Pulmonary Thromboembolism Disease Summary

Last updated: 25 June 2025

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Overview

The Introduction section defines pulmonary embolism (PE) as the blockage of one or more pulmonary arteries in the lungs caused by blood clots from the veins, especially the veins in the legs and pelvis.


Pulmonary Thromboembolism_Disease SummaryPulmonary Thromboembolism_Disease Summary



As stated in the Epidemiology section, the true incidence of pulmonary embolism is uncertain. Estimates on the incidence of pulmonary embolism are mentioned in this section.

The mechanism involved in the development of pulmonary embolism is discussed in the Pathophysiology section.

The Risk Factors section enumerates the primary and secondary factors that predispose the patient to develop pulmonary embolism.

The differences between massive and submassive pulmonary embolism are identified and discussed in the Classification section. 

History and Physical Examination

Typical signs and symptoms that occur in patients suspected of having pulmonary embolism are enumerated in the Clinical Presentation and Physical Examination sections. 

Diagnosis

Laboratory Tests and Ancillaries and Imaging studies to be considered in patients suspected of having pulmonary embolism are discussed in these sections.

Clinical pretest probability (CPTP), estimation of pretest probability, pulmonary embolism rule-out criteria (PERC) and prognostic risk assessment are discussed in the Diagnosis or Diagnostic Criteria section for pulmonary embolism.

Diseases that may present similar symptoms to pulmonary thromboembolism and should be ruled out are in the Differential Diagnosis section.

Management

Thrombolytic therapy should be considered in clinically unstable patients who may have massive pulmonary embolism. Evaluation of venous thromboembolism risk factors, assessment of massive pulmonary embolism and absolute and relative contraindications to thrombolysis are discussed in the Evaluation section.

Indications for inpatient management are listed in the Principles of Therapy section. Parenteral anticoagulation, thrombolytics, clinical instability management, oxygen supplementation, mechanical ventilation, hemodynamic support and nitric oxide inhalation discussions are also discussed in this section.

Details about the different drug options such as parenteral anticoagulants, non-vitamin K oral anticoagulants, Warfarin, and thrombolytics are in the Pharmacological therapy section.

Different invasive procedures that can be performed on patients with pulmonary thromboembolism who have contraindications to systemic thrombolysis are discussed in detail in the Nonpharmacological section.

Monitoring of anticoagulation treatment is discussed in this section.