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Targeted Ablation to Isolate Scar Channels Causing Ventricular Tachycardia

8 september 2026 bijgewerkt door: New York Medical College

Segmental Substrate Isolation for the Treatment of Ventricular Tachycardia in Patients With Structural Heart Disease

The goal of this study is to map conducting channels within scar that cause ventricular tachycardia (VT) in patients with scar in their hearts in order to block these channels from causing VT with targeted radiofrequency ablation (cautery).

Participants undergoing VT ablation mapping of these channels by pacing many sites within the scar area and determining where these channels exit the scar into normal tissue. These exits will be ablated. Immediate success and success at 1 year will be evaluated.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Procedure: Selective Substrate Isolation

Gedetailleerde beschrijving

After standard VT induction and mapping procedures (noninvasive identification of induced VT exit sites with Vektor vMap; substrate mapping; initial pacemapping), the study will consist of pacing within the substrate and mapping all channel exits both noninvasively with vMap as well as invasively with high density mapping catheters within the heart by escape mapping (all paced sites creating a consistent paced morphology, up to the shortest stimulus-to-QRS interval achieved) as well as focal activation mapping of this channel exit while pacing within the channel. The noninvasive map will aid in focusing invasive mapping to a small area of the substrate. Once the exit sites are determined, ablation energy will be delivered based on the mapped exit sites in the substrate channel within 0.5cm of the exit with the goal of blocking each exit site mapped. After the ablation lesion set is delivered, repeat attempt to induce VT will be performed. If more VT is induced, additional ablation energy will be delivered guided by standard mapping techniques (substrate, slow conduction zones, pacemapping).

Studietype

Observationeel

Inschrijving (Geschat)

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

Verenigde Staten
- New York
  - Valhalla, New York, Verenigde Staten, 10595
    - Werving
    - Westchester Medical Center
    - Onderonderzoeker:
      
      Daniel Frenkel, MD
    - Contact:
      
      Jason T Jacobson, MD
      
      Telefoonnummer: 9144935314
      
      E-mail: Jason.Jacobson@wmchealth.org
    - Contact:
      
      Sei Iwai, MD
      
      Telefoonnummer: 9149096900
      
      E-mail: Sei.Iwai@wmchealth.org
    - Hoofdonderzoeker:
      
      Jason Jacobson, MD
    - Onderonderzoeker:
      
      Sei Iwai, MD

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

Volwassen
Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Bemonsteringsmethode

Niet-waarschijnlijkheidssteekproef

Studie Bevolking

Patients presenting to Westchester medical Center for ablation of VT with structural heart disease

Beschrijving

Inclusion Criteria:

Patients with structural heart disease undergoing VT ablation

Exclusion Criteria:

Unable or unwilling to sign consent
Cardiogenic shock or NYHA Class IV heart failure and not a candidate for mechanical circulatory support for the procedure (percutaneous left ventricular assist device (LVAD), extracorporeal membrane oxygenation, or implanted LVAD)
Absence of substrate during initial voltage mapping

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat	Maatregel Beschrijving	Tijdsspanne
Number of participants achieving substrate Isolation with ablation of exit sites Tijdsspanne: Perioperative/Periprocedural: This will be measured at the end of the study ablation procedure only.	Inability to stimulate the ventricle (physiologic parameter) while pacing in the substrate area contained by the ablation lines through each pacemap exit, at sites that were able to stimulate the ventricle prior to ablation. This will be manifest by the absence of a QRS complex resultant from the pacing stimulus. This is a	Perioperative/Periprocedural: This will be measured at the end of the study ablation procedure only.

Secundaire uitkomstmaten

Uitkomstmaat	Maatregel Beschrijving	Tijdsspanne
VT invasive map exit and vMap exit match Tijdsspanne: Perioperative/Periprocedural: This will be measured throughout the study ablation procedure.	Percent matching of VT exits determined by activation/entrainment/pace mapping for matched ECG morphologies with vMap determined exits	Perioperative/Periprocedural: This will be measured throughout the study ablation procedure.
Channel exit and vMap match Tijdsspanne: Perioperative/Periprocedural: This will be measured throughout the study ablation procedure.	Percent matching of noninvasively mapped exit sites compared with invasively mapped channel exits	Perioperative/Periprocedural: This will be measured throughout the study ablation procedure.
Inducibility post initial ablation Tijdsspanne: Perioperative/Periprocedural: This will be measured during the study ablation procedure, after the first set of radiofrequency lesions is placed based in initial mapping.	VT inducibility after first lesion sets determined by channel mapping	Perioperative/Periprocedural: This will be measured during the study ablation procedure, after the first set of radiofrequency lesions is placed based in initial mapping.
1 year outcome Tijdsspanne: 1 year: This will be measured for each subject up to 1 year after the study procedure.	VT recurrence at 1 year determined by therapies delivered by implantable cardioverted defibrillator and presentation with sustained VT below ICD detection.	1 year: This will be measured for each subject up to 1 year after the study procedure.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

New York Medical College

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

27 maart 2025

Primaire voltooiing (Geschat)

9 december 2027

Studie voltooiing (Geschat)

9 december 2028

Studieregistratiedata

Eerst ingediend

17 juni 2025

Eerst ingediend dat voldeed aan de QC-criteria

8 september 2026

Eerst geplaatst (Werkelijk)

10 september 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)