{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Cardiac+Resynchronization+Therapy&page=2",
    "query": {
      "condition": "Cardiac Resynchronization Therapy",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Cardiac+Resynchronization+Therapy&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-06-26T09:51:09.250Z",
  "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": "NCT01520714",
      "title": "Effect of Posture on Left Ventricular (LV) Transvenous Lead Capture Thresholds (EXPECT)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Congestive Heart Failure"
      ],
      "interventions": [
        {
          "name": "Medtronic 4195 active fixation LV lead and Medtronic passive fixation LV lead",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Baylor Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 11,
      "start_date": "2009-12",
      "completion_date": "2011-12",
      "has_results": true,
      "last_update_posted_date": "2014-05-26",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 1,
      "location_summary": "Plano, Texas",
      "locations": [
        {
          "city": "Plano",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01520714"
    },
    {
      "nct_id": "NCT00359372",
      "title": "Predicting Response to Cardiac Resynchronization Therapy in Heart Failure",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heart Failure",
        "Left Ventricular Dysfunction"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Heart, Lung, and Blood Institute (NHLBI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 180,
      "start_date": "2006-07-28",
      "completion_date": "2007-05-29",
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 3,
      "location_summary": "Baltimore, Maryland • Bethesda, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00359372"
    },
    {
      "nct_id": "NCT00611260",
      "title": "Improvement in Clinical Outcomes in Heart Failure Patients With ICDs That Practice Meditation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Congestive Heart Failure",
        "Cardiac Resynchronization Therapy"
      ],
      "interventions": [
        {
          "name": "Vipassana Meditation practice and instruction",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Standard Medical Care",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 27,
      "start_date": "2007-04",
      "completion_date": "2012-02",
      "has_results": false,
      "last_update_posted_date": "2017-05-30",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 1,
      "location_summary": "Sacramento, California",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00611260"
    },
    {
      "nct_id": "NCT01179477",
      "title": "QuickFlex Micro Left Ventricular Lead Post Approval Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Implantation of a QuickFlex® μ Model 1258T LV Lead",
          "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": 1930,
      "start_date": "2010-09",
      "completion_date": "2017-09",
      "has_results": true,
      "last_update_posted_date": "2019-08-12",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 77,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 67 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01179477"
    },
    {
      "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": "2026-06-26T09:51:09.250Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06977217"
    },
    {
      "nct_id": "NCT00271544",
      "title": "Attain Model 4196 Left Ventricular (LV) Lead",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Pacing Lead",
          "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": 190,
      "start_date": "2007-02",
      "completion_date": "2008-12",
      "has_results": true,
      "last_update_posted_date": "2009-09-28",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 19,
      "location_summary": "Anchorage, Alaska • Phoenix, Arizona • Long Beach, California + 16 more",
      "locations": [
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Davenport",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00271544"
    },
    {
      "nct_id": "NCT00940888",
      "title": "SJ4 Post Approval Study in Implantable Cardioverter-Defibrillator and Cardiac Resynchronization Therapy Defibrillator Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Tachyarrhythmias",
        "Sudden Cardiac Death",
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "SJ4 connector and RV high voltage SJ4 lead",
          "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": 1701,
      "start_date": "2009-06",
      "completion_date": "2015-12",
      "has_results": true,
      "last_update_posted_date": "2019-02-04",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00940888"
    },
    {
      "nct_id": "NCT01751022",
      "title": "Attain Performa(TM) Quadripolar Lead Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Device: Attain Performa Pacing Lead (along with a standard CRT-D system)",
          "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": 1202,
      "start_date": "2012-12",
      "completion_date": "2015-02",
      "has_results": true,
      "last_update_posted_date": "2016-12-05",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 67,
      "location_summary": "Glendale, California • Riverside, California • San Diego, California + 64 more",
      "locations": [
        {
          "city": "Glendale",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Jose",
          "state": "California"
        },
        {
          "city": "Standford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01751022"
    },
    {
      "nct_id": "NCT03492788",
      "title": "Optimizing CRT With ECGI",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure, Systolic",
        "Left Bundle-Branch Block"
      ],
      "interventions": [
        {
          "name": "ECGI-optimized VV-offset",
          "type": "OTHER"
        },
        {
          "name": "Zero VV-offset",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 3,
      "start_date": "2017-12-28",
      "completion_date": "2018-10-05",
      "has_results": false,
      "last_update_posted_date": "2019-05-01",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03492788"
    },
    {
      "nct_id": "NCT00980057",
      "title": "Adaptive Cardiac Resynchronization Therapy Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Adaptive CRT (aCRT)",
          "type": "DEVICE"
        },
        {
          "name": "Echo",
          "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": 522,
      "start_date": "2009-10-01",
      "completion_date": "2012-03-08",
      "has_results": true,
      "last_update_posted_date": "2018-10-16",
      "last_synced_at": "2026-06-26T09:51:09.250Z",
      "location_count": 55,
      "location_summary": "Huntsville, Alabama • Anchorage, Alaska • Phoenix, Arizona + 52 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Glendale",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00980057"
    }
  ]
}