Denna sida har översatts automatiskt och översättningens korrekthet kan inte garanteras. Vänligen se engelsk version för en källtext.

Targeted Ablation to Isolate Scar Channels Causing Ventricular Tachycardia

8 september 2026 uppdaterad av: 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.

Studieöversikt

Status

Rekrytering

Betingelser

Intervention / Behandling

Procedur: Selective Substrate Isolation

Detaljerad beskrivning

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).

Studietyp

Observationell

Inskrivning (Beräknad)

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

Förenta staterna
- New York
  - Valhalla, New York, Förenta staterna, 10595
    - Rekrytering
    - Westchester Medical Center
    - Underutredare:
      
      Daniel Frenkel, MD
    - Kontakt:
      
      Jason T Jacobson, MD
      
      Telefonnummer: 9144935314
      
      E-post: Jason.Jacobson@wmchealth.org
    - Kontakt:
      
      Sei Iwai, MD
      
      Telefonnummer: 9149096900
      
      E-post: Sei.Iwai@wmchealth.org
    - Huvudutredare:
      
      Jason Jacobson, MD
    - Underutredare:
      
      Sei Iwai, MD

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

Vuxen
Äldre vuxen

Tar emot friska volontärer

Nej

Testmetod

Icke-sannolikhetsprov

Studera befolkning

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

Beskrivning

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

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Vad mäter studien?

Primära resultatmått

Resultatmått	Åtgärdsbeskrivning	Tidsram
Number of participants achieving substrate Isolation with ablation of exit sites Tidsram: 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.

Sekundära resultatmått

Resultatmått	Åtgärdsbeskrivning	Tidsram
VT invasive map exit and vMap exit match Tidsram: 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 Tidsram: 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 Tidsram: 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 Tidsram: 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.

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

New York Medical College

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

27 mars 2025

Primärt slutförande (Beräknad)

9 december 2027

Avslutad studie (Beräknad)

9 december 2028

Studieregistreringsdatum

Först inskickad

17 juni 2025

Först inskickad som uppfyllde QC-kriterierna

8 september 2026

Första postat (Faktisk)

10 september 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)