Well's Criteria (Modified) for Pulmonary Embolism, PE

Score > 4 means PE is likely.

3 Points:

• Clinical Signs of DVT (Deep Vein Thrombosis), 
• Alternative Diagnosis is less likely than PE

1.5 Points:

• Previous PE or DVT
• HR > 100
• Recent immobilization

1 Point:

• Hemoptysis
• Cancer

To confirm PE, do CT Chest with IV contrast.