Ultrasound-facilitated, Catheter-directed, Thrombolysis in Intermediate-high Risk Pulmonary Embolism

NCT ID: NCT04790370

Last Updated: 2026-01-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE4

Total Enrollment

544 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-08-02

Study Completion Date

2026-08-31

Brief Summary

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There are many available treatments for pulmonary embolism (PE), but the best treatment for this condition is not known. The HI-PEITHO study will compare two treatment options that are both available on the market for the treatment of PE.

Patients will be randomized 1:1 to receive either blood thinners (anticoagulation) or blood thinners (anticoagulation) in combination with a device called the EkoSonicTM Endovascular device to dissolve blood clots. Patients will be followed for 12 months after randomization and have assessments while in the hospital as well as at 7 days, 30 days, 6 months and 12 months after randomization. The study will try to find out if one of these treatments is better than the other at reducing the risk of death and other serious problems.

Detailed Description

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This study will assess whether ultrasound-facilitated, catheter-directed thrombolysis and standard anticoagulation are associated with a significant reduction in the composite outcome of pulmonary embolism (PE)-related mortality, cardiorespiratory decompensation or collapse, or nonfatal symptomatic and objectively confirmed recurrence of PE compared to anticoagulation alone within seven days of randomization

The HI-PEITHO study has been designed to address the important gaps in clinical evidence by comparing the clinical benefit of the ultrasound-facilitated local delivery of a low dose thrombolytic agent and anticoagulation with those of anticoagulation alone in patients with intermediate-high risk PE at a higher estimated risk of early decompensation based on clinical parameters at presentation.

This study has a focus on improving the safety of thrombolysis and advancing the concept of intermediate-high risk and the PE severity criteria, to better identify patients who may clinically benefit from thrombolysis.

The results of this study will contribute further evidence to the existing data on the treatment and outcomes of acute, intermediate-high risk PE and provide controlled data related to catheter-based interventions.

Data will be entered by the site into an electronic database. The database will include data checks to compare data entered into the database against predefined rules for ranges and consistency with other data fields in the database.

Site monitoring will take place with source data verification to assess the accuracy and completeness of registry data by comparing the data to medical records and study assessments.

Conditions

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Pulmonary Embolism

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

1:1 randomization
Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors
Blinded adjudication of primary composite outcome

Study Groups

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Anticoagulation

Low-molecular weight heparin (LMWH) or unfractionated heparin (UFH)

Group Type ACTIVE_COMPARATOR

Anticoagulation with heparin

Intervention Type DRUG

Low-molecular weight heparin (LMWH) or unfractionated heparin (UFH)

Anticoagulation and EkoSonicTM Endovascular System

Low-molecular weight heparin (LMWH) or unfractionated heparin (UFH) and EkoSonicTM Endovascular System \[ultrasound-facilitated catheter-directed delivery of thrombolytic: 2 mg bolus/catheter + 1 mg/hour/catheter for 7 hours (total of 9 or 18 mg\]

Group Type ACTIVE_COMPARATOR

Anticoagulation with heparin

Intervention Type DRUG

Low-molecular weight heparin (LMWH) or unfractionated heparin (UFH)

EkoSonicTM Endovascular System

Intervention Type DEVICE

EkoSonicTM Endovascular System \[ultrasound-facilitated catheter-directed delivery of thrombolytic: 2 mg bolus/catheter + 1 mg/hour/catheter for 7 hours (total of 9 or 18 mg\]

Interventions

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Anticoagulation with heparin

Low-molecular weight heparin (LMWH) or unfractionated heparin (UFH)

Intervention Type DRUG

EkoSonicTM Endovascular System

EkoSonicTM Endovascular System \[ultrasound-facilitated catheter-directed delivery of thrombolytic: 2 mg bolus/catheter + 1 mg/hour/catheter for 7 hours (total of 9 or 18 mg\]

Intervention Type DEVICE

Other Intervention Names

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heparin, LMWH, UFH, anticoag, antiplatelet EKOS, USCDT, CDT, thrombolysis, fibrinolysis

Eligibility Criteria

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Inclusion Criteria

* Age 18-80 years, inclusive
* Objectively confirmed acute PE, based on computed tomography pulmonary angiography (CTPA) showing a filling defect in at least one main or proximal lobar pulmonary artery
* Elevated risk of early death/hemodynamic collapse, indicated by at least two of the following new-onset clinical criteria:

1. ECG-documented tachycardia with heart rate ≥100 beats per minute, not due to hypovolemia, arrhythmia, or sepsis;
2. SBP ≤ 110 mm Hg for at least 15 minutes;
3. respiratory rate \> 20 x min\^-1 or oxygen saturation on pulse oximetry (SpO2) \< 90% (or partial arterial oxygen pressure \< 60 mmHg) at rest while breathing room air;
* Right-to-left ventricular (RV/LV) diameter ratio ≥ 1.0 on CTPA
* Serum troponin I or T levels above the upper limit of normal
* Signed informed consent

Exclusion Criteria

* Hemodynamic instability\*, i.e. at least one of the following present:

1. cardiac arrest or need for cardiopulmonary resuscitation;
2. need for ECMO, or ECMO initiated before randomization
3. PE-related shock, defined as: (i) SBP \< 90 mmHg, or vasopressors required to achieve SBP ≥ 90 mmHg, despite an adequate volume status; and (ii) end-organ hypoperfusion (altered mental status; oliguria/anuria; increased serum lactate);
4. isolated persistent hypotension (SBP \< 90 mmHg, or a systolic pressure drop by at least 40 mmHg for at least 15 minutes), not caused by new-onset arrhythmia, hypovolemia, or sepsis \* Patients who presented with temporary need for fluid resuscitation and/or low-dose catecholamines may be included, provided that they could be stabilized within 2 hours of admission and maintain SBP of ≥ 90 mmHg and adequate organ perfusion without catecholamine infusion.
* Need for admission to an intensive care unit for a reason other than the index PE episode. NB: Patients who test positive for SARS-CoV-2 can be enrolled where the investigator believes that the pulmonary embolism is the dominant pathology in the patient's clinical presentation and qualifying cardiorespiratory parameters.
* Temperature above 39 degrees C / 102.2 degrees F
* Logistical reasons limiting the rapid availability of interventional procedures to treat acute PE (e.g., during the outbreak of an epidemic)
* Index PE symptom duration \> 14 days
* Active bleeding
* History of intracranial or intraocular bleeding at any time
* Stroke or transient ischemic attack within the past 6 months, or previous stroke at any time if associated with permanent disability
* Central nervous system neoplasm, or metastatic cancer
* Major neurologic, ophthalmologic, abdominal, cardiac, thoracic, vascular or orthopedic surgery or trauma (including syncope-associated with head strike or skeletal fracture) within the past 3 weeks
* Platelet count \< 100 x 10\^9 x L\^-1
* Patients who have received a once-daily therapeutic dose of LMWH or a therapeutic dose of fondaparinux within 24 hours prior to randomization
* Patients who have received one of the direct oral anticoagulants apixaban or rivaroxaban within 12 hours prior to randomization
* Patients who have received one of the direct oral anticoagulants dabigatran or edoxaban for the index PE episode, as these drugs are not approved for patients who have not received heparin for at least 5 days
* Administration of a thrombolytic agent or a glycoprotein IIb/IIIa receptor antagonist during the current hospital stay and/or within 30 days, for any reason
* Chronic treatment with antiplatelet agents other than low-dose acetylsalicylic acid or clopidogrel 75 mg once daily (but not both). Dual antiplatelet therapy is excluded.
* Chronic treatment with a direct oral anticoagulant (apixaban, dabigatran, edoxaban or rivaroxaban)
* Chronic treatment with a vitamin K antagonist, or known coagulopathy including severe hepatic dysfunction, with an International Normalized Ratio (INR) \> 1.5
* Pregnancy or lactation
* Previous inclusion in the study
* Known hypersensitivity to alteplase, LMWH or UFH, or to any of the excipients
* Life expectancy less than 6 months
Minimum Eligible Age

18 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National PERT Consortium, Inc.

UNKNOWN

Sponsor Role collaborator

University Medical Center Mainz

OTHER

Sponsor Role collaborator

Boston Scientific Corporation

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Stavros Konstantinides, MD

Role: PRINCIPAL_INVESTIGATOR

University Medical Center Mainz, Mainz, Germany

Kenneth Rosenfield, MD

Role: PRINCIPAL_INVESTIGATOR

Massachusetts General Hospital, Boston, Massachusetts, USA

Locations

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University of Alabama at Birmingham

Birmingham, Alabama, United States

Site Status

Cedars - Sinai Medical Center

Los Angeles, California, United States

Site Status

Christiana Hospital

Newark, Delaware, United States

Site Status

Piedmont Hospital

Atlanta, Georgia, United States

Site Status

Emory University Hospital

Atlanta, Georgia, United States

Site Status

Augusta University

Augusta, Georgia, United States

Site Status

Methodist Hospitals

Merrillville, Indiana, United States

Site Status

Jewish Hospital

Louisville, Kentucky, United States

Site Status

Baptist Health East Louisville

Lousville, Kentucky, United States

Site Status

University of Maryland School of Medicine

Baltimore, Maryland, United States

Site Status

Massachusetts General Hospital

Boston, Massachusetts, United States

Site Status

University of Michigan Hospitals

Ann Arbor, Michigan, United States

Site Status

Henry Ford Hospital

Detroit, Michigan, United States

Site Status

North Mississippi Medical Center

Tupelo, Mississippi, United States

Site Status

Nebraska Methodist Hospital

Omaha, Nebraska, United States

Site Status

Dartmouth-Hitchcock Medical Center

Lebanon, New Hampshire, United States

Site Status

Cooper Hospital - University Medical Center

Camden, New Jersey, United States

Site Status

Newark Beth Israel Medical Center

Newark, New Jersey, United States

Site Status

Mount Sinai Medical Center

New York, New York, United States

Site Status

Columbia University Medical Center

New York, New York, United States

Site Status

Lenox Hill Hospital

New York, New York, United States

Site Status

University Hospitals of Cleveland

Cleveland, Ohio, United States

Site Status

Kettering Health

Kettering, Ohio, United States

Site Status

Wellmont Holston Valley Medical Center

Kingsport, Tennessee, United States

Site Status

Vanderbilt University Medical Center

Nashville, Tennessee, United States

Site Status

Seton Medical Center

Austin, Texas, United States

Site Status

Houston Methodist Sugarland Hospital

Houston, Texas, United States

Site Status

The Heart Hospital Baylor Plano

Plano, Texas, United States

Site Status

University of Virginia Medical Center

Charlottesville, Virginia, United States

Site Status

University of Wisconsin Hospitals

Madison, Wisconsin, United States

Site Status

A.o. LKH Univ.-Kliniken Innsbruck

Innsbruck, , Austria

Site Status

Universitätsklinikum St. Pölten

Sankt Pölten, , Austria

Site Status

Allgemeines Krankenhaus AKH

Vienna, , Austria

Site Status

Austria Klinik Ottakring Vienna

Vienna, , Austria

Site Status

CHU de Besancon

Besançon, , France

Site Status

CHU (Nimes Cedex)

Nîmes, , France

Site Status

Hôpital Européen Georges Pompidou (HEGP)

Paris, , France

Site Status

Uniklinik Aachen

Aachen, , Germany

Site Status

Klinikum Bielefeld

Bielefeld, , Germany

Site Status

GFO Kliniken Bonn

Bonn, , Germany

Site Status

Klinikum Chemnitz

Chemnitz, , Germany

Site Status

Universitaetsklinikum Freiburg

Freiburg im Breisgau, , Germany

Site Status

Klinik Immenstadt

Immenstädt, , Germany

Site Status

Universitaetsklinikum Schleswig-Holstein

Lübeck, , Germany

Site Status

Johannes Gutenberg Universitaet Mainz

Mainz, , Germany

Site Status

Klinikum Rechts der Isar

Munich, , Germany

Site Status

Universitaetsklinikum Tuebingen

Tübingen, , Germany

Site Status

Universitaetsklinikum Wuerzburg

Würzburg, , Germany

Site Status

Mater Misericordiae University Hospital

Dublin, , Ireland

Site Status

University Hospital Galway

Galway, , Ireland

Site Status

Leiden University Medical Center

Leiden, , Netherlands

Site Status

St. Antonius Ziekenhuis

Nieuwegein, , Netherlands

Site Status

Universitair Medisch Centrum

Utrecht, , Netherlands

Site Status

John Paul II Hospital

Krakow, , Poland

Site Status

Uniwersytecki Szpital Kliniczny w Poznaniu

Poznan, , Poland

Site Status

Medical University of Warsaw

Warsaw, , Poland

Site Status

University Hospital Basel

Basel, , Switzerland

Site Status

Centre Hospitalier Universitaire Vaudois

Lausanne, , Switzerland

Site Status

University Hospital Zurich

Zurich, , Switzerland

Site Status

University Hospital of Wales

Cardiff, , United Kingdom

Site Status

The Royal Free Hospital

London, , United Kingdom

Site Status

Northwick Park Hospital

Middlesex, , United Kingdom

Site Status

Countries

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United States Austria France Germany Ireland Netherlands Poland Switzerland United Kingdom

References

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Reference Type DERIVED
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Other Identifiers

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S2479

Identifier Type: -

Identifier Source: org_study_id

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