New imaging technique reveals how blood thinners reshape lung vessels after clots
NCT ID NCT04113421
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at 10 people hospitalized with a blood clot in the lung (pulmonary embolism). Researchers used a special 3D CT scan technique to compare lung blood vessels before and 48 hours after standard blood thinner treatment. The goal was to measure changes in blood flow and heart function, not to test a new drug or cure.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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10 people
The number who actually took part.
- Started
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Dec 2019
- Finished
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Nov 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Inpatients diagnosed with acute PE, in whom clinical providers have elected to prescribe anticoagulation alone for treatment based on clinical grounds at BWH.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Inpatients diagnosed with acute PE, in whom clinical providers have elected to prescribe anticoagulation alone for treatment based on clinical grounds at BWH. * Eligibility for the study will include patients over the age of 18 with bilateral proximal PE on CT (filling defect in ≥ 1 main, lobar, or segmental pulmonary artery), PE symptom duration ≤ 14 days, RV-to-LV diameter ratio ≥ 0.9 on contrast-enhanced chest CT, and a clinically-determined decision to pursue treatment with anticoagulation alone. Exclusion Criteria: 1. Serum creatinine greater than 2 mg/dL 2. GFR \< 60 mL/min 3. Pregnancy (pregnancy test will have been done as standardly required by Radiology before the initial clinically-indicated, clinically-protocolled chest CT) 4. Contrast allergy 5. Treatment with any fibrinolytics-based technique, or surgical/ catheter embolectomy 6. Expected hospital stay \< 48 hours. The length of stay will be determined by the treating provider prior to enrollment. Subjects will not extend their stay to 48 hours if they are deemed ready for discharge prior to the time.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Brigham and Women's Hospital
Boston, Massachusetts, 02115, United States
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Other studies related to the condition(s) this trial covers.
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