{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=LBBB",
    "query": {
      "condition": "LBBB"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 16,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=LBBB&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T07:37:48.939Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT05650658",
      "title": "Left vs Left Randomized Clinical Trial",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure",
        "Heart Failure With Reduced Ejection Fraction",
        "AV Block",
        "LBBB",
        "RBBB",
        "Intraventricular Conduction Delay",
        "Pacing-Induced Cardiomyopathy"
      ],
      "interventions": [
        {
          "name": "His/LBBP",
          "type": "DEVICE"
        },
        {
          "name": "BiVP",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Baylor College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2136,
      "start_date": "2023-09-13",
      "completion_date": "2029-06-30",
      "has_results": false,
      "last_update_posted_date": "2025-10-02",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 57,
      "location_summary": "Gilbert, Arizona • Tucson, Arizona • Little Rock, Arkansas + 46 more",
      "locations": [
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05650658"
    },
    {
      "nct_id": "NCT03803995",
      "title": "Mapping and Pacing of the His Bundle for Heart Failure Patients With Left Bundle Branch Block",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure",
        "Left Bundle-Branch Block"
      ],
      "interventions": [
        {
          "name": "Mapping and Pacing the His Bundle",
          "type": "PROCEDURE"
        },
        {
          "name": "Placing a guidewire in Coronary sinus for measurement of Q-LV during His Bundle pacing or, if needed, for LV pacing",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Abbott Medical Devices",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 18,
      "start_date": "2019-03-20",
      "completion_date": "2024-04-26",
      "has_results": false,
      "last_update_posted_date": "2025-10-02",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 1,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03803995"
    },
    {
      "nct_id": "NCT02205359",
      "title": "AdaptResponse Clinical Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure With Left Bundle Branch Block"
      ],
      "interventions": [
        {
          "name": "aCRT ON",
          "type": "DEVICE"
        },
        {
          "name": "aCRT OFF",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Medtronic Cardiac Rhythm and Heart Failure",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3797,
      "start_date": "2014-08",
      "completion_date": "2022-11-02",
      "has_results": true,
      "last_update_posted_date": "2023-11-29",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 90,
      "location_summary": "Mesa, Arizona • Phoenix, Arizona • Little Rock, Arkansas + 76 more",
      "locations": [
        {
          "city": "Mesa",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02205359"
    },
    {
      "nct_id": "NCT05652218",
      "title": "REsynchronization Comparison In LBBB and Normal or Mildly Reduced VENTricular Function With CRT (REINVENT-CRT)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Left Ventricular Ejection Fraction",
        "Heart Failure (HF)",
        "Left Bundle-Branch Block"
      ],
      "interventions": [
        {
          "name": "LB-CRT",
          "type": "DEVICE"
        },
        {
          "name": "BIV-CRT",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Inova Health Care Services",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 21,
      "start_date": "2023-02-26",
      "completion_date": "2026-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-06",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 2,
      "location_summary": "Durham, North Carolina • Falls Church, Virginia",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Falls Church",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05652218"
    },
    {
      "nct_id": "NCT03903107",
      "title": "The Fluoroless-CSP Trial Using Electroanatomic Mapping",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sinus Node Dysfunction",
        "Heart Block AV",
        "LBBB",
        "Heart Failure, Systolic"
      ],
      "interventions": [
        {
          "name": "Conventional fluoroscopy guided Conduction System Pacing(CSP)",
          "type": "PROCEDURE"
        },
        {
          "name": "Electroanatomic Mapping (Fluoroless) guided Conduction System Pacing(CSP)",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Rush University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2,
      "start_date": "2020-10-26",
      "completion_date": "2024-09-30",
      "has_results": false,
      "last_update_posted_date": "2025-02-28",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03903107"
    },
    {
      "nct_id": "NCT01983293",
      "title": "CRT Implant Strategy Using the Longest Electrical Delay for Non-left Bundle Branch Block Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Non-left Bundle Branch Block",
        "Ischemic or Non-ischemic Cardiomyopathy"
      ],
      "interventions": [
        {
          "name": "QLV based implant strategy",
          "type": "DEVICE"
        },
        {
          "name": "Standard of care implant strategy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Abbott Medical Devices",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 248,
      "start_date": "2013-11",
      "completion_date": "2018-01",
      "has_results": true,
      "last_update_posted_date": "2019-03-13",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 32,
      "location_summary": "Glendale, California • Los Angeles, California • Mission Viejo, California + 25 more",
      "locations": [
        {
          "city": "Glendale",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Mission Viejo",
          "state": "California"
        },
        {
          "city": "Stockton",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01983293"
    },
    {
      "nct_id": "NCT06601322",
      "title": "Functional Outcomes in CondUction System Pacing and Right Ventricular Synchrony (FOCUS-Right)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Left Branch Bundle Block",
        "RV - Right Ventricular Abnormality"
      ],
      "interventions": [
        {
          "name": "Pacemaker Interrogation and Electrocardiogram (ECG):",
          "type": "OTHER"
        },
        {
          "name": "Cardiopulmonary Exercise Test (CPET) and Exercise Stress Cardiac Magnetic Resonance (ExeCMR",
          "type": "OTHER"
        },
        {
          "name": "Continuous pacemaker telemetry (CPT)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Virginia Commonwealth University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2024-08-23",
      "completion_date": "2026-07",
      "has_results": false,
      "last_update_posted_date": "2026-06-17",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 1,
      "location_summary": "Richmond, Virginia",
      "locations": [
        {
          "city": "Richmond",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06601322"
    },
    {
      "nct_id": "NCT05884359",
      "title": "Left Bundle Branch Area Mapping for Conduction System Pacing",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Left Bundle-Branch Block",
        "Pacemaker DDD"
      ],
      "interventions": [
        {
          "name": "3D Electroanatomical Mapping (NavX)",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Steward St. Elizabeth's Medical Center of Boston, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "88 Years",
        "sex": "ALL",
        "summary": "18 Years to 88 Years"
      },
      "enrollment_count": 30,
      "start_date": "2023-06-01",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-07-21",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05884359"
    },
    {
      "nct_id": "NCT05251363",
      "title": "BIOTRONIK Conduction System Pacing With the Solia Lead",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Bradycardia",
        "Atrioventricular Block",
        "Left Bundle-Branch Block",
        "Cardiomyopathies"
      ],
      "interventions": [
        {
          "name": "Solia S lead",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Biotronik, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 194,
      "start_date": "2022-12-12",
      "completion_date": "2024-10-08",
      "has_results": true,
      "last_update_posted_date": "2025-03-18",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 14,
      "location_summary": "Phoenix, Arizona • Ventura, California • Washington D.C., District of Columbia + 9 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Ventura",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Sarasota",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05251363"
    },
    {
      "nct_id": "NCT03305393",
      "title": "Implementation of a Protocol Utilizing Adaptive CRT in a Normal AV Conduction, CRT Non-Response Population at Generator Replacement",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Adaptiv CRT",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Stern Cardiovascular Foundation, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1,
      "start_date": "2017-06-11",
      "completion_date": "2018-07-03",
      "has_results": false,
      "last_update_posted_date": "2019-09-19",
      "last_synced_at": "2026-07-22T07:37:48.939Z",
      "location_count": 1,
      "location_summary": "Germantown, Tennessee",
      "locations": [
        {
          "city": "Germantown",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03305393"
    }
  ]
}