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New imaging technique reveals how blood thinners reshape lung vessels after clots

NCT ID NCT04113421

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

10 people

The number who actually took part.

Started

Dec 2019

Finished

Nov 2025

Lead sponsor

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

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

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

  • Brigham and Women's Hospital

    Boston, Massachusetts, 02115, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.