- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT07573579
Dynamic Voltage Mapping to Personalise the Ventricular Tachycardia Substrate (DYNAMITE-VT)
Ventricular tachycardia (VT) is a life-threatening heart rhythm disorder and one of the commonest causes of heart-related sudden death. It often affects people who have had a heart attack or other structural heart damage. VT occurs when abnormal electrical circuits develop within and around scar tissue in the heart.
People at risk are usually offered an implantable cardiac defibrillator (ICD), a device that can detect VT and deliver a lifesaving shock. While effective, these shocks can be sudden, painful and distressing. Medications such as amiodarone can also help, but they are often unsuitable for long-term use due to their potential side effects on the liver, lungs and thyroid gland.
An alternative is catheter ablation. Thin tubes (catheters) are threaded from a blood vessel in the groin to the heart, allowing the cardiologist to identify scar tissue and abnormal electrical circuits, which can be destroyed using heat, freezing or electrical energy.
Although ablation can help many patients, VT can return in up to one in three people after the procedure. This is because it can be difficult to precisely identify the scar and surrounding tissue that sustain the abnormal circuits, making it challenging to know exactly where to apply ablation treatment.
Dynamic Voltage Mapping, is a technique which the investigators believe can more accurately identify scar and the critical bordering tissue during ablation. Initial data collected suggests that the approach accurately predicts the VT circuit and helps guide ablation.
In this study, the investigators wish to recruit 40 participants undergoing VT ablation to determine how effective Dynamic Voltage Mapping is in real-world procedures.
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
Studientyp
Einschreibung (Geschätzt)
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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Liverpool, Vereinigtes Königreich, L14 3PE
- Liverpool Heart and Chest Hospital NHS Foundation Trust
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Kontakt:
- Vishal Luther, MRCP PhD ECES ECDS
- Telefonnummer: 0151 600 1251
- E-Mail: vishal.luther@lhch.nhs.uk
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Kontakt:
- Justin Chiong, MBChB MSc MRCP
- E-Mail: justin.chiong@lhch.nhs.uk
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Hauptermittler:
- Vishal Luther, MRCP PhD ECES ECDS
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Unterermittler:
- Justin Chiong, MBChB MSc MRCP
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
Inclusion Criteria:
- Scheduled for clinically indicated VT ablation (due to sustained VT episodes or ICD therapies).
- Willing and able to give informed consent for participation in the trial
- Male or female aged between 18-85
- Ischaemic and non-ischaemic cardiomyopathy
- ICD insitu
Exclusion Criteria:
- Unable or unwilling to consent
- NYHA Class IV (end stage heart failure)
- Metastatic cancer
- End stage renal disease
- Pregnant or breast feeding
- Severe frailty
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Keine (Offenes Etikett)
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
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Experimental: Dynamic Voltage Mapping Guided Ablation
Patients assigned to this group will have Dynamic Voltage Maps available for the operator to view during the procedure to help guide ablation.
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Dynamic Voltage Mapping uses electrical information collected from catheters positioned within the heart to create an individualised map of the heart, which the investigators hypothesise will better identify scar and surrounding tissue responsible for ventricular tachycardia.
Andere Namen:
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Aktiver Komparator: Standard of Care Ablation
Patients assigned to this group will receive standard of care ablation, and operators will be blinded to Dynamic Voltage Maps created during the procedure.
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Standard catheter ablation of ventricular tachycardia, guided by operator preference
Andere Namen:
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Study Feasibility
Zeitfenster: From enrolment to end of follow up (1 year after procedure)
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From enrolment to end of follow up (1 year after procedure)
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Procedural Time
Zeitfenster: From start of procedure to end (skin-to-skin)
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Measured in minutes
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From start of procedure to end (skin-to-skin)
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Ablation time/number of lesions
Zeitfenster: From start of procedure to end (skin-to-skin)
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Measured by number of ablation lesions applied
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From start of procedure to end (skin-to-skin)
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Acute VT non-inducibility
Zeitfenster: From start of procedure to end (skin-to-skin)
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Ability to induce clinical VT at the end of the procedure
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From start of procedure to end (skin-to-skin)
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VT recurrence Rate
Zeitfenster: From end of procedure to end of follow up (12 months)
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Number of sustained VT episodes/ICD shocks/therapies following procedure, recorded by implanted cardiac device
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From end of procedure to end of follow up (12 months)
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Mitarbeiter und Ermittler
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- Grade Santos J, Mills MT, Calvert P, Worthington N, Phenton C, Modi S, Ashrafi R, Todd D, Waktare J, Mahida S, Gupta D, Luther V. Delineating postinfarct ventricular tachycardia substrate with dynamic voltage mapping in areas of omnipolar vector disarray. Heart Rhythm O2. 2024 Feb 27;5(4):224-233. doi: 10.1016/j.hroo.2024.02.006. eCollection 2024 Apr.
- Khanra D, Calvert P, Hughes S, Waktare J, Modi S, Hall M, Todd D, Mahida S, Gupta D, Luther V. An approach to help differentiate postinfarct scar from borderzone tissue using Ripple Mapping during ventricular tachycardia ablation. J Cardiovasc Electrophysiol. 2023 Mar;34(3):664-672. doi: 10.1111/jce.15766. Epub 2023 Jan 12.
- Mills MT, Calvert P, Chiong J, Gupta D, Luther V. Dynamic Voltage Mapping of the Post-infarct Ventricular Tachycardia Substrate: A Practical Technique to Help Differentiate Scar from Borderzone Tissue. Arrhythm Electrophysiol Rev. 2024 Oct 14;13:e16. doi: 10.15420/aer.2024.26. eCollection 2024.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Primärer Abschluss (Geschätzt)
Studienabschluss (Geschätzt)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Erkrankung des Herzleitungssystems
- Herz-Kreislauf-Erkrankungen
- Pathologische Prozesse
- Herzkrankheiten
- Arrhythmien, Herz
- Tachykardie
- Pathologische Zustände, Anzeichen und Symptome
- Tachykardie, ventrikulär
- Therapeutika
- Chirurgische Eingriffe, operativ
- Ablationstechniken
- Radiofrequenzablation
- Hochfrequenztherapie
- Katheterablation
Andere Studien-ID-Nummern
- 35371
- FS/CRTF/25/24865 (Andere Zuschuss-/Finanzierungsnummer: British Heart Foundation)
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- ANALYTIC_CODE
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