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NHLBI SESAME (SEptal Scoring Along Midline Endocardium) Multi-Center Prospective Study Using Improvised Off-Label Devices

17. september 2026 opdateret af: National Heart, Lung, and Blood Institute (NHLBI)

This is an early study of a catheter-based minimally invasive procedure called SESAME to slice thick heart muscle as described below.

Excessively-thick heart muscle can cause serious heart disease, especially heart failure with preserved ejection fraction, which causes shortness of breath and heart failure symptoms such as edema (swelling) and pulmonary congestion (lung water). Specific circumstances of excessively-thick heart muscle can block outflow of blood from the main heart pumping chamber (left ventricle).

We developed a catheter technique called SESAME (SEptal Scoring Along Midline Endocardium) to slice the excessively-thick heart muscle causing such problems. SESAME can be used in patients who have symptoms related to excessively-thick heart muscle in a part of the heart that restricts blood ejection from the heart; the problem is called "left ventricular outflow tract obstruction (LVOTO)." One group of patients who might benefit from SESAME suffer from a common inherited heart muscle disease called "hypertrophic cardiomyopathy (HCM)." Patients with HCM and symptoms from LVOTO can be treated with medications, open heart surgery, or catheter-based destruction of heart muscle in "alcohol septal ablation." If these treatments fail or are not suitable, then SESAME may be an option, because it resembles surgery treatment without open heart surgery.

Other groups of patients that might benefit are those with heart valve diseases, of the mitral or of the aortic valve, or both, along with excessively-thick heart muscle. These patients may be poor candidates for standard surgical valve repair or replacement because of high risk of complications or death. Such patients might be eligible for non-surgical transcatheter mitral valve replacement, either standard or unapproved ("off-label") or research ("investigational"), but are poor candidates because of risk of LVOTO. Moreover, about half have LVOTO making heart valve symptoms worse. Treating the LVOTO alone may improve symptoms enough that heart valve treatment can be delayed or avoided.

This is a sponsor-investigator IDE study of SESAME performed at a small number of centers that have adopted the technique in the practice of medicine, in order better to characterize how well it works and whether it is safe.

Participating centers already perform SESAME in the practice of medicine using improvised, off-label devices. This protocol allows prospective oversight, standardized technique constraints, central imaging review, independent monitoring, and formal safety adjudication. In addition, the investigational protocol does not function as the gatekeeper for access to SESAME.

The investigators are not affiliated with the guidewire manufacturer and do not seek marketing approval or clearance for SESAME.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Cardiac septal reduction therapies - to relieve left ventricular outflow tract obstruction from transcatheter mitral valve replacement or hypertrophic cardiomyopathy - have inherent limitations including dependence on coronary anatomy, high pacemaker implantation rate, and surgical morbidity. We developed a novel transcatheter ventricular myotomy called SEptal Scoring Along the Midline Endocardium (SESAME) that relies on intramyocardial guidewire navigation and transcatheter electrosurgery. SESAME has been performed on hundreds of patients worldwide using improvised (off-label and bedside-modified commercially available) devices. Recent benchtop refinements in SESAME technique, using improvised devices, are predicted to reduce the likelihood of serious complications such as ventricular perforation, iatrogenic ventricular septal defect, and death.

This sponsor-investigator IDE study systematically characterizes the safety and outcomes of SESAME at up to 10 enrolling sites. SESAME is performed as septal reduction therapy in a heterogeneous group of participants, including (1) symptomatic hypertrophic cardiomyopathy with resting or provoked left ventricular outflow obstruction (LVOTO); and (2) severe symptomatic mitral valve disease at high risk of standard heart surgical therapy and requiring later transcatheter mitral valve implantation combined with manifest or potential LVOTO. This study attempts to capture generalizable knowledge from as many patients as possible who undergo SESAME, and to add a limited number of research procedures to characterize the safety and provisional effectiveness of SESAME.

Participating centers already perform SESAME in the practice of medicine using improvised, off-label devices. This protocol allows prospective oversight, standardized technique constraints, central imaging review, independent monitoring, and formal safety adjudication. In addition, the investigational protocol does not function as the gatekeeper for access to SESAME.

The investigators are not affiliated with the guidewire manufacturer and do not seek marketing approval or clearance for SESAME.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

200

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

    • District of Columbia
      • Washington D.C., District of Columbia, Forenede Stater, 20010
        • MedStar Washington Hospital Center
        • Kontakt:
          • Toby Rogers, M.D.
          • Telefonnummer: 202-877-5975
    • Georgia
      • Atlanta, Georgia, Forenede Stater, 30322
        • Emory University Hospital
        • Kontakt:
          • Vasilis Babaliaros, M.D.
          • Telefonnummer: 678-557-4514
        • Kontakt:
    • Massachusetts
      • Boston, Massachusetts, Forenede Stater, 02215
        • Beth Israel Deaconess Medical Center
        • Kontakt:
          • James McCabe, M.D.
          • Telefonnummer: 617-667-8800
    • New York
      • Roslyn, New York, Forenede Stater, 11576
        • St. Francis Hospital & Heart Center
        • Kontakt:
          • Jaffar M Khan, M.D.
          • Telefonnummer: 516-390-9640
      • The Bronx, New York, Forenede Stater, 10461
        • Montefiore Medical Center: Einstein Campus
        • Kontakt:
          • Mohamed Azeem Latib, M.D.
          • Telefonnummer: 718-920-4212
    • Pennsylvania
      • York, Pennsylvania, Forenede Stater, 17403
        • WellSpan York Hospital
        • Kontakt:
          • Christopher G Bruce, M.D.
          • Telefonnummer: 717-851-2441
    • Virginia
      • Charlottesville, Virginia, Forenede Stater, 22908
        • Univ. of Virginia
        • Kontakt:
          • John Saxon, M.D.
          • Telefonnummer: 434-243-1000
      • Roanoke, Virginia, Forenede Stater, 24014

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

  • INCLUSION CRITERIA
  • Adults age >= 21 years
  • Requires left ventricular septal reduction therapy for one of two indications

    1. Obstructive hypertrophic cardiomyopathy with symptomatic left ventricular outflow tract obstruction (30mmHg peak while resting OR 50mmHg peak when provoked); OR
    2. Planned transcatheter mitral valve replacement is feasible but limited by risk for iatrogenic left ventricular outflow tract obstruction, defined on contrast-enhanced CT as skirt-neo-LVOT <200^2
  • Planning to undergo SESAME transcatheter myotomy
  • Septal diastolic thickness on CT as measured by the NHLBI central laboratory before enrollment:

    • For obstructive hypertrophic cardiomyopathy, >=14mm;
    • For transcatheter heart valve replacement, >=12mm

and

  • Intended minimum diastolic residual septal thickness >=6mm

    -Severely symptomatic, any of

  • NYHA Class III or greater
  • Canadian Angina Class CCS III or greater

    • Explicitly chooses investigational SESAME over conventional treatment approaches including

      1. cardiac myosin inhibitor therapy, if eligible (obstructive HCM only);
      2. transcoronary alcohol septal ablation, if eligible; or
      3. surgical left ventricular myotomy and/or myectomy, if eligible
    • Concurrence of the multidisciplinary institutional heart team that the candidate is at high risk for surgical myectomy and that SESAME is an appropriate septal reduction strategy for this candidate.
    • Willing to return for all scheduled follow-up activities, and eligible or able to undergo required protocol and testing

EXCLUSION CRITERIA

  • Does not consent to participate, or unable to consent to participate
  • Pregnant
  • Hemodynamic instability or emergency procedure
  • Mechanical aortic valve
  • eGFR < 30 mL/min/1.73m^2

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: SESAME Arm
The intervention is the SESAME procedure.
The intervention is the SESAME procedure, a catheter-based septal myotomy performed in adults with symptomatic or high-risk LVOT obstruction. It uses off-label Astato XS 20/40 guidewires and the NHLBI LCI electrosurgery timing appliance to create a controlled longitudinal laceration through the hypertrophied interventricular septum under fluoroscopic and echocardiographic guidance, with energy delivery limited to short pulses and cooling intervals to reduce thermal injury; all participants receive the same procedure, with follow-up assessments afterward.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
SESAME Technical Success
Tidsramme: Completion of SESAME procedure
The primary outcome is technical success, defined as the participant being alive and having a successful SESAME laceration, with post-procedure CT showing that the achieved minimum residual septal thickness matches the planned thickness within 20%.
Completion of SESAME procedure
SESAME Safety
Tidsramme: 30 days after SESAME procedure
The primary safety endpoint is freedom at 30 days from all-cause mortality, any stroke (disabling or non-disabling), and major SESAME-related cardiac structural complications requiring intervention, such as iatrogenic ventricular septal defect, aortic or mitral regurgitation, tamponade, or new permanent pacemaker implantation.
30 days after SESAME procedure

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Robert J Lederman, M.D., National Heart, Lung, and Blood Institute (NHLBI)

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

23. september 2026

Primær færdiggørelse (Anslået)

1. marts 2029

Studieafslutning (Anslået)

1. marts 2030

Datoer for studieregistrering

Først indsendt

3. september 2026

Først indsendt, der opfyldte QC-kriterier

4. september 2026

Først opslået (Faktiske)

8. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

17. september 2026

Sidst verificeret

11. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 10002783
  • 002783-H

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ja

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