Safety and Efficacy Study of reSept ASD Occluder for Treating Secundum ASD (ASCENT ASD)

Evaluation of the Safety and Efficacy of the reSept ASD Occluder to Treat Patients With Clinically Significant Secundum Atrial Septal Defect

Evaluation of the safety and efficacy of the reSept ASD Occluder to treat patients with clinically significant secundum atrial septal defect

Study Overview

• Status: Active, not recruiting
• Conditions: Heart Diseases; Cardiovascular Diseases; Congenital Abnormalities; Heart Septal Defects, Atrial; Heart Defects, Congenital; Cardiovascular Abnormalities; Heart Septal Defect
• Intervention / Treatment: Device: reSept ASD Occluder

Detailed Description

Prospective, three-stage, single arm, multi-site, clinical investigation evaluating the safety and efficacy of the reSept ASD Occluder in treating clinically significant secundum ASD. Outcomes/endpoints of the clinical investigation will be compared with established performance goals for FDA approved transcatheter secundum ASD occluders.

• Study Type: Interventional
• Enrollment (Estimated): 250
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Canada
  • Toronto, Canada, 6EN-249
    • Toronto General Hospital
• France
  • Bordeaux, France, 33604
    • Hôpital cardiologique Haut-Leveque (CHU Bordeaux)
  • Lille, France, 59000
    • Service de Cardiologie Pédiatrique et Congénitale
  • Nantes, France, 44093
    • Hôpital Mere Enfants (CHU Nantes)
  • Paris, France, 75015
    • Hôpital Necker Enfants Malades
  • Toulouse, France, 31059
    • Hôpital des Enfants (CHU Toulouse)
• Switzerland
  • Lausanne, Switzerland, 1011
    • Centre Hospitalier Universitaire Vaudois (CHUV)
  • Zurich, Switzerland, 8032
    • University Children's Hospital Zurich
• United States
  • Alabama
    • Birmingham, Alabama, United States, 35233
      • University of Alabama at Birmingham
  • California
    • Los Angeles, California, United States, 90027
      • Children's Hospital of Los Angeles
    • Thousand Oaks, California, United States, 91360
      • Los Robles Regional Medical Center
  • Colorado
    • Aurora, Colorado, United States, 80045
      • Children's Hospital Colorado
  • Connecticut
    • New Haven, Connecticut, United States, 06510
      • Yale University
  • Florida
    • Hollywood, Florida, United States, 33021
      • Joe DiMaggio Children's Hospital/Memorial Healthcare System
  • Georgia
    • Atlanta, Georgia, United States, 30322
      • Children's Healthcare of Atlanta
  • Illinois
    • Oak Lawn, Illinois, United States, 60453
      • Advocate Children's Hospital
  • Indiana
    • Indianapolis, Indiana, United States, 46202
      • Riley Hospital for Children
  • Massachusetts
    • Boston, Massachusetts, United States, 02115
      • Boston Children's Hospital
  • Michigan
    • Ann Arbor, Michigan, United States, 48109
      • University of Michigan
    • Detroit, Michigan, United States, 48202
      • Children's Hospital of Michigan
  • Missouri
    • Saint Louis, Missouri, United States, 63110
      • Washington University School of Medicine
  • New York
    • New York, New York, United States, 10029
      • Mount Sinai Medical Center
  • Ohio
    • Cincinnati, Ohio, United States, 45229
      • Cincinnati Children's Hospital
    • Columbus, Ohio, United States, 43215
      • Nationwide Children's Hospital
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19104
      • Children's Hospital of Philadelphia
    • Pittsburgh, Pennsylvania, United States, 15224
      • UPMC Children's Hospital of Pittsburgh
  • South Carolina
    • Charleston, South Carolina, United States, 29425
      • Medical University of South Carolina
  • Texas
    • Dallas, Texas, United States, 75230
      • Medical City Dallas Hospital
    • Houston, Texas, United States, 77030
      • Texas Children's Hospital
  • Utah
    • Salt Lake City, Utah, United States, 84113
      • Primary Children's Hospital
  • Virginia
    • Charlottesville, Virginia, United States, 22908
      • University of Virginia
  • Washington
    • Seattle, Washington, United States, 98105
      • Seattle Children's Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: No older than 84 years (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

All responses must be Yes to be eligible:

1. Age < 85 years.
2. Body weight ≥ 15 kg / 33 lb.
3. Males and Females.
4. Clinically significant, isolated secundum ASD associated with a L-R shunt and signs of RV volume overload that, based upon the expertise of attending physicians requires treatment.
5. ASD of size 5 to 19 mm on screening diagnostic echocardiogram.
6. Isolated secundum ASD of size 8 to 22 mm on stop flow balloon diameter, based upon echocardiographic and fluoroscopic evidence obtained at procedure.
7. Able to take required medications: ASA (Aspirin), low dose (75-100 mg/day), 24 hours prior to and for 6 months following the procedure; Heparin intra-procedurally.
8. Adequate septal rim to support the device. The rim is considered inadequate if it measures less than 5mm in more than two views of a critical structure
9. Adequate defect margin to safely accommodate the selected size implant without interfering with adjacent cardiac structures (e.g., aorta, AV valves, ostia of the pulmonary veins, coronary sinus, or other critical structures), based on the IFU sizing guidance.
10. Capable of giving informed consent, or, for minors, consent of the parent or legal guardian, and willing to comply with the clinical investigation requirements.

Exclusion Criteria:

All responses must be No to be eligible:

1. Pregnancy. Females with child-bearing potential are required to be tested for pregnancy prior to treatment, in accordance with the local institution's policy. For minor females, a pregnancy test will be done in accordance with the local institution's policy.
2. Any significant valve dysfunction that contraindicates ASD closure, or increased pulmonary vascular resistance/severe pulmonary hypertension.
3. Acquired pathological or congenital abnormalities of the cardiovascular system (other than isolated secundum ASD; e.g. congenital malformations, calcification, myocardial infarction, intracardiac thrombi, dilated cardiomyopathy, untreated coronary disease or CAD treated with a stent in the prior 12 months) being clinically significant, that would interfere with the conduct of the clinical investigation.
4. Subjects having undergone left sided structural heart interventions performed via transseptal access (e.g. Mitraclip, LAAO, percutaneous mitral valve replacement).
5. Evidence of thrombus in the left atrium, left atrial appendage, other cardiac chamber, or the inferior vena cava.
6. Sepsis or any other infection that was not successfully treated at least 30 days prior to device placement.
7. Active endocarditis or other infection(s) producing bacteremia.
8. History of atrial tachycardia, atrial fibrillation or flutter, AV block, or ventricular arrhythmia requiring antiarrhythmic medication, pacemaker or AICD.
9. Vasculature is of inadequate size to accommodate all procedural instrumentation.
10. Known allergy to investigational device components or medications, or other contraindication to clinical investigation medications (acetylsalicylic acid, heparin), including a documented history of bleeding, clotting or coagulation disorders, untreated ulcer or any other contraindications to acetylsalicylic acid or antiplatelet therapy.
11. Known hypercoagulable state.
12. Any disorder in the investigator's opinion that could interfere with compliance of safety evaluation as well as any severe concurrent illness that would limit life expectancy (e.g. malignancies).
13. Currently an active subject in an investigational drug or device study that could confound the results of this study.
14. Patients who, in the opinion of the investigator, are inappropriate for inclusion into this clinical investigation or will not comply with requirements of the clinical investigation.
15. Are known to abuse drugs or alcohol.
16. Patients with the diagnosis of Patent Foramen Ovale (PFO).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Device; ASD closure with the reSept ASD Occluder	Device: reSept ASD Occluder; Transcatheter closure of secundum ASD using a permanent implant

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Subjects with 12-Month Composite Clinical Success	Clinically effective ASD closure, defined as no residual ASD or clinically insignificant residual ASD as determined by core laboratory review; and; No re-intervention to treat the defect; and; No device or procedure related serious adverse event.	12 months
Number of Subjects with CEC adjudicated Device- or Procedure-related SAEs	Incidence of subjects experiencing one or more serious device- or procedure related adverse events through the 12 month follow up visit, as adjudicated by the Clinical Events Committee (CEC)	12 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
ASD Closure Success among Technical Success Subjects	Assessment of device performance will include closure success, among subjects that were technical successes (i.e. successful placement and release of the reSept ASD Occluder at the ASD), defined as no residual ASD or clinically insignificant residual ASD determined by echocardiography. Assessment of closure success at each follow up through the 12-month follow up will be assessed by TTE.	1 month, 6 months and 12 months
Number of Subjects with Device- or Procedure-related AEs	Incidence of subjects experiencing one or more non serious device- or procedure-related adverse events through the 12-month follow up visit.	12 months

Collaborators and Investigators

• Sponsor: atHeart Medical
• Investigators: Principal Investigator: Saibal Kar, MD, Los Robles Regional Medical Center; Principal Investigator: Thomas Forbes, MD, Joe DiMaggio Children's Hospital/Memorial Healthcare

Study record dates

Study Major Dates

• Study Start (Actual): March 12, 2021
• Primary Completion (Estimated): March 1, 2027
• Study Completion (Estimated): March 1, 2032

Study Registration Dates

• First Submitted: October 6, 2020
• First Submitted That Met QC Criteria: October 12, 2020
• First Posted (Actual): October 19, 2020

Study Record Updates

• Last Update Posted (Actual): May 7, 2025
• Last Update Submitted That Met QC Criteria: May 5, 2025
• Last Verified: May 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Congenital Abnormalities; Cardiovascular Diseases; Heart Diseases; Heart Defects, Congenital; Heart Septal Defects; Heart Septal Defects, Atrial; Cardiovascular Abnormalities
• Other Study ID Numbers: 008-022

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes