Electrically Guided Bachmann's Bundle Pacing: A Lead Placement Strategy With Potential Antiarrhythmic Benefits

March 8, 2022 updated by: Margaret Infeld, University of Vermont

Electrically Guided Bachmann's Bundle Pacing Pilot Study: A Novel Lead Placement Strategy With Potential Antiarrhythmic Benefits

Despite identification of optimal ventricular pacing sites, which not only avoid dyssynchronous activation but can restore ventricular synchrony, optimal atrial pacing sites have not yet been identified. Specialized conduction tracts do not exist in the atria as they do in the ventricle. Activating the atria in a manner that preserves or improves interatrial synchrony may provide clinical benefit based on recent data. Prior site-selective right atrial septal pacing (RAS) pacing studies relied on non-specific fluoroscopic guidance during lead placement. These studies were limited by the lack of an electrogram target and electrical measures of successful atrial resynchronization. The goal of this study is to prospectively evaluate Bachmann's bundle lead placement guided by fluoroscopy and electrical markers (an endocardial electrogram target and paced P-wave criteria) and determine its anti-arrhythmic efficacy compared with right atrial appendage (RAA) pacing. Patients presenting for pacemaker placement with an indication for an atrial lead are randomized to either electrically-guided BB lead placement or RAA lead placement and then followed for 15 months.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
80

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Vermont
      • Burlington, Vermont, United States, 05401
        • University of Vermont Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Subject is >18 years old
  • Subject is referred for permanent pacemaker implantation with an indication for an atrial lead
  • Subject has either paroxysmal atrial fibrillation or baseline intra-atrial conduction delay (P-wave duration >120ms on a 12-lead ECG)
  • Subject is expected to remain available for standard-of-care pacemaker follow-up visits and study questionnaires

Exclusion Criteria:

  • Subject has permanent atrial fibrillation or is in atrial fibrillation in the pre-operative area prior to the procedure (inability to assess paced P-wave morphology)
  • Subject has pacemaker implantation prior to planned atrioventricular nodal ablation
  • Subject has resting spontaneous sinus rate >85 beats-per-minute
  • Subject has left ventricular ejection fraction <45%
  • Subject is unable or unwilling to complete baseline or follow up quality of life questionnaires
  • Subject is currently enrolled in a potentially confounding trial
  • Subject is pregnant
  • Subject's anticipated life expectancy is less than 1 year

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Bachmann's bundle area pacing
Lead placement in Bachmann's bundle area
Procedure: Bachmann's bundle lead placement
Atrial lead placement at Bachmann's bundle area
Active Comparator: Right atrial appendage pacing
Lead placement in the right atrial appendage
Procedure: Right atrial appendage lead placement
Atrial lead placement in the right atrial appendage

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Atrial arrhythmia burden from pacemaker counters
Time Frame: Over 15 month follow up
Derived from pacemaker counters and expressed as the average percentage of time per day in atrial fibrillation/tachycardia.
Over 15 month follow up

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in P-wave duration from sinus P-wave to paced P-wave in Bachmann's bundle and right atrial appendage lead groups
Time Frame: At implant
At implant
Atrial lead procedure time
Time Frame: At implant
At implant
Atrial lead fluoroscopy time
Time Frame: At implant
At implant
Atrial lead complications
Time Frame: Over 15 month follow up
Over 15 month follow up
Atrial lead capture threshold (Volts)
Time Frame: Over 15 month follow up
Over 15 month follow up
Atrial lead sensing threshold (millivolts)
Time Frame: Over 15 month follow up
Over 15 month follow up
Atrial lead impedance threshold (Ohms)
Time Frame: Over 15 month follow up
Over 15 month follow up
Atrial Fibrillation Severity Scale Version 2.0
Time Frame: Over 15 month follow up

Change in quality of life. The Atrial Fibrillation Severity Scale (AFSS) is composed of 19 items investigating four domains:

  1. AF burden (comprised of AF frequency + AF duration + AF severity): score range is 3-10, higher score = greater burden
  2. Health care utilization: score range is 0-7 for each question, higher score = more utilization
  3. Symptoms: score range is 0-35, higher score = greater symptom severity
  4. Global well-being: score range is 1-10, higher score = better quality of life
Over 15 month follow up
EQ-5D-3L survey (*EQ-5D-3L is the name of the instrument and is not an acronym)
Time Frame: Over 15 month follow up
Change in quality of life. The EQ-5D-3L is a standardized instrument to assess generic health-related quality of life and contains questions on five dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. For each of the five dimension, respondents are offered three response categories (no problems, some problems, extreme problems), leading to 243 possible health states. These health states are then converted into index based values (utilities) ranging from 0 to 1 by applying a valuation algorithm. The EQ-5D instrument includes a visual analogue scale (VAS), on which the patient is asked to score his/her current health state between 0 (worst imaginable health state) and 100 (best imaginable health state).
Over 15 month follow up
Hospitalization or urgent outpatient visit for atrial fibrillation
Time Frame: Within 15 months follow-up post pacemaker
Within 15 months follow-up post pacemaker
Hospitalization or urgent outpatient visit for heart failure
Time Frame: Within 15 months follow-up post pacemaker
Within 15 months follow-up post pacemaker
Cerebrovascular accident
Time Frame: Within 15 months follow-up post pacemaker
Within 15 months follow-up post pacemaker
Atrial Fibrillation Ablation
Time Frame: Within 15 months follow-up post pacemaker
Within 15 months follow-up post pacemaker
New start or up-titration of medications for the primary diagnosis of atrial fibrillation
Time Frame: Within 15 months follow-up post pacemaker
Within 15 months follow-up post pacemaker

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Vermont

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 28, 2021

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2023

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 1, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 15, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 27, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 10, 2021

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 9, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 8, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2022

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 00001532

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

IPD Plan Description

De-identified data upon reasonable request

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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