1. Radiographic signs sometimes observed in pulmonary embolism
Radiographic signs sometimes observed in pulmonary embolism. Panel A: Westermark sign with oligemia of the right hemithorax relative to the right. VQ scan revealed an isolated perfusion defect of the right lung. Panels B and C are CT angiogram images revealing a saddle and right main pulmonary arterial embolus. Despite the massive appearance on CT, the patient was not in shock, and improved on heparin alone. A CT scan done 5 days later revealed clot only at the segmental level.
Source: Pulmonary Embolic Disorders: Thrombus, Air, and Fat, Principles of Critical Care, 4e
Citation: Hall JB, Schmidt GA, Kress JP. Principles of Critical Care, 4e; 2015 Available at: Accessed: December 20, 2017
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