C-18 | Novel CT-derived Parameter for Risk Stratification in Patients with Acute Pulmonary Embolism

Risk stratification models for acute pulmonary embolism (PE) lack positive predictive value to identify patients at highest risk of early PE-related mortality. Tricuspid Annular Plane Systolic Excursion (TAPSE) and tissue doppler (S') from echocardiogram are validated metrics of RV function. Computed tomography angiography (CTA) derived Hounsfield Unit (HU) gradient has been shown to be a surrogate of cardiac index in acute PE. Our study examined HU gradient to aid in stratifying the PE population.