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Heart Failure - NYHA II - IVSYNCHRONICITYNCT07069738

Safety and Effectiveness of Left Bundle Branch Area Pacing Versus Conventional Cardiac Resynchronization Therapy in Heart Failure

A study testing CRT-D with a Quadripolar LV lead and CRT-D with INGEVITY+ pace/sense lead in people with Heart Failure - NYHA II - IV, run by Boston Scientific Corporation at 43 sites in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This study will compare two different methods to pace the heart to treat heart failure including: 1. The current standard method of implanting a pacing lead in a vein on the surface of the left lower chamber of the heart (left ventricle) to deliver heart failure therapy. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Heart Failure - NYHA II - IV
What is being tested?
CRT-D with a Quadripolar LV lead and CRT-D with INGEVITY+ pace/sense lead
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
850 participants
Where
43 sitesUnited States
Study dates
22 Oct 2025to Nov 2029
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patient is age 18 years or above, or of legal age to give informed consent specific to state and national law
  • Patient meets a guideline-based indication for a de novo CRT-D device
  • Primary prevention indication for ICD therapy
  • Ischemic or nonischemic cardiomyopathy with LVEF ≤ 35% within 6 months of enrollment (LVEF must be assessed after the subject has been on GDMT for a minimum of 3 months) using an appropriate method of assessment (i.e. Echo, MRI, etc)
  • NYHA class II-IV despite maximally tolerated guideline directed medical therapy (GDMT)* for at least 3 months
  • GDMT is defined as all four drug classes listed below for at least 3 months prior to enrollment unless the investigator provides justification (e.g., contraindicated, not tolerated or cost): Renin Angiotensin System Inhibitors (ACE, ARB, or ARNI) Evidence based betablockers (metoprolol succinate, carvedilol, bisoprolol) Mineralocorticoid antagonists SGLT2 Inhibitor medications
Show all 10Show fewer
  • Sinus rhythm with left bundle branch block (LBBB) defined as a QRS ≥ 140 ms in men and ≥ 130 ms in women with a predominantly negative deflection (QS or rS in lead V1 and mid QRS notching or slurring in at least two of the following leads: 1, aVL, V1, V2, V5, V6) within 3 months of enrollment
  • Patient is willing to participate in LATITUDE™ NXT remote patient monitoring
  • Patient is willing and capable of providing informed consent and participating in all testing associated with this investigation at an approved study site and at the protocol defined intervals (Note: Use of a legally authorized representative (LAR) is not allowed)
  • Patient plans to remain geographically stable (not permanently moving to another location) and can commit to all study participation requirements (procedure, follow-up visits and testing requirements)

Who cannot join

  • Persistent or permanent atrial fibrillation (AF) within 3 months prior to enrollment and documented in the medical record
  • Frequent premature ventricular contractions (PVCs), atrial arrhythmias, and/or other causes of expected percentage of cardiac physiologic pacing (CPP) delivery below 95% at the time of enrollment
  • Non-LBBB conduction abnormalities (including right bundle branch block (RBB) or intraventricular conduction delay (IVCD)) within 3 months prior to enrollment
  • Complete, second degree or high degree atrioventricular (AV) block, that requires pacing at the time of enrollment
  • Current or prior pacemaker, ICD or CRT implant (Also includes non-transvenous ICD technology and leadless pacemakers)
  • Prior or planned mechanical or bioprosthetic tricuspid valve replacement
Show all 21Show fewer
  • Currently receiving or previously received positive inotrope therapy within 3 months prior to enrollment
  • Unstable angina, acute myocardial infarction, coronary artery bypass grafting, or percutaneous coronary intervention within 3 months prior to enrollment
  • History of heart transplantation or left ventricular assist device (LVAD) implantation
  • Less than 1 year of life expectancy at the time of enrollment
  • Anticipated heart transplantation or LVAD implantation within 1 year of enrollment
  • History of ventricular septal defect (VSD)
  • Complex congenital heart disease
  • Documented diagnosis of cardiac amyloidosis
  • Known occlusion or other reason limiting central venous access for transvenous leads
  • Women of childbearing potential who are, or plan to become, pregnant during the course of the study (assessment per investigator's discretion)
  • Patient currently requiring dialysis
  • Patient with known or suspected sensitivity to Dexamethasone Acetate (DXA)
  • Patient with contrast dye allergy or unwilling/able to undergo pre-treatment with steroids and/or diphenhydramine
  • Inability or refusal to comply with the follow-up schedule including subject living at such a distance from the investigational site that attending follow-up visits would be unusually difficult or burdensome
  • Patient is enrolled in any other concurrent study. Co-enrollment into other studies such as observational studies/registries needs prior written approval by BSC. Local mandatory governmental registries are accepted for co-enrollment without approval by BSC.

Trial locations and contacts

43 sites in 1 country. Contact the study team or a site near you to ask about taking part.

43 sites in 1 country

United States43 sites, 40 recruiting
  • Capital Cardiology Associates

    Albany, New York, 12211

    Rizwan Alimohammad, MD

    Rizwan Alimohammad, MD

    Recruiting
  • University of Michigan Hospitals

    Ann Arbor, Michigan, 48109

    Thomas Crawford, MD

    Thomas Crawford, MD

    Recruiting
  • Piedmont Hospital

    Atlanta, Georgia, 30309

    Kavita Krishnasamy, MD

    Kavita Krishnasamy, MD

    Recruiting
  • Emory University Hospital

    Atlanta, Georgia, 30322

    Anand Shah, MD

    Anand Shah, MD

    Recruiting
  • Sanger Heart and Vascular Institute

    Charlotte, North Carolina, 28204

    Navid Nafissi, MD

    Navid Nafissi, MD

    Recruiting
  • University of Virginia Medical Center

    Charlottesville, Virginia, 22908

    Pamela Mason, MD

    Pamela Mason, MD

    Recruiting
  • OhioHealth Research and Innovation Institute-Riverside Methodist Hospital

    Columbus, Ohio, 43214

    Anish Amin, MD

    Anish Amin, MD

    Recruiting
  • Mount Carmel Health System

    Columbus, Ohio, 43219

    Kamel Addo, MD

    Kamel Addo, MD

    Recruiting
  • St. Mary's Duluth Clinic Regional Heart Center

    Duluth, Minnesota, 55805

    Withdrawn
  • Duke University Medical Center

    Durham, North Carolina, 27710

    Daniel Friedman, MD

    Daniel Friedman, MD

    Recruiting
  • Southcoast Physicians Group

    Fall River, Massachusetts, 02720

    Arnoldas Giedrimas, MD

    Arnoldas Giedrimas, MD

    Recruiting
  • New York Hospital Queens

    Flushing, New York, 11355

    Seth Goldbarg, Dr.

    Seth Goldbarg, Dr.

    Recruiting
  • Corewell Health

    Grand Rapids, Michigan, 49525

    Jawad Wassim, MD

    Jawad Wassim, MD

    Recruiting
  • University of Chicago

    Hinsdale, Illinois, 60521

    Shrinath Yeshwant, MD

    Shrinath Yeshwant, MD

    Recruiting
  • Heart Center Research, LLC

    Huntsville, Alabama, 35801

    John Jennings, Dr.

    John Jennings, Dr.

    Recruiting
  • Community Heart and Vascular Hospital

    Indianapolis, Indiana, 46250

    Krishna Malineni, MD

    Krishna Malineni, MD

    Recruiting
  • University of Iowa Hospitals and Clinics

    Iowa City, Iowa, 52242

    Paari Dominic, MD

    Paari Dominic, MD

    Recruiting
  • Arrhythmia Research Group

    Jonesboro, Arkansas, 72401

    Devi Nair, Dr.

    Devi Nair, Dr.

    Recruiting
  • Scripps Memorial Hospital

    La Jolla, California, 92037

    Nicolas Olson, MD

    Nicolas Olson, MD

    Recruiting
  • Cedars Sinai Medical Center

    Los Angeles, California, 90048

    Ashkan Ehdaie, MD

    Ashkan Ehdaie, MD

    Recruiting
  • Baptist Hospital East Louisville

    Louisville, Kentucky, 40207

    Kevin Parrott, MD

    Kevin Parrott, MD

    Recruiting
  • St. Luke's Idaho Cardiology Associates

    Meridian, Idaho, 83642

    Justice Oranefo, MD

    Justice Oranefo, MD

    Recruiting
  • Mobile Infirmary Medical Center

    Mobile, Alabama, 36608

    Ernest Matthew Quin, Dr.

    Ernest Matthew Quin, Dr.

    Recruiting
  • Morristown Medical Center

    Morristown, New Jersey, 07932

    Michael Katz, MD

    Michael Katz, MD

    Recruiting
  • Midwest Cardiovascular Institute

    Naperville, Illinois, 60540

    Withdrawn
  • St.Thomas Health

    Nashville, Tennessee, 37205

    Ricardo Lugo, MD

    Ricardo Lugo, MD

    Recruiting
  • Weill Cornell Medical University

    New York, New York, 10021

    Jim Cheung, Dr.

    Jim Cheung, Dr.

    Recruiting
  • Rochester General Hospital

    New York, New York, 14621

    Dmitry Chuprun, MD

    Dmitry Chuprun, MD

    Recruiting
  • Alta Bates Summit Medical Center

    Oakland, California, 94609

    Rajan Shah, Dr.

    Rajan Shah, Dr.

    Recruiting
  • Penn Presbyterian Medical Center

    Philadelphia, Pennsylvania, 19104

    John Bullinga, MD

    John Bullinga, MD

    Recruiting
  • Mayo Clinic Phoenix

    Phoenix, Arizona, 85054

    Mayank Sardana, MD

    Mayank Sardana, MD

    Recruiting
  • Heart Hospital Baylor Plano

    Plano, Texas, 75093

    Mustafa Dohadwala, MD

    Mustafa Dohadwala, MD

    Recruiting
  • Centracare Heart and Vascular Center

    Saint Cloud, Minnesota, 56303

    Withdrawn
  • Pacific Heart Institute

    Santa Monica, California, 90404

    Stephen Tang, MD

    Stephan Tang, MD

    Recruiting
  • Sarasota Memorial Hospital

    Sarasota, Florida, 34239

    Antonio Moretta, Dr.

    Antonio Moretta, Dr.

    Recruiting
  • Avera Heart Hospital of South Dakota

    Sioux Falls, South Dakota, 57108

    Christopher Stanton, Dr.

    Christopher Stanton, Dr.

    Recruiting
  • SUNY-Upstate Medical University

    Syracuse, New York, 13057

    Jorge Romero, MD

    Jorge Romero, MD

    Recruiting
  • AdventHealth Tampa

    Tampa, Florida, 33613

    Kenneth Yamamura, MD

    Kenneth Yamamura, MD

    Recruiting
  • Torrance Medical Center

    Torrance, California, 90505

    Gene Kim, MD

    Gene Kim, MD

    Recruiting
  • Christus Trinity Mother Frances Health System

    Tyler, Texas, 75701

    Stanislov Weiner, Dr.

    Stanislov Weiner, Dr.

    Recruiting
  • Cardiology Associates Medical Group, Inc.

    Ventura, California, 93003

    Jonathan Dukes, Dr.

    Jonathan Dukes, Dr.

    Recruiting
  • Washington Hospital Center

    Washington D.C., District of Columbia, 20010

    Cyrus Hadadi, MD

    Cyrus Hadadi, MD

    Recruiting
  • Geisinger Wyoming Valley

    Wilkes-Barre, Pennsylvania, 18702

    Pugazhendhi Vijayaraman, MD

    Pugazhendhi Vijayaraman, MD

    Recruiting

Other trials in United States

About this study

This study will compare two different methods to pace the heart to treat heart failure including:

  1. The current standard method of implanting a pacing lead in a vein on the surface of the left lower chamber of the heart (left ventricle) to deliver heart failure therapy. This method is called Cardiac Resynchronization Therapy (CRT).
  2. The other method is using a lead implanted in the Left Bundle Branch Area (LBBA) of your heart. This method is called Left Bundle Branch Area Pacing or LBBAP. This lead is approved by the Food and Drug Administration (FDA) to be implanted in this area of the heart, but not to provide heart failure treatment.
Being tested
CRT-D with a Quadripolar LV lead, CRT-D with INGEVITY+ pace/sense lead
Keywords
Heart Failure, Conduction System Pacing, Primary Prevention, Cardiac Resynchronization Therapy, Left Bundle Branch Area Pacing
Medical subject headings
Heart Failure

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • CRT-D with a Quadripolar LV leadDevice

    Participants randomized to this cohort will receive a BSC system: CRT-D, Right Atrial Lead (RA), Defibrillation Lead (RV), Quadripolar LV Lead.

  • CRT-D with INGEVITY+ pace/sense leadDevice

    Participants randomized to this cohort will receive a BSC system: CRT-D, Right Atrial Lead (RA), Defibrillation Lead (RV), INGEVITY+ pace/sense Lead (implanted in the LBBA)

Study groups in NCT07069738
Study groupRoleWhat they receive
CRT CohortActive comparatorParticipants will be randomized, implanted with a BSC CRT-D device using a Quadripolar lead, and device programmed to the respective cohort.
Receives: Device: CRT-D with a Quadripolar LV lead
LBBA CohortExperimentalParticipants will be randomized, implanted with a BSC CRT-D using the INGEVITY+ pace/sense lead implanted in the LBBA, and device programmed to the respective cohort.
Receives: Device: CRT-D with INGEVITY+ pace/sense lead

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Composite of reduction in all-cause mortality, heart transplant, left ventricular assist device, heart failure events, ventricular tachycardia/ventricular fibrillation requiring device therapy or external defibrillation/cardioversion.

    The primary effectiveness endpoint is a composite of reduction in all-cause mortality, heart transplant, left ventricular assist device (LVAD), time to first heart failure (HF) events, time to first ventricular tachycardia (VT) / ventricular fibrillation (VF) requiring device therapy or external defibrillation/cardioversion.

    Measured: Through study completion, up to maximum of 5 years

  2. System-related complication-free rate

    The primary safety endpoint is System-related complication-free rate of LBBAP at 12 months. This will be a single-arm analysis of the LBBAP group compared to a performance goal

    Measured: 12 months

Secondary outcomes (3)
  1. Win ratio composite assessment

    Win Ratio Ranking: 1) Death 2) Heart Transplant/LVAD 3) Number of Heart Failure (HF) events (includes in-patient, out-patient and HF re-admission 4) Number of VT/VF episodes requiring device therapy or external defibrillation/cardioversion (one episode per 24 hours 5) Change in MLHFQ (Minnesota Living with Heart Failure Questionnaire) quality of life

    Measured: Through study completion, up to a maximum of 5 years

  2. Composite of reduction in all-cause mortality, heart transplant, left ventricular assist device, heart failure events, ventricular tachycardia/ ventricular fibrillation requiring device therapy or external defibrillation/cardioversion.

    The primary effectiveness endpoint is a composite of reduction in all-cause mortality, heart transplant, left ventricular assist device (LVAD), time to first heart failure (HF) events, time to first ventricular tachycardia (VT) / ventricular fibrillation (VF) requiring device therapy or external defibrillation/cardioversion.

    Measured: Through study completion, up to a maximum of 5 years

  3. System-related complication-free rate between randomized arms

    System-related complication-free rate of LBBAP at 12 months. This will compare the two randomized arms.

    Measured: 12 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted17 Jul 2025
  2. Study start22 Oct 2025
  3. Primary completionNov 2029 (estimated)
  4. Study completionNov 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Participant
Enrolment
850 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07069738
Sponsor's protocol ID
C2403
Acronym
SYNCHRONICITY
Status last verified
Nov 2026
First submitted
23 Jun 2025
Last updated
3 Nov 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing CRT-D with a Quadripolar LV lead and CRT-D with INGEVITY+ pace/sense lead in people with Heart Failure - NYHA II - IV, run by Boston Scientific Corporation at 43 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 10 inclusion and 21 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 3 Nov 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 43 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Jacqueline Beaulieu (1-800-227-3422, jacqueline.beaulieu@bsci.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Composite of reduction in all-cause mortality, heart transplant, left ventricular assist device, heart failure events, ventricular tachycardia/ventricular fibrillation requiring device therapy or external defibrillation/cardioversion. (time frame: Through study completion, up to maximum of 5 years). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Nov 2026.

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