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Thrombectomy Device as Adjunctive Reperfusion Modality in ST-segment Elevation Myocardial Infarction (NATURE) (NATURE)

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ClinicalTrials.gov Identifier: NCT04969471
Recruitment Status : Recruiting
First Posted : July 20, 2021
Last Update Posted : January 18, 2023
Information provided by (Responsible Party):

Brief Summary:
This study is designed to compare the safety and effectiveness of blood clot (thrombus) removal in subjects presenting with ST-segment elevation myocardial infarction (STEMI) with the enVast coronary system versus conventional intervention.

Condition or disease Intervention/treatment Phase
Segment Elevation Myocardial Infarction (STEMI) Device: enVast stent Procedure: conventional treatment Not Applicable

Detailed Description:
A prospective, multi-center, randomized clinical trial designed to assess the safety and effectiveness of the enVast coronary thrombectomy system as an adjunctive measure to conventional intervention in subjects presenting with ST-segment elevation myocardial infarction (STEMI).

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 148 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: An Interventional, Prospective, Randomized, Multi-Center, Assessor-Blinded Study Designed to Assess the Safety and Effectiveness of the enVast Coronary Thrombectomy System as an Adjunctive Measure to Conventional Intervention in Subjects Presenting With ST-segment Elevation Myocardial Infarction (STEMI)
Actual Study Start Date : December 9, 2021
Estimated Primary Completion Date : June 2024
Estimated Study Completion Date : December 2024

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Heart Attack

Arm Intervention/treatment
Experimental: Thrombectomy Arm
enVast stent deployed at occlusion site as first measure to obtain reperfusion and withdraw the clot
Device: enVast stent
In addition to conventional treatment, the treating physician will deploy as the first measure to obtain reperfusion, a enVast stent at the occlusion site in order to withdraw the clot.

Experimental: Conventional Treatment Arm
Treatment strategies may include balloon angioplasty, manual aspiration thrombectomy and/or coronary stenting.
Procedure: conventional treatment
Treatment strategies may include balloon angioplasty, manual aspiration thrombectomy and/or coronary stenting.

Primary Outcome Measures :
  1. Infarct size [ Time Frame: three days post intervention ]
    size assessed by measurements of creatine kinase

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Age ≥ 18 years
  2. Chest pain for > 20 min with an electrocardiographic ST-segment elevation ≥ 1 mm in two or more contiguous electrocardiogram (ECG) leads or an infero-lateral myocardial infarction (MI) with ST segment depression of ≥ 1 mm in ≥ 2 of leads V1-3 with a positive terminal T wave.
  3. TIMI Thrombus Grade ≥ 3 in the infarct related artery. In cases where TIMI Thrombus Grade is equal to 5 (i.e. TIMI 0 flow in the infarcted artery), TIMI Thrombus Grade of at least 3 has to be re-confirmed with AWI. Patients showing TIMI Thrombus Grade of less than 3 upon AWI are no longer eligible for randomization.
  4. Start of intervention within 8 h of symptom onset
  5. Subject is willing and able to provide informed consent prior to the intervention

Exclusion Criteria:

  1. Unconscious patients
  2. Infarct related artery diameter, at visual assessment, smaller than 2.5 mm
  3. Presence of severely calcified plaque(s) proximal to or at the site of the culprit lesion(s)
  4. Presence of extreme vessel tortuosity proximal to or at the site of the culprit lesion(s)
  5. Women of child-bearing potential (e.g. below 55 years of age, who have not undergone tubal ligation, ovariectomy or hysterectomy and last menstruation within the last 12 months)
  6. Stent thrombosis as culprit lesion
  7. Previous myocardial infarction in the same territory (i.e. same target vessel)
  8. Participation in another interventional clinical trial

Information from the National Library of Medicine

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): NCT04969471

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Contact: Antoine Cuijpers +31 6 51 55 99 37 acuijpers@vesalio.com

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Istituto Cardiocentro Ticino Recruiting
Lugano, Switzerland
Sponsors and Collaborators
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Responsible Party: Vesalio
ClinicalTrials.gov Identifier: NCT04969471    
Other Study ID Numbers: VS-008
First Posted: July 20, 2021    Key Record Dates
Last Update Posted: January 18, 2023
Last Verified: January 2023

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Myocardial Infarction
ST Elevation Myocardial Infarction
Pathologic Processes
Myocardial Ischemia
Heart Diseases
Cardiovascular Diseases
Vascular Diseases