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Safety and Effectiveness of the Sphere-9™ Catheter and Affera™ Ablation System for the Treatment of Ventricular Tachycardia (Sphere VT)

17. september 2026 oppdatert av: Medtronic Cardiac Ablation Solutions

Safety and Effectiveness of the Sphere-9™ Catheter and Affera™ Ablation System for the Treatment of Ventricular Tachycardia

Sphere VT is a prospective, multi-center, single-arm, unblinded pivotal clinical study. Adult subjects with recurrent, sustained, monomorphic ventricular tachycardia (MMVT) due to prior myocardial infarction (MI) will be enrolled and treated with the Sphere-9 Catheter and Affera Ablation System.

Studieoversikt

Status

Rekruttering

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

260

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studer Kontakt Backup

Studiesteder

  • Forente stater
    • New York
      • Manhasset, New York, Forente stater, 11030-3816
        • Rekruttering
        • Northwell Health Lenox Hill Hospital
        • Ta kontakt med:
    • North Carolina
      • Winston-Salem, North Carolina, Forente stater, 27157-0001
        • Rekruttering
        • Atrium Health Wake Forest Baptist Medical Center
        • Ta kontakt med:
    • Ohio
      • Columbus, Ohio, Forente stater, 43210-1240
        • Rekruttering
        • The Ohio State University Wexner Medical Center
        • Ta kontakt med:
    • Texas
      • Austin, Texas, Forente stater, 78705-1852
        • Rekruttering
        • Texas Cardiac Arrhythmia Research Foundation
        • Ta kontakt med:

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Beskrivelse

Inclusion Criteria:

  1. Prior myocardial infarction (MI).
  2. At least one episode of sustained (continuous for >30 seconds or requiring ICD intervention for termination) monomorphic ventricular tachycardia within the 6 months prior to enrollment.
  3. Recurrence of sustained ventricular tachycardia despite Class I or III antiarrhythmic drug therapy or ICD intervention.
  4. Implanted with an implantable cardiac defibrillator (ICD) or CRT-D for at least 2 months prior to the ablation procedure.
  5. Age 18 through 85 years old.
  6. Willing and able to provide informed consent.
  7. Willing and able to comply with all pre-, post-, and follow-up testing requirements.

Exclusion Criteria:

  1. Incessant VT necessitating hemodynamic support prior to the ablation procedure.
  2. Unstable polymorphic VT or ventricular fibrillation (VF).
  3. Idiopathic VT or VT of non-ischemic cardiomyopathy.
  4. VT secondary to electrolyte imbalance, active thyroid disease, or any other reversible or non-cardiac cause (e.g., drug-induced arrhythmia).
  5. VT or VF thought to be from channelopathies.
  6. More than two prior VT ablations at any time, more than one prior VT ablation within 12 months prior to the ablation procedure, or any VT ablation within 4 weeks prior to the ablation procedure.
  7. Sarcoidosis.
  8. Hypertrophic cardiomyopathy, except when due to an apical aneurysm.
  9. Unstable angina.
  10. Active myocardial ischemia.
  11. Type 1 myocardial infarction within 2 months (60 days) prior to the ablation procedure.
  12. Any percutaneous coronary intervention performed in a setting of unstable angina or acute MI (STEMI or non-STEMI) within 2 months (60 days) prior to the ablation procedure. Note: elective PCI performed during elective angiogram would be excluded only if occurring within 30 days prior to the ablation procedure.
  13. Any cardiac surgery within 2 months (60 days) prior to the ablation procedure. Note: ICD lead implant/replacement falls under this exclusion, but ICD generator-only replacement does not.
  14. Left ventricular ejection fraction (LVEF) <15%.
  15. NYHA Class IV heart failure.
  16. Decompensated heart failure.
  17. Extravascular ICD (EV-ICD) or subcutaneous ICD (S-ICD)
  18. Currently receiving support, or anticipated to receive support prior to the index ablation procedure, via extracorporeal membrane oxygenation (ECMO).
  19. Circulatory/ventricular assist device (VAD; surgical or percutaneous) implanted, planned or required for the procedure.
  20. Severe aortic or mitral stenosis, or severe aortic or mitral regurgitation.
  21. Presence of prosthetic valve in the aortic or mitral valve.
  22. Patients with advanced COPD (on home oxygen).
  23. Presence of intracardiac tumor or other abnormality that precludes vascular access, catheter introduction, or manipulation.
  24. Thromboembolic event (stroke or transient ischemic attack) within 6 months (180 days) prior to the index ablation procedure or with neurologic deficit.
  25. Left atrium (LA) or left ventricle (LV) intracardiac thrombus on imaging.
  26. Severe bleeding, clotting or thrombotic disorder, or thrombocytopenia (defined as platelet count <80,000).
  27. Contraindication to anticoagulation.
  28. End-stage renal disease (requiring dialysis).
  29. Acute illness, active infection, or sepsis.
  30. Life expectancy less than 12 months.
  31. Any woman known to be pregnant or breastfeeding, or any woman of childbearing potential who is not on a reliable form of birth regulation method or abstinence.
  32. Body mass index >45 kg/m2.
  33. Known ongoing drug or alcohol dependency.
  34. Current or anticipated participation in any other ongoing study of a drug, device, or biologic during the duration of the study not pre-approved by the Sponsor.
  35. Vulnerable subjects (such as a prisoner, handicapped or mentally disabled person, or person under tutelage or guardianship).
  36. Any other condition that, in the opinion of the investigator, would preclude enrollment in this study or compliance with follow-up requirements or would pose a significant hazard to the subject if an ablation procedure were performed.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: N/A
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Ventrikulær takykardi-kateterablasjon
Ablasjon ved bruk av Sphere-9-kateteret med Affera Mapping and Ablation System
Enhet: Sphere-9 Catheter with the Affera Mapping and Ablation System
Adult subjects with ventricular tachycardia will be enrolled and undergo ablation with the Sphere-9 Catheter with the Affera Mapping and Ablation System.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Primary Safety
Tidsramme: As applicable, within 7 days or 3 months after the index ablation procedure
A pre-defined list of device- or procedure-related SAEs, as adjudicated by the Clinical Events Committee (CEC), occurring within 7 days after the index ablation procedure (or within 3 months after the index ablation procedure for any esophago-pericardial fistula/esophageal perforation) will be considered a primary safety event.
As applicable, within 7 days or 3 months after the index ablation procedure
Primary Effectiveness
Tidsramme: Through 6 months after the index ablation procedure
Freedom from recurrence of sustained monomorphic VT (MMVT) in the absence of new or increased dose of Class I or III antiarrhythmic drugs (AAD) through 6 months after the index ablation procedure.
Through 6 months after the index ablation procedure

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Medtronic Cardiac Ablation Solutions

Etterforskere

  • Hovedetterforsker: Vivek Reddy, MD, Icahn School of Medicine at Mount Sinai
  • Hovedetterforsker: Pasquale Santangeli, MD, The Cleveland Clinic

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Faktiske)

17. august 2026

Primær fullføring (Antatt)

1. mars 2028

Studiet fullført (Antatt)

1. september 2028

Datoer for studieregistrering

Først innsendt

7. mai 2026

Først innsendt som oppfylte QC-kriteriene

7. mai 2026

Først lagt ut (Faktiske)

14. mai 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

18. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

17. september 2026

Sist bekreftet

1. april 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • Sphere VT

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

NEI

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Ja

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

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