Pulmonary embolism

This study tests two experimental drugs, REGN7508 and REGN9933, to prevent strokes in people with atrial fibrillation (an irregular heartbeat) who cannot or choose not to take standard blood thinners. About 2,628 participants will receive one of the drugs or a placebo to see if t…

This study tests an experimental drug called REGN7508 (cenvacibart) against aspirin to prevent blood clots in 2000 adults having knee replacement surgery. The drug targets a clotting factor to reduce clot risk. Researchers will compare how many people develop clots or die from cl…

This study is testing a device called FlowTriever that removes blood clots from the lungs in people with a severe, high-risk pulmonary embolism. About 200 participants will be randomly assigned to get either the device or standard care. The goal is to see if the device reduces de…

Researchers are testing a smartphone app designed to support patients after a pulmonary thromboembolism, a blood clot in the lungs. The app sends education and alerts tailored to each patient's clot and bleeding risk, and lets thrombosis doctors reach out during follow-up. The tr…

After hip or knee replacement, all patients currently get the same dose of blood thinners to prevent clots, but some still get clots while others bleed. This trial will test whether giving a shorter course to low-risk patients and a stronger, longer course to high-risk patients c…

This study tests a new device called the Vibrato Aspiration System, designed to remove blood clots from the lungs in people with acute pulmonary embolism (a sudden blockage in the lung artery). The trial includes up to 10 adults aged 18 to 75 who have had symptoms for 14 days or …

This study tests an experimental drug, REGN7508, to see if it works better than the standard blood thinner apixaban for treating and preventing blood clots in people with cancer. The trial will include about 1,600 participants with or without cancer who have deep vein thrombosis …

This study will test a device called EkoSonic in 30 Chinese patients with acute pulmonary embolism (blood clots in the lungs). The device uses ultrasound to help break up clots while delivering clot-busting medicine. The main goal is to see if it improves heart function within 48…

This study tests whether a personalized, home-based exercise program can help people who have had a moderate-to-severe pulmonary embolism (a blood clot in the lungs) improve their physical capacity and quality of life. Participants will be randomly assigned to receive the exercis…

This study is testing two catheter-based devices, Symphony and Prodigy, that remove blood clots from blood vessels in the legs, arms, or lungs. Researchers want to see if these devices can safely restore blood flow and prevent serious outcomes like amputation or heart strain. The…

This study tests a new device called the Laguna Thrombectomy System to remove blood clots from the lungs in people with pulmonary embolism. About 107 adults with moderate to severe clots will be treated, and doctors will check for safety and effectiveness within 48 hours. The goa…

This trial tests a special catheter that delivers clot-dissolving medication directly into the lung arteries of people with intermediate-risk pulmonary embolism. The goal is to see if this targeted approach can safely treat the clot without needing intensive care or a continuous …

This registry is studying a drug called non-immunogenic staphylokinase (Fortelyzin®) given as a single injection to dissolve blood clots in the lungs. It will include up to 20,000 adults with massive pulmonary embolism who are already receiving the drug in routine care. The goal …

This study is testing a device called the Indigo Aspiration System to remove blood clots from the lungs in people with a pulmonary embolism. The goal is to see if it is safe and helps patients recover better in the long run. About 1500 adults with recent clots will take part.

This phase 3 trial will test three ways to treat intermediate high-risk pulmonary embolism (a serious blood clot in the lungs). The study compares two catheter-based procedures (mechanical clot removal or low-dose clot-busting drug) with standard blood-thinning heparin. About 210…

This study compares a daily pill (rivaroxaban) to daily injections (low-molecular-weight heparin) for preventing blood clots in people with leg injuries that require a cast or brace. About 1,424 high-risk participants will be randomly assigned to one of the two treatments and fol…

This study compares two approaches for low-risk patients with small blood clots in the lungs (isolated subsegmental pulmonary embolism). Half will receive standard blood-thinning medication (rivaroxaban), while the other half will get a placebo and be closely monitored. The goal …

This study tests whether using a catheter to remove blood clots from the lungs, along with standard blood thinners, helps people with submassive pulmonary embolism recover better than blood thinners alone. About 500 adults with large clots and an enlarged right heart chamber will…

This study tests a device that removes blood clots from the lungs of people with acute pulmonary embolism and then returns the cleaned blood back to their body. The goal is to see if this approach is safe and effective at reducing blood loss and complications. About 39 adults wit…

This study looks for the best way to treat people who have a blood clot (like in the leg or lung) and also take daily aspirin or similar drugs for heart disease. Both conditions need blood thinners, but taking them together raises the risk of dangerous bleeding. The trial will co…

This study looks at whether people with active cancer who have a blood clot in their lungs (pulmonary embolism) can be safely treated at home instead of in the hospital. About 824 participants will be randomly assigned to either go home within 24 hours or stay in the hospital for…

This study follows 82 people who receive the Celect Platinum Vena Cava Filter, a device placed in a large vein to catch blood clots and prevent them from reaching the lungs. Researchers will track safety and performance for up to 5 years, checking for problems like filter movemen…

This study tests whether a specially adjusted dose of the blood thinner apixaban can safely treat blood clots in cancer patients who also have low platelet counts. About 30 adults with active cancer and a recent clot will receive the adjusted dose. The goal is to see if this appr…

This study tracks 180 people who had a serious but stable pulmonary embolism (a blood clot in the lung) and received a treatment that uses ultrasound waves to help a clot-busting drug work better. The main goal is to see if this approach reduces the chance of developing pulmonary…

This study looks at 200 people who had a bleeding stroke caused by high blood pressure. Doctors want to know if starting blood thinners (heparin) early—within 2 days—or waiting until day 3 is safer and better at preventing blood clots in the legs or lungs. Participants get brain …

This study tests a treatment that uses a thin tube and ultrasound waves to break up dangerous blood clots in the lungs. It is for people with moderate-to-high risk pulmonary embolism who cannot safely receive standard clot-busting drugs due to bleeding risks. The study will track…

This study tests whether using a catheter to break up or remove blood clots early, along with standard care, can save more lives in people with a massive pulmonary embolism. About 210 participants will be randomly assigned to receive either catheter treatment within 60 minutes pl…

This Phase 3 trial tests whether Kinisoquin™, a supplement-like drug made from isoquercetin plus vitamins C and B3, can prevent dangerous blood clots in 480 people with advanced pancreatic cancer. Participants receive either Kinisoquin™ or a placebo alongside their first chemothe…

This study tests a pharmacy-led program for low-income patients with multiple chronic conditions like diabetes, heart disease, and depression. After leaving the hospital, participants get their medications with no copay, delivery to their bedside and home, and help from a pharmac…

This study is testing whether adding rosuvastatin (a common cholesterol-lowering drug) to standard blood thinner treatment can lower the risk of another blood clot in people who have recently had a deep vein thrombosis or pulmonary embolism. About 2,700 participants will receive …

This study compares two types of blood thinners taken as pills (apixaban and rivaroxaban) against a standard daily injection (enoxaparin) to prevent dangerous blood clots in people with blood cancers like lymphoma, leukemia, and multiple myeloma. About 100 participants will be ra…

This study tests a single injection of a clot-dissolving drug (staphylokinase) in 486 adults with intermediate high-risk pulmonary embolism—a serious blood clot in the lungs. The goal is to see if it prevents death, heart collapse, or another clot compared to a placebo. Participa…

This study tests whether a shared decision-making process, which uses personalized risk scores, can help patients with unprovoked blood clots choose the best duration of blood-thinning medication. The goal is to reduce the chance of another clot or serious bleeding while improvin…

This trial is testing a device called AlphaVac that suctions blood clots out of the lung arteries in people with acute pulmonary embolism (PE). The study will enroll 256 adults with a confirmed PE and signs of heart strain. The main goals are to see if the device reduces heart st…

This study explores whether a low-dose CT scan without contrast dye can accurately detect pulmonary embolism (blood clots in the lungs). Researchers will enroll 750 adults suspected of having a clot and add two very low-radiation CT scans to their standard dye-based scan. The goa…

Researchers are studying whether thromboelastography, a blood test that measures clot formation, can predict outcomes for people having surgery for glial brain tumors. The trial enrolls about 100 adults who are scheduled for tumor removal or biopsy. By tracking clotting measureme…

This study is testing whether a noninvasive imaging technique called pulsatile electrical impedance tomography (EIT) can accurately diagnose acute pulmonary embolism — a life-threatening blood clot in the lungs. Researchers will compare EIT readings with standard CT scans in 275 …

This study looks at whether blood clots in the lungs (pulmonary embolism) are often missed in people hospitalized with acute heart failure. About 740 patients across multiple hospitals will take part. In half the hospitals, doctors will follow their usual approach; in the other h…

This study is testing whether a simple bedside heart ultrasound can help predict which emergency patients with a pulmonary embolism (a blood clot in the lung) are likely to have serious complications within the next few days. Researchers will perform the ultrasound on 250 patient…

This study compares a new type of CT scanner (photon-counting CT) with standard CT to see if it can better detect very small blood clots in the lungs, called subsegmental pulmonary embolism. About 696 adults with suspected acute pulmonary embolism will be scanned with both method…

This study tests a new bedside tool called Adjust-Unlikely to safely reduce unnecessary imaging for pulmonary embolism (a blood clot in the lungs) in emergency patients. Researchers will enroll 4,000 adults in Canada to see if the tool accurately identifies who does not need a sc…

This study tests whether a non-invasive device called electrical impedance tomography (EIT) can accurately diagnose pulmonary hypertension, a serious lung condition. Currently, diagnosis requires an invasive procedure called right heart catheterization. Researchers will compare E…

This study looks at whether two simple checklists (PERC and YEARS) can safely reduce the number of CT scans needed to diagnose pulmonary embolism (a blood clot in the lungs). Researchers will review the records of 500 adults who came to the emergency room with suspected clots. If…

This study is looking for specific protein patterns in the blood that could help diagnose chronic thromboembolic pulmonary hypertension (CTEPH), a rare but serious complication of blood clots in the lungs. Researchers will analyze blood samples from 120 people suspected of having…

This study is testing a standard screening method to find a condition called chronic thromboembolic pulmonary hypertension (CTEPH) in people who had a blood clot in their lungs 3 to 12 months earlier. Researchers will check if certain tests, like heart ultrasound or lung scans, c…

This study is testing a new portable X-ray machine called Dynamic Digital Radiography (DDR) that takes 15 images per second to show how the lungs move and blood flows. Researchers at Brigham and Women's Hospital will use it on 230 ICU patients with various lung conditions to see …

This study compares a new, radiation-free bedside test using saline contrast and electrical impedance tomography (EIT) against standard CT scans (CTPA) for diagnosing acute pulmonary embolism (blood clots in the lungs). Researchers will enroll 343 patients with suspected or confi…

This trial tests whether doing ultrasound scans twice a week on critically ill patients can catch deep-vein thrombosis (DVT) early. The goal is to prevent pulmonary embolism (a clot in the lung) and reduce deaths within 90 days. The study will enroll 1,800 adults in the ICU who a…

This study tests whether taking a daily statin (rosuvastatin) for one year can safely prevent life-threatening blood clots in people with cancer. Current clot-preventing drugs raise bleeding risks, so a safer option is needed. The trial will enroll 4,000 adults with newly diagnos…

This phase 3 trial tests an experimental drug called REGN7508 to prevent blood clots in people with solid tumors who are receiving cancer treatment. About 1,120 participants will receive either the drug or a placebo. The study measures how well the drug prevents clots and checks …

This trial tests whether taking a low-dose aspirin pill every day for six weeks after delivery can prevent dangerous blood clots in the legs or lungs as effectively as the standard daily heparin injections. The study enrolls people who have given birth and have one or more risk f…

This study tests whether giving the flu vaccine to heart patients just before they leave the hospital can lower their risk of infections, heart problems, and death in the next 6 months. About 400 adults hospitalized for serious heart conditions will be randomly assigned to get th…

This study looks at whether a computer-assisted vacuum procedure to remove blood clots from the lungs is safe and improves quality of life for cancer patients with a moderate-risk pulmonary embolism. About 25 adults with cancer and a confirmed clot in a major lung artery will tak…

This study tests whether a 3-month pulmonary rehabilitation program (20 sessions of exercise and education) can improve quality of life and reduce breathlessness in people who have had a pulmonary embolism. Researchers will enroll 112 adults who still have symptoms at least 3 mon…

This study tests whether starting a structured exercise and education program within a month of a pulmonary embolism (a blood clot in the lungs) can prevent long-term problems like poor quality of life, shortness of breath, and reduced physical ability. About 160 hospitalized pat…

This study tests whether getting daily texts or emails with healthy living tips can help people recover after being hospitalized for a pulmonary embolism (a blood clot in the lungs). One hundred adults will receive these tips for 8 weeks while also taking standard blood thinners.…

This study tests whether a 6-week outpatient pulmonary rehabilitation program helps people with post-PE syndrome (lingering symptoms after a pulmonary embolism) walk farther and breathe better. About 48 adults who had a pulmonary embolism 12 to 36 weeks earlier will be randomly a…

This study follows 400 adults diagnosed with pulmonary embolism (a blood clot in the lungs) at a Swedish hospital. Researchers will repeatedly check heart tests and blood markers during the first 48 hours to see if early changes can better predict who will worsen. The goal is to …

Researchers are testing whether a new 2026 AHA/ACC classification system, which sorts patients with acute pulmonary embolism into categories A through E, can predict who will have a major adverse event within 30 days. The study will enroll 600 adults diagnosed with pulmonary embo…

This study looks at whether a special blood test, called a thrombin generation assay, can predict bleeding risk in cancer patients who are taking blood thinners for blood clots. Researchers will follow 212 patients for 6 months, measuring their blood's clotting ability and tracki…

This registry will follow 1000 adults with pulmonary embolism (blood clots in the lungs) who are treated with Inari Medical devices. Researchers will track device-related complications and deaths to understand how safe these tools are in everyday use. The study is observational, …

This observational study will follow 1300 critically ill adults in intensive care to see if a blood test called anti-factor Xa activity can predict dangerous blood clots (deep vein thrombosis or pulmonary embolism). Researchers will also track bleeding risks, quality of life, and…

This study is tracking 2000 patients with moderate to severe pulmonary embolism (blood clots in the lungs) who undergo a procedure called computer-aided vacuum thrombectomy, where a special tube sucks out the clot. Researchers want to see how well the procedure works and what com…

This study looks at 32 people who still have shortness of breath or reduced quality of life after a pulmonary embolism (a blood clot in the lungs). They will receive a special PET/CT scan before and after a pulmonary rehabilitation program to see how the treatment improves lung f…

This study looks at 665 people who had a pulmonary embolism (a blood clot in the lung) and are at intermediate risk of another clot. Researchers will use a special 3D lung scan (V/Q SPECT/CT) to measure leftover blockages in lung blood vessels. The goal is to see if this scan can…

This study looks at whether a simple heart ultrasound can help predict which patients with a blood clot in the lungs (pulmonary embolism) are at higher risk for serious problems. Researchers will check right heart function in 112 adults and track outcomes like breathing failure, …

This study tests a training program that teaches advanced practice providers (like nurse practitioners and physician assistants) in the emergency department how to use a portable ultrasound to check the heart. About 75 providers will take a simulation course, then use the ultraso…

This study is testing whether a bedside imaging technique called electrical impedance tomography (EIT) can reliably measure blood flow in the lungs of patients with chronic blood clots. Thirty-six people scheduled for surgery to remove these clots will be monitored with EIT befor…

This study is testing a software tool that uses DNA from a blood sample to predict the risk of blood clots returning in people with cancer who have finished 3-12 months of blood thinner treatment. The goal is to see if a low-risk result means it's safe to stop blood thinners with…

This study is a registry that follows up to 10,000 people who have been diagnosed with a blood clot (deep vein thrombosis or pulmonary embolism) and started blood-thinning medication within 14 days. Researchers at the Mayo Clinic will track how many patients have another clot or …

This study looks at whether people who have a blood clot in the lungs (pulmonary embolism) are more likely to have a stroke if they also have a small hole in their heart (called a PFO). About 1 in 4 people have this hole, which can let a clot travel to the brain. Researchers will…

This study is testing whether patients recovering from hip or knee replacement can safely skip elastic compression stockings and rely only on blood-thinning drugs to prevent dangerous blood clots. Over 1,200 participants will be randomly assigned to receive either drugs plus stoc…

This study follows 500 people with cardiogenic shock, a life-threatening condition where the heart suddenly can't pump enough blood. Researchers will collect data from four specialized centers to understand what treatments work best and why some patients do better than others. No…

This study is testing whether an artificial intelligence system can predict serious complications in people hospitalized with a pulmonary embolism (a blood clot in the lungs). Researchers will analyze CT scans from 2,000 adults to see if the AI can identify who is likely to die o…

This study looks at whether information from CT scans, along with lab tests, can predict which patients with a blood clot in the lungs (pulmonary embolism) will have serious problems within 30 days. Researchers will collect data from 300 patients to build a prediction tool. The g…

This study aims to validate the Caprini score, a tool that estimates blood clot risk, in 3,000 people undergoing varicose vein surgery. Participants will be followed for four weeks after procedures like laser treatment or vein stripping to see if the score accurately predicts who…

This study is observing 500 adults with severe pulmonary embolism (a dangerous blood clot in the lungs) to see if the timing of clot-busting treatments affects survival and complications. Researchers want to find the optimal time window to start treatment, similar to how heart at…

This study tests whether beetroot juice, which contains natural nitrates that relax blood vessels, can safely lower lung blood pressure in people with intermediate high-risk pulmonary embolism. 36 adult patients will receive either beetroot juice or a placebo for five days, along…

This study is testing whether a simple one-minute chair stand test can help doctors predict how well patients will recover from a non-severe pulmonary embolism (a blood clot in the lungs). Researchers will compare the test results with standard risk scores that use blood tests an…

This study uses a special type of MRI (called 129Xe gas exchange MRI) to take detailed pictures of how the lungs and heart work together. Researchers want to understand how these images change after treatments like blood transfusions or oxygen therapy. The study involves 125 adul…

This study is tracking 220 adults across Nordic countries who receive either clot-dissolving drugs or a catheter-based procedure for a severe pulmonary embolism. Researchers are comparing how often each treatment leads to serious bleeding or death within 30 days. The goal is to p…

This study is not testing a new drug or treatment. Instead, researchers are combining health information from 20,000 people across 14 European groups who have had blood clots (venous thromboembolism). By merging this data, they hope to better understand who is at risk for future …

This study looks at 100 adults hospitalized in the ICU for a serious pulmonary embolism (a blood clot in the lung). Researchers want to know how long it takes for the blood thinner (unfractionated heparin) to reach a level that prevents more clots. They will also check if faster …

This study aims to find out how often people develop a serious lung condition called chronic thromboembolic pulmonary hypertension (CTEPH) after having a blood clot in the lungs (pulmonary embolism). Researchers will use heart ultrasounds to look for early signs of heart strain i…

This study looks at whether giving a paravertebral nerve block during chest surgery can lower the chance of problems like lung infections, collapsed lungs, or breathing failure. Researchers will follow 500 adults having keyhole or robotic lung surgery. The goal is to see if this …

This study looks at how well tiny blood vessels in the lungs recover after a procedure called balloon pulmonary angioplasty (BPA) in people with chronic thromboembolic pulmonary hypertension (CTEPH). CTEPH is a condition where old blood clots block lung arteries, making it hard t…

This study tests whether a set of quality improvement tools—including guidelines, care protocols, and a mobile app—can help hospitals in China better prevent blood clots in patients. About 5,800 hospitalized adults will take part across multiple hospitals. The goal is to see if t…