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Targeted Ablation to Isolate Scar Channels Causing Ventricular Tachycardia

8 septembre 2026 mis à jour par: 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.

Aperçu de l'étude

Statut

Recrutement

Les conditions

Intervention / Traitement

Procédure: Selective Substrate Isolation

Description détaillée

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).

Type d'étude

Observationnel

Inscription (Estimé)

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

États-Unis
- New York
  - Valhalla, New York, États-Unis, 10595
    - Recrutement
    - Westchester Medical Center
    - Sous-enquêteur:
      
      Daniel Frenkel, MD
    - Contact:
      
      Jason T Jacobson, MD
      
      Numéro de téléphone: 9144935314
      
      E-mail: Jason.Jacobson@wmchealth.org
    - Contact:
      
      Sei Iwai, MD
      
      Numéro de téléphone: 9149096900
      
      E-mail: Sei.Iwai@wmchealth.org
    - Chercheur principal:
      
      Jason Jacobson, MD
    - Sous-enquêteur:
      
      Sei Iwai, MD

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

Adulte
Adulte plus âgé

Accepte les volontaires sains

Non

Méthode d'échantillonnage

Échantillon non probabiliste

Population étudiée

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

La description

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

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats	Description de la mesure	Délai
Number of participants achieving substrate Isolation with ablation of exit sites Délai: 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.

Mesures de résultats secondaires

Mesure des résultats	Description de la mesure	Délai
VT invasive map exit and vMap exit match Délai: 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 Délai: 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 Délai: 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 Délai: 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.

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

New York Medical College

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

27 mars 2025

Achèvement primaire (Estimé)

9 décembre 2027

Achèvement de l'étude (Estimé)

9 décembre 2028

Dates d'inscription aux études

Première soumission

17 juin 2025

Première soumission répondant aux critères de contrôle qualité

8 septembre 2026

Première publication (Réel)

10 septembre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)