{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Cardiac+Resynchronization+Therapy+%28CRT%29",
    "query": {
      "intervention": "Cardiac Resynchronization Therapy (CRT)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 171,
    "total_pages": 18,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Cardiac+Resynchronization+Therapy+%28CRT%29&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-23T13:58:16.206Z",
  "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": "NCT01871090",
      "title": "Remote Device Interrogation In The Emergency Department",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Disease",
        "Cardiovascular Disease",
        "Heart Failure",
        "Arrhythmias, Cardiac"
      ],
      "interventions": [
        {
          "name": "Unpaired remote monitoring transmitter",
          "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": 99,
      "start_date": "2013-09",
      "completion_date": "2015-07",
      "has_results": true,
      "last_update_posted_date": "2019-02-15",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 1,
      "location_summary": "Zanesville, Ohio",
      "locations": [
        {
          "city": "Zanesville",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01871090"
    },
    {
      "nct_id": "NCT02166762",
      "title": "Correlating QLV Interval to Left Ventricular (LV) Lead Position in Patients Receiving Cardiac Resynchronization Therapy.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure",
        "Cardiomyopathy",
        "Cardiac Arrhythmia"
      ],
      "interventions": [
        {
          "name": "QLV interval measurement",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of California, San Diego",
      "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": "2013-05",
      "completion_date": "2015-09",
      "has_results": false,
      "last_update_posted_date": "2019-06-07",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 1,
      "location_summary": "La Jolla, California",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02166762"
    },
    {
      "nct_id": "NCT00382863",
      "title": "Prospective Evaluation of Elastic Restraint to LESSen the Effects of Heart Failure (PEERLESS-HF) Trial",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "HeartNet Ventricular Support System",
          "type": "DEVICE"
        },
        {
          "name": "Optimal Medical/Device Therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "sponsor": "Paracor Medical, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "18 Years to 74 Years"
      },
      "enrollment_count": 220,
      "start_date": "2006-10",
      "completion_date": "2012-05",
      "has_results": true,
      "last_update_posted_date": "2012-07-13",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 29,
      "location_summary": "Birmingham, Alabama • Los Angeles, California • San Francisco, California + 26 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Newark",
          "state": "Delaware"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00382863"
    },
    {
      "nct_id": "NCT00698139",
      "title": "Cardiovascular and Neurohormonal Effects of Faster Atrial Pacing Rate",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Medtronic Pacemaker",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 3,
      "start_date": "2011-04",
      "completion_date": "2012-09",
      "has_results": true,
      "last_update_posted_date": "2018-04-27",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00698139"
    },
    {
      "nct_id": "NCT06977217",
      "title": "Factors Associated With Response to Cardiac Resynchronization Therapy in Heart Failure Patients With Non-LBBB ECG Pattern",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cardiomyopathies",
        "Heart Failure",
        "Non-left Bundle Branch Block",
        "Cardiac Resynchronization Therapy"
      ],
      "interventions": [
        {
          "name": "CRT-D implantation",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 270,
      "start_date": "2022-03-21",
      "completion_date": "2027-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-06-03",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06977217"
    },
    {
      "nct_id": "NCT05327062",
      "title": "Cardiac Resynchronization Therapy Delivery Guided Non-Invasive Electrical and Venous Anatomy Assessment",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiac Resynchronization Therapy",
        "Chronic Heart Failure",
        "Left Bundle-Branch Block"
      ],
      "interventions": [
        {
          "name": "CRT implantation guided by XSpline, a non-invasive electrical and venous anatomy assessment",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "XSpline S.p.A.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 150,
      "start_date": "2023-03-06",
      "completion_date": "2025-09",
      "has_results": false,
      "last_update_posted_date": "2024-10-24",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 4,
      "location_summary": "Chicago, Illinois • Boston, Massachusetts • Durham, North Carolina",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05327062"
    },
    {
      "nct_id": "NCT07069738",
      "title": "Safety and Effectiveness of Left Bundle Branch Area Pacing Versus Conventional Cardiac Resynchronization Therapy in Heart Failure",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure - NYHA II - IV"
      ],
      "interventions": [
        {
          "name": "CRT-D with a Quadripolar LV lead",
          "type": "DEVICE"
        },
        {
          "name": "CRT-D with INGEVITY+ pace/sense lead",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Boston Scientific Corporation",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 850,
      "start_date": "2025-10-22",
      "completion_date": "2029-11",
      "has_results": false,
      "last_update_posted_date": "2026-09-04",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 40,
      "location_summary": "Huntsville, Alabama • Mobile, Alabama • Phoenix, Arizona + 34 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07069738"
    },
    {
      "nct_id": "NCT00929474",
      "title": "BOOST - Benefit of Frequent Optimization After Cardiac Resynchronization Therapy Device Replacement",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "QuickOpt - SJM CRT (Group 1)",
          "type": "DEVICE"
        },
        {
          "name": "Control - SJM CRT (Group 2)",
          "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": 17,
      "start_date": "2009-06",
      "completion_date": "2010-09",
      "has_results": true,
      "last_update_posted_date": "2019-02-04",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 2,
      "location_summary": "Aurora, Colorado • Hattiesburg, Mississippi",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Hattiesburg",
          "state": "Mississippi"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00929474"
    },
    {
      "nct_id": "NCT01735916",
      "title": "MIRACLE EF Clinical Study",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Congestive Heart Failure",
        "Left Bundle Branch Block",
        "Systolic Heart Failure"
      ],
      "interventions": [
        {
          "name": "CRT-P Implant",
          "type": "DEVICE"
        },
        {
          "name": "CRT-P 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": 44,
      "start_date": "2012-12",
      "completion_date": "2014-03",
      "has_results": true,
      "last_update_posted_date": "2017-11-06",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 69,
      "location_summary": "Concord, California • La Jolla, California • Los Angeles, California + 62 more",
      "locations": [
        {
          "city": "Concord",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Rancho Mirage",
          "state": "California"
        },
        {
          "city": "Thousand Oaks",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01735916"
    },
    {
      "nct_id": "NCT02903940",
      "title": "The Application of Negative Atrioventricular Hysteresis in Cardiac Resynchronization Therapy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "CRT+NAVH",
          "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": 30,
      "start_date": "2016-12",
      "completion_date": "2022-12",
      "has_results": false,
      "last_update_posted_date": "2024-01-10",
      "last_synced_at": "2026-09-23T13:58:16.206Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02903940"
    }
  ]
}