Diagnosing PE: Step 1: Consciously consider the diagnosis Step 2: Risk Stratify into low, intermediate, and high risk Step 3: Choose appropriate testing based on pre-test probability Classification of PE * High Risk/Massive PE: Hemodynamic Instability * Intermediate Risk/Submassive PE: Right Heart Strain without instability ; or PESI Class 3+ * Low Risk/Non-Massive PE: Everything else (no instability, no heart strain, PESI Class 1-2) Treatment of PE * High Risk/Massive PE: Thrombolytics and often thrombectomy * Intermediate Risk/Submassive PE: Heparin and sometimes intervention * Low Risk/Non-Massive PE: Either discharge with DOAC or admit with heparin