Pilot Study of Hypertrophic Cardiomyopathy & Implantable Cardioverter Defibrillator Assessment: (Subcutaneous vs Transvenous)

NCT ID: NCT05938283

Last Updated: 2025-03-25

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-01-10

Study Completion Date

2026-01-10

Brief Summary

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Pilot randomised trial to assess recruitment for a larger trial to compare the efficacy and adverse effects of the subcutaneous and transvenous ICD in patients with hypertrophic cardiomyopathy (HCM) and indication for ICD therapy, with no requirement for pacing

Detailed Description

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This study aims to test the feasibility of conducting a trial to investigate the use of subcutaneous implantable defibrillator (SICD) in patients with hypertrophic cardiomyopathy (HCM) and to determine whether SICD produces more complications than conventional, transvenous implantable defibrillator (TV ICD).

The primary analysis for the main trial is designed to test whether the S-ICD is non-inferior to the TV-ICD with respect to the primary endpoint of inappropriate shock treatment and complications. For the incidence of the primary endpoint statistical significance and 99% confidence intervals are calculated using Cox' proportional hazards model. Non-inferiority is considered to be established if the upper boundary of the one-sided 99% confidence interval did not exceed 1.92 (absolute difference \< 12%).

Participant duration is expected to be 14 months. (12 months follow up post device implant) Recruitment duration expected to be 6-10 months.

Conditions

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Implantable Defibrillator User Hypertrophic Cardiomyopathy Implantable Cardioverter Ventricular Lead Dysfunction or Complication Ventricular Arrythmia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Pilot randomised control trial, randomised 1:1 for Transvenous: Subcutaneous
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Transvenous Implantable Defibrillator

Routine TV ICD implant

Group Type ACTIVE_COMPARATOR

Implantable Cardioverter Defibrillator implant

Intervention Type DEVICE

ICD implant to protect patients from life threatening ventricular tachycardia or ventricular fibrillation

Subcutaneous Implantable Defibrillator

SICD ICD implant as per study protocol

Group Type ACTIVE_COMPARATOR

Implantable Cardioverter Defibrillator implant

Intervention Type DEVICE

ICD implant to protect patients from life threatening ventricular tachycardia or ventricular fibrillation

Interventions

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Implantable Cardioverter Defibrillator implant

ICD implant to protect patients from life threatening ventricular tachycardia or ventricular fibrillation

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Hypertrophic Cardiomyopathy and a referred for ICD therapy with no pacing requirement.

Exclusion Criteria

* Patients with sustained ventricular tachycardia less than 170 bpm
* Patients having an indication for pacing therapy. E.g. sick sinus syndrome.
* Patients failing appropriate QRS/T-wave sensing with the automated S-ICD ECG automated patient screening provided by Boston Scientific
* A minimum of 1 sensing vector passing in supine, standing.
* Patients with incessant ventricular tachycardia
* Patients who have had a previous ICD implant
* Patient who receives cardiac contractility modulation therapy or are likely to receive cardiac contractility modulation therapy
* Patients with a serious known concomitant disease with a life expectancy of less than one year
* Patients with circumstances that prevent follow-up (no permanent home or address, transient, etc.)
* Patients who are unable to give informed consent
* Patients who are not suitable for TV-ICD implantation, according to the discretion of the physician, are not screened for enrolment (SVC occlusion).
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Boston Scientific Corporation

INDUSTRY

Sponsor Role collaborator

Queen Mary University of London

OTHER

Sponsor Role collaborator

Barts & The London NHS Trust

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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St Bartholomew's Hospital

London, , United Kingdom

Site Status RECRUITING

Countries

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United Kingdom

Central Contacts

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Syed Ahsan, PhD

Role: CONTACT

02074804899

Christopher Monkhouse, BSc

Role: CONTACT

Facility Contacts

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Syed Ahsan, MD

Role: primary

Christopher Monkhouse, BSc

Role: backup

Other Identifiers

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158953

Identifier Type: -

Identifier Source: org_study_id

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