Peripheral Systemic Thrombolysis Versus Catheter Directed Thrombolysis for Submassive PE
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|ClinicalTrials.gov Identifier: NCT03581877|
Recruitment Status : Completed
First Posted : July 10, 2018
Last Update Posted : March 21, 2023
|Condition or disease||Intervention/treatment||Phase|
|Pulmonary Embolism Pulmonary Hypertension Thromboembolism Right Ventricular Dysfunction||Drug: Alteplase Device: EKOS||Phase 4|
Acute pulmonary embolism (PE) is a life-threatening event associated with high morbidity and mortality. With more than 100,000 deaths per year, PE constitutes the third most common cardiovascular cause of death following myocardial infarction and stroke. In non massive PE, anticoagulation is the treatment of choice. Advanced treatment options such as systemic thrombolysis in submassive and massive PE help reduce mortality but unfortunately are associated with bleeding complications such as a 2 to 5% risk of hemorrhagic stroke.This has led to development of pharmaco-mechanical therapies such as catheter directed thrombolysis (CDT).
Current guidelines advocate against the use of full dose systemic thrombolysis for acute submassive PE in all patients unless the bleeding risk is very low. CDT has shown efficiency in reducing right ventricular strain and pulmonary hypertension without increasing bleeding complications in trial populations. Ultrasound assisted CDT (ACDT) is an established treatment modality for acute PE which utilizes high frequency low power ultrasonic waves. It is FDA approved for sub-massive and massive pulmonary embolism. However, ultrasound does not breakdown the thrombus itself but increases the permeability for thrombolytic drugs. The ULTIMA trial showed ACDT was superior to anticoagulation treatment in reducing pulmonary hypertension (PH) and right ventricular dilatation in submassive and massive PE. The trial also reported no intracranial hemorrhage. The exact benefit and mechanism of ACDT in dissolving clots is still not clear. Recently, the PERFECT registry described 100 patients who underwent CDT (64%) and ACDT (46%) for PE, the study showed no difference in reduction of pulmonary artery pressures.
ACDT requires the placement of catheters in the pulmonary arteries in a catheterization laboratory by an interventional cardiologist/radiologist through the internal jugular vein/femoral vein and catheters are kept for 12-24 hrs to infuse recombinant tissue plasminogen activator (r-tpa). While many healthcare systems have developed a pulmonary embolism response team (PERT) to make a prompt therapeutic decision in submassive and massive pulmonary embolism management. However, it is not uncommon for CDT to be delayed (sometimes > 12 hours) after the initial diagnosis due to the availability of the interventional cardiologist. Furthermore, placement of pulmonary catheters in CDT can have the risk, albeit low, of pulmonary vasculature injury.
The investigators hypothesize that low dose thrombolytic therapy can be administered through a peripheral vein. PLST is rapidly administrable and does not require placement in a catheterization laboratory by an interventional cardiologist. In addition, the use of low dose r-tpa reduces risk of major bleeding complications. The investigators aim to see if equivalent low dose r-tpa given peripherally i.e PLST is non-inferior to ACDT for the treatment of submassive PE. Both treatments will be compared in safety, efficacy and overall cardiopulmonary function.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||31 participants|
|Intervention Model:||Parallel Assignment|
|Intervention Model Description:||This study will be a prospective randomized interventional study. Patients referred to Southside hospital will be consented to take part in the study. After obtaining written informed consent, investigators will subsequently enroll 158 consecutive patients (aged> 18 years) randomized in a serial 1:1 allocation for either low dose PLST or ACDT for submassive pulmonary embolism.|
|Masking:||None (Open Label)|
|Official Title:||Peripheral Low Dose Systemic Thrombolysis Versus Catheter Directed Acoustic Pulse Thrombolysis for Treatment of Submassive Pulmonary Embolism|
|Actual Study Start Date :||January 28, 2019|
|Actual Primary Completion Date :||March 19, 2023|
|Actual Study Completion Date :||March 19, 2023|
Experimental: Peripheral low dose thrombolysis
Peripheral low dose thrombolysis will use a peripheral vein into an arm as in routine intravenous therapy. This is the experimental arm. Alteplate (R-tpa) belong to thrombolytic or fibrnolytic drug class. Routine hospital policies for peripheral venous therapy will be used. A fixed dose of 24 mg of Activase (Atleplase) over 12 hours or 2.0 mg/hr will be administered peripherally. Simultaneously, intravenous unfractionated heparin will be given with a target partial thromboplastin time of 40 to 60 secs.
As stated before, low dose r-tpa will be administered through a peripheral vein for PLST.
Other Name: Peripheral low dose systemic thrombolysis (PLST)
Active Comparator: Catheter directed acoustic thrombolysis
For ACDT, routine hospital protocols and EKOS(generic) will be used. EKOS is made up of 3 parts which include the drug delivery pulmonary artery catheter, a removable microsonic device, and a reusable Eko-Sonic control unit. Venous access will be obtained by ultrasound guidance in the internal jugular vein or femoral vein. After catheter placement, the right heart pressures will be measured. R-tpa will be directly given into the pulmonary catheter. A fixed dose of 24 mg of tpa over 12 hours or 2.0mg/hr will be given. For unilateral PE, a single catheter will be used with infusion rate of 2 mg//hr and two catheters will be used for bilateral PEs each with 1 mg /hr infusion rate. Intravenous unfractionated heparin will be given with a target partial thromboplastin time of 40 to 60 secs.
As stated before, the EKos device will be used for ultrasound assisted catheter directed thrombolysis or ACDT, same dose t-tpa will administered through the pulmonary catheter. It will be given at a fixed dose over 24 hours.
Other Name: Ultrasound assisted catheter directed thrombolysis (ACDT)
- Right ventricle (RV) to Left ventricle (LV) ratio [ Time Frame: 48 hours ]Investigators will measure and compare the change between baseline and 48 hours right ventricular diameter to left ventricular diameter (RV:LV ratio) on echocardiogram after PLST or ACDT
- Pulmonary pressures [ Time Frame: 48 hours ]Investigators will measure and compare the change between baseline and 48 hours pulmonary pressures (mm Hg) with echocardiogram following therapy with PLST or ACDT therapy.
- Mortality [ Time Frame: 30 days ]Composite of all-cause mortality and fatal bleeding in-hospital and at 30-day
- Right ventricle (RV) to Left ventricle (LV) ratio [ Time Frame: 30 days ]Investigators will measure and compare the change between baseline and 30 days right ventricular diameter to left ventricular diameter (RV:LV ratio) on echocardiogram after PLST or ACDT
- Pulmonary pressures [ Time Frame: 30 days ]Investigators will measure and compare the change between baseline and 30 days pulmonary pressures (mm Hg) with echocardiogram following therapy with PLST or ACDT therapy.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03581877
|United States, New York|
|Southside Northwell Hospital|
|Bay Shore, New York, United States, 11706|
|Long Island Jewish Medical Center|
|Queens, New York, United States, 11040|
|Principal Investigator:||Azhar Supariwala, MD||Southside Northwell Hospital|