternate diagnosis is less likely than PE	3.0
Heart rate > 100 beats/min	1.5
Immobilization or surgery in the previous four weeks	1.5
Previous DVT/PE	1.5
Hemoptysis	1
Malignancy (on treatment, treated in past six months)	1

(b)

Score range	Mean probability of PE	%with score	Interpretation of risk
0–2 points	3.6%	40%	Low
3–6 points	20.5%	53%	Moderate
>6 points	66.7%	7%	High

Source: [17].