Pulmonary Embolism Risk Factors and Management
Risk Factors for Pulmonary Embolism
- The European Respiratory Society identifies lower limb fractures as a strong risk factor for pulmonary embolism 3
- Hospitalization for heart failure or atrial fibrillation/flutter within the previous 3 months is a strong risk factor for pulmonary embolism 3
- Hip or knee replacement surgery increases the risk of pulmonary embolism 3, 4
- Major trauma is a strong risk factor for pulmonary embolism 1, 3
- Myocardial infarction within the previous 3 months is a strong risk factor for pulmonary embolism 3, 5
- Previous venous thromboembolism is a strong risk factor for pulmonary embolism 3
- The European Respiratory Society recommends considering the risk of pulmonary embolism in patients with cancer, as it increases the risk of thrombotic events 1, 3
- Oral contraceptive therapy increases the risk of venous thromboembolism, with combined oral contraceptives increasing the risk 2-6 fold 1, 6
- The European Society of Cardiology identifies age as a risk factor for pulmonary embolism, with increasing age associated with higher risk 3, 5
Management Strategies for Pulmonary Embolism
- The European Heart Journal recommends risk stratification for pulmonary embolism management, with high-risk PE characterized by shock or hypotension and evidence of right ventricular dysfunction 7
- The European Society of Cardiology recommends anticoagulation as the standard treatment for all confirmed pulmonary embolism cases 7
- Thrombolysis or embolectomy is indicated for high-risk pulmonary embolism 7
- The European Respiratory Society recommends supportive treatment for right ventricular failure in high-risk pulmonary embolism 7
- The European Heart Journal recommends considering rescue thrombolysis for intermediate-risk pulmonary embolism if clinical deterioration occurs 7
Pathophysiological Consequences of Pulmonary Embolism
- Pulmonary embolism interferes with both circulation and gas exchange, leading to right ventricular failure and respiratory failure 3, 5
- Right ventricular failure due to acute pressure overload is the primary cause of death in severe pulmonary embolism 5
- Ventilation/perfusion mismatch contributes to hypoxemia in pulmonary embolism 3