Pulmonary Embolism Management

Introduction to Treatment Options

The European Society of Cardiology recommends thrombolytic therapy as the first-line treatment for patients with saddle pulmonary embolism presenting with cardiogenic shock and/or persistent arterial hypotension, with very few absolute contraindications 1
Immediate anticoagulation with intravenous unfractionated heparin, followed by thrombolytic therapy, is a recommended approach for patients with cardiogenic shock or persistent hypotension 1
Surgical or catheter embolectomy is considered if thrombolysis is contraindicated or has failed 1

Anticoagulation alone is recommended over routine thrombolysis, according to the American Society of Hematology 2
Close monitoring for development of hemodynamic compromise is essential, and thrombolysis should be considered in younger patients at low risk for bleeding 2
The European Society of Cardiology recommends anticoagulation alone, with thrombolysis not recommended, except in high-risk cases 1

Right heart thrombi, especially mobile ones, are associated with significantly increased mortality (80-100% if untreated), and treatment options include thrombolysis, surgical embolectomy, or anticoagulation alone 1
Thrombolysis has been shown to be effective, with 50-75% of clots disappearing within 12 hours, while surgical embolectomy is particularly indicated for right heart thrombi straddling the interatrial septum 1
Anticoagulation alone is less effective than thrombolysis or embolectomy for right heart thrombi 1

Thrombolysis reduces mortality in high-risk pulmonary embolism, according to the American Society of Hematology 2
However, thrombolysis is associated with increased risk of major bleeding (31 more per 1000 patients) and intracranial bleeding (7 more per 1000 patients) 2
Contraindications to thrombolysis include recent TIA, oral anticoagulant therapy, pregnancy, advanced liver disease, infective endocarditis, and active peptic ulcer 1

Surgical embolectomy is indicated for patients with contraindications to thrombolysis, failed thrombolysis, or with intracardiac thrombi, and is performed via median sternotomy with normothermic cardiopulmonary bypass 1
Recent data shows lower mortality (15.1%) compared to historical rates for surgical embolectomy 1

Catheter-directed thrombolysis may be considered for patients with viable limbs when a guide wire can be passed across the lesion, according to the American College of Radiology 3

Monitor platelet counts in patients treated with heparin, and discontinue heparin and use alternative anticoagulants if heparin-induced thrombocytopenia (HIT) develops 1
Delay in treatment for mobile right heart thrombi can lead to high mortality rates, emphasizing the importance of prompt recognition and treatment 1
Tricuspid regurgitation results from right ventricular dilation and dysfunction, leading to decreased cardiac output and increased mortality rates in patients with right heart strain, as noted by the American College of Cardiology 4
Right heart thrombi formation, especially mobile thrombi, is associated with high mortality rates (80-100% if untreated) in patients with right heart strain, according to the European Heart Journal 1
Atrial arrhythmias, particularly in congenital heart disease with right heart strain, are common and can lead to further complications, as reported by the European Heart Journal 5

The European Heart Journal recommends using CT findings, such as RV:LV ratio ≥0.9 or interventricular septal bowing, to diagnose right heart strain, although this method is highly sensitive (88%) but only moderately specific (39%) compared to TTE 1
Cardiac MRI provides detailed assessment of RV function and strain, allowing for early detection and monitoring of right heart strain, as noted by the European Heart Journal 1

The European Heart Journal recommends treating the underlying cause of right heart strain, such as pulmonary embolism or right ventricular infarction, with anticoagulation and maintaining right ventricular preload, respectively 1, 6
Hemodynamic support, including volume optimization and avoidance of vasodilators, is crucial in managing right heart strain, as reported by the European Heart Journal 6
Advanced therapies, such as thrombolysis or surgical embolectomy, may be necessary for severe cases of right heart strain, according to the European Heart Journal 1
The American College of Cardiology recommends using diuretics for symptom management in severe tricuspid regurgitation and considering tricuspid valve surgery for patients with severe TR undergoing left-sided valve surgery 4
Medical therapies to reduce pulmonary artery pressures in functional TR are also recommended by the American College of Cardiology 4

Serial echocardiography is essential for monitoring RV size, function, and response to therapy in patients with right heart strain, as noted by the European Heart Journal 7
Hemodynamic monitoring and laboratory monitoring, including daily assessment of blood urea nitrogen, creatinine, and electrolytes, are crucial in guiding therapy and preventing complications, according to the European Heart Journal 7
Excessive preload reduction with vasodilators and diuretics can worsen RV failure in RV infarction, as reported by the European Heart Journal 6
Heparin-induced thrombocytopenia is a life-threatening complication of heparin therapy that can worsen right heart strain, and monitoring platelet counts is essential, according to the European Heart Journal 1
Delaying treatment for mobile right heart thrombi can lead to high mortality rates, and immediate therapy is necessary, as noted by the European Heart Journal 1
Pregnancy considerations are crucial, as right heart strain may worsen during pregnancy due to increased blood volume and venous return, according to the European Heart Journal 5