**6. Conclusion**

This chapter focused on the prognostic value of RV dysfunction as measured by chest CT in patients with hemodynamically stable PE. Although echocardiographic assessment of RV dysfunction is a generally accepted imaging modality, the lack of a clear echocardiographic definition of RV dysfunction, and the poor RV images, reduces its diagnostic capabilities. RV dysfunction assessed by CT, including RV enlargement, RV/LV ratio, interventricular septal bowing, pulmonary obstruction score, and pulmonary perfusion defect have been associated with poor patient outcomes. Risk stratification of patients with stable PE based on chest CT findings may comparable in results to echocardiography and may be useful.
