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

3 de noviembre de 2026 actualizado por: 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.

Descripción general del estudio

Estado

Aún no reclutando

Condiciones

Intervención / Tratamiento

Descripción detallada

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.

Tipo de estudio

Intervencionista

Inscripción (Estimado)

200

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

  • Nombre: Robert J Lederman, M.D.
  • Número de teléfono: (301) 402-6769
  • Correo electrónico: robert.lederman@nih.gov

Ubicaciones de estudio

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

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

21 años a 100 años (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

  • 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

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Tratamiento
  • Asignación: No aleatorizado
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: SESAME Arm

The intervention is the SESAME procedure.
Dispositivo: 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.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
SESAME Technical Success
Periodo de tiempo: 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
Periodo de tiempo: 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

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

National Heart, Lung, and Blood Institute (NHLBI)

Investigadores

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

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Estimado)

9 de noviembre de 2026

Finalización primaria (Estimado)

1 de marzo de 2029

Finalización del estudio (Estimado)

1 de marzo de 2030

Fechas de registro del estudio

Enviado por primera vez

3 de septiembre de 2026

Primero enviado que cumplió con los criterios de control de calidad

4 de septiembre de 2026

Publicado por primera vez (Actual)

8 de septiembre de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

4 de noviembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

3 de noviembre de 2026

Última verificación

11 de septiembre de 2026

Más información

Términos relacionados con este estudio

Palabras clave

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • 10002783
  • 002783-H

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

Sí

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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