The overall goal of this clinical research study is to prospectively assess primary outcomes related to pulmonary embolism (PE) that occur immediately (within 5 days) and within 30 days. The secondary goal is to compare validated prediction models and a modified European Society of Cardiology (ESC) approach that is primarily right ventricle dysfunction (RVD) driven with clinical risk assessment being secondary, and with primary outcomes of clinical deterioration within 5 days.

The investigators wish to develop the Pulmonary Embolism Short-term Clinical Outcomes Registry (PE-SCOR). The investigators also wish to determine the incidence of death and circulatory and respiratory deterioration, and administration of reperfusion therapy within 5 days in PE patients. The study will also evaluate the sensitivity, specificity and positive and negative predictive values of each RVD assessment option. The investigators will also derive a prediction model for PE patients for the primary outcome within five days. Finally, investigators will determine the functional outcomes of PE patients 30 days after PE.

Inclusion Criteria:

• Patients 18 years or older with image confirmed acute pulmonary embolism diagnosed within 12 hours of ED presentation will be eligible for enrollment.

Exclusion Criteria:

• Patients who refuse consent for 30-day clinical contact and follow-up.

Patients who present to the Emergency Department (ED) with image confirmed acute pulmonary embolism diagnosed within 12 hours of presentation.