Collect therapy coil electrograms from insulation breaches study

ISRCTN ISRCTN10583311
DOI https://doi.org/10.1186/ISRCTN10583311
Secondary identifying numbers Version 2, 05 APR 2016
Submission date
28/07/2016
Registration date
17/08/2016
Last edited
31/10/2017
Recruitment status
Stopped
Overall study status
Stopped
Condition category
Circulatory System
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and study aims
An implantable cardioverter defibrillator (ICD) is a small device that is used to treat people with dangerously abnormal heart rhythms. An ICD can give the heart electric pulses or shocks to get the heart rhythm back to normal. The ICD is inserted just under the collar bone and is connected to one or more electrode leads that are placed into the heart through a vein. Lead failures involving the insulation of the high-voltage part of the ICD lead may cause an electrical short during high-voltage shocks, preventing treatment from being delivered. There are currently limited means for detecting these lead failures. The aim of this study is to collect data to try to detect possible high-voltage insulation breaches.

Who can participate?
Participants aged 18 or over who have been implanted with an ICD and whose defibrillator lead has a possible high-voltage insulation breach

What does the study involve?
Participants wear a Holter monitor for up to 24 hours. A Holter monitor is a portable device that is attached to the skin via electrodes and collects data from the ICD. The collected data is used to try to detect possible high-voltage insulation breaches. Participants are followed up for up to 180 days after Holter monitoring to assess the functioning of their leads.

What are the possible benefits and risks of participating?
Participants may benefit if an insulation breach is detected. There are no risks of participating in the study other than possible mild skin irritation from the Holter monitor electrodes.

Where is the study run from?
Asheville Cardiology Associates (USA)

When is the study starting and how long is it expected to run for?
July 2016 to January 2019

Who is funding the study?
Medtronic (USA)

Who is the main contact?
Scott Sarazin

Contact information

Mr Scott Sarazin
Scientific

8200 Coral Sea Street NE, MS: MVS33
Mounds View
55112
United States of America

Study information

Study designProspective non-randomized multi-center post-market feasibility study
Primary study designObservational
Secondary study designFeasibility study
Study setting(s)Other
Study typeDiagnostic
Participant information sheet Not available in web format, please use contact details to request a participant information sheet
Scientific titleCollect therapy coil electrograms from insulATion breaCHes (CATCH) Study: a prospective non-randomized multi-center post-market feasibility study
Study acronymCATCH
Study objectivesThe primary objective of the study is to collect electrogram (EGM) data from subjects with potential insulation breaches in the high-voltage portion of defibrillator leads. This feasibility study is not powered to formally test a hypothesis.
Ethics approval(s)Mission Health Institutional Review Board, 22/06/2016, Ref: 16-06-1578
Health condition(s) or problem(s) studiedImplanted defibrillator lead high-voltage insulation breach
InterventionStudy subjects will wear a telemetry Holter monitor that stores continuous implanted device data for up to 24 hours. The study will be reviewing electrogram (EGM) data collected by the Holter monitor to try and determine potential lead insulation breaches in the high voltage portion of defibrillation leads. The duration of observation is between 2 and 24 hours. Study follow-up is up to 180 days after Holter monitoring to allow physician to determine lead function status.
Intervention typeDevice
Pharmaceutical study type(s)
Phase
Drug / device / biological / vaccine name(s)
Primary outcome measureLead insulation breaches in the high-voltage portion of defibrillation leads, measured using EGM data at any time between the end of Holter monitor use to up to 180 days post-Holter use
Secondary outcome measuresThere are no secondary outcome measures for this study
Overall study start date05/07/2016
Completion date05/01/2019
Reason abandoned (if study stopped)Participant recruitment issue

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexBoth
Target number of participants25
Key inclusion criteria1. Subject (or subject’s legally authorized representative) is willing and able to provide written informed consent
2. Subject is at least 18 years of age (or older, if required by local law)
3. Subject is willing and able to wear a Holter monitor for at least 2 hours and up to 24 hours
4. Subject has been implanted with a Medtronic ICD or CRT-D device
5. Subject’s defibrillator lead has a possible high voltage insulation breach, as suggested by device diagnostics exhibiting any of the following three characteristics:
5.1. Abrupt high voltage impedance decrease (25% decrease in daily impedance from baseline)
5.2. Non-physiologic noise on high voltage EGM
5.3. Less than 50% programmed shock energy delivered
Key exclusion criteria1. Subject has medical conditions that would limit study participation (per physician discretion)
2. Subject is enrolled in one or more concurrent studies that would confound the study results of this study as determined by Medtronic
Date of first enrolment05/07/2016
Date of final enrolment05/01/2019

Locations

Countries of recruitment

  • United States of America

Study participating centre

Asheville Cardiology Associates, PA
28803
United States of America

Sponsor information

Medtronic, Inc. (USA)
Industry

710 Medtronic Parkway
Minneapolis
55432
United States of America

Website www.medtronic.com
ROR logo "ROR" https://ror.org/00grd1h17

Funders

Funder type

Industry

Medtronic
Private sector organisation / For-profit companies (industry)
Alternative name(s)
Medtronic Inc.
Location
United States of America

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot expected to be made available
Publication and dissemination planTo be confirmed at a later date
IPD sharing plan

Editorial Notes

31/10/2017: Internal review.
02/03/2017: The study was stopped on 21/02/2017 due to a participant recruitment issue.