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Quartet Lead With Defibrillator Multisite Algorithmic Cardiac Resynchronisation Therapy Optimisation

NCT02997670 · Status: WITHDRAWN · Phase: NA · Type: INTERVENTIONAL

Last updated 2020-01-22

No results posted yet for this study

Summary

Cardiac resynchronisation therapy (CRT) improves outcomes and symptoms in selected patients with heart failure. However, around one third of suitable patients do not demonstrate benefit following device implantation when assessed by echocardiography (heart scanning). This group has poorer outcomes.

Response rate can be enhanced by altering timing delays between the pacing leads, but some patients still fail to improve.

Quadripolar left ventricular leads are now widely used in CRT. The lead's four poles increase the number of conformations available to the programmer, allowing multiple vectors to be programmed simultaneously or sequentially. This allows programming to avoid, for example, a patch of scar and find an area that will respond better to pacing. This technique is known as multi-site pacing. CRT is often implanted along with a defibrillator lead in the right ventricle, known as CRT-D. The defibrillator lead offers further combinations for pacing.

Goal of Research To evaluate an algorithm for assessing different multi-site pacing combinations in optimisation of CRT

Outline The investigators will recruit 24 consecutive patients undergoing CRT-D implantation for conventional indications at our hospital. At baseline, patients will undergo echocardiography, exercise testing and assessments of functional ability and quality of life. The device will be implanted as standard. Optimisation will be performed with an algorithm using different vector combinations and assessing the heart's efficiency through echocardiography and invasive pressure monitoring. The pacemaker will be programmed with standard settings. After twelve weeks, the baseline investigations and optimisation algorithm will be repeated and the device programmed according to the maximum efficiency. After a further 12 weeks, the same parameters will be measured to look for improved response to CRT.

Potential Benefit To increase the response rate to cardiac resynchronisation therapy and improve reliability of the technique

Conditions

  • Heart Failure, Systolic

Interventions

OTHER

Algorithmic Cardiac Resynchronisation Therapy Optimisation

Use of a computer algorithm to run through multiple combinations of pacing options in patients who have a Cardiac resynchronisation pacemaker with defibrillator where a quadripolar lead has been implanted. These quadripolar leads offer extra options for pacing locations across the heart, as well as for different combinations and sequences of pacing stimuli.

Sponsors & Collaborators

  • Abbott Medical Devices

    collaborator INDUSTRY

  • Cardiff and Vale University Health Board

    lead OTHER_GOV

Principal Investigators

  • Freya M Lodge, MBBS · Cardiff and Vale University Health Board

  • Zaheer R Yousef, MBBS · Cardiff and Vale University Health Board

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-07-01
Primary Completion
2019-07-01
Completion
2019-07-01

Countries

  • United Kingdom

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02997670 on ClinicalTrials.gov