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The Resolution Rate of Pulmonary Embolism on CT Pulmonary Angiography: a Prospective Study
1Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, PA, United States.
European Journal of Radiology
|August 20, 2022
Summary
Clot resolution in acute pulmonary embolism (PE) varies by patient factors. CTPA imaging can predict resolution rates and inform anticoagulation therapy duration.
Area of Science:
- Radiology
- Cardiovascular Medicine
- Pulmonary Medicine
Background:
- Acute pulmonary embolism (PE) is a significant cause of morbidity and mortality.
- Assessing clot burden and resolution is crucial for managing PE.
- CT pulmonary angiography (CTPA) is a primary diagnostic tool for PE.
Purpose of the Study:
- To prospectively evaluate the rate of clot resolution in patients diagnosed with acute PE using CTPA.
- To identify factors influencing clot resolution in acute PE patients.
Main Methods:
- Prospective cohort study of 290 patients with acute PE.
- CTPA performed at presentation and follow-up within 6 months.
- Semi-automated quantification program used to measure clot volume.
- Interval-censored analysis applied to evaluate resolution rates.
Main Results:
- Overall complete resolution probability reached 71% by 45 days.
- Faster resolution observed in patients with peripheral clots and cancer.
- Slower resolution noted in patients with consolidation and a history of venous thromboembolism (VTE).
Conclusions:
- Clot resolution rates in acute PE are linked to clinical presentation and CTPA imaging biomarkers.
- Findings can aid in developing prediction rules for PE management.
- Information may guide decisions on the optimal duration of anticoagulation therapy.
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