{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=WATCHMAN+FLX",
    "query": {
      "intervention": "WATCHMAN FLX"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 12,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=WATCHMAN+FLX&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-11T17:33:14.564Z",
  "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": "NCT02702271",
      "title": "Investigational Device Evaluation of the WATCHMAN FLX™ LAA Closure Technology",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "WATCHMAN FLX",
          "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": 458,
      "start_date": "2018-05-07",
      "completion_date": "2021-03-12",
      "has_results": true,
      "last_update_posted_date": "2022-06-14",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 29,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Jonesboro, Arkansas + 24 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02702271"
    },
    {
      "nct_id": "NCT06213285",
      "title": "APPEND-CT Registry",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Stroke, Ischemic",
        "Device Related Thrombosis",
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Watchman FLX left atrial appendage occlusion",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Aarhus University Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2000,
      "start_date": "2024-02-14",
      "completion_date": "2025-01",
      "has_results": false,
      "last_update_posted_date": "2024-05-30",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06213285"
    },
    {
      "nct_id": "NCT06523166",
      "title": "Direct Comparison of Cardiac CT With TEE to Evaluate Watchman FLX LAA Occluder Device Characteristics",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Device Related Thrombosis",
        "Peri-device Leak"
      ],
      "interventions": [
        {
          "name": "Transesophageal echocardiography (TEE)",
          "type": "PROCEDURE"
        },
        {
          "name": "Cardiac CTA",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "University Hospitals Cleveland 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": 320,
      "start_date": "2026-03-27",
      "completion_date": "2026-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-04-07",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 5,
      "location_summary": "Los Angeles, California • Roslyn, New York • Charlotte, North Carolina + 2 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Roslyn",
          "state": "New York"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06523166"
    },
    {
      "nct_id": "NCT04394546",
      "title": "CHAMPION-AF Clinical Trial",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Stroke",
        "Bleeding"
      ],
      "interventions": [
        {
          "name": "WATCHMAN FLX LAAC Device",
          "type": "DEVICE"
        },
        {
          "name": "Non-Vitamin K Oral Anticoagulant",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "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": 3000,
      "start_date": "2020-10-15",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-09-11",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 95,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 83 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04394546"
    },
    {
      "nct_id": "NCT03795298",
      "title": "Comparison of Anticoagulation With Left Atrial Appendage Closure After AF Ablation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "WATCHMAN FLX Implant",
          "type": "DEVICE"
        },
        {
          "name": "Market-approved OAC",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "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": 1600,
      "start_date": "2019-05-20",
      "completion_date": "2024-07-24",
      "has_results": true,
      "last_update_posted_date": "2025-09-18",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 81,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Anchorage, Alaska + 70 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Anchorage",
          "state": "Alaska"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03795298"
    },
    {
      "nct_id": "NCT05809596",
      "title": "HEAL-LAA Clinical Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Bleeding",
        "Stroke"
      ],
      "interventions": [
        {
          "name": "WATCHMAN FLX Pro LAAC Device",
          "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": 949,
      "start_date": "2023-10-03",
      "completion_date": "2025-09-18",
      "has_results": true,
      "last_update_posted_date": "2025-11-04",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 45,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Tucson, Arizona + 39 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05809596"
    },
    {
      "nct_id": "NCT06052358",
      "title": "Left Atrial Appendage Closure With WATCHMAN FLX Device in Recurrent Gastrointestinal Bleeding: The GI-FLX Registry",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Atrial Fibrillation",
        "GI Bleeding"
      ],
      "interventions": [
        {
          "name": "LAAC with Watchman FLX device",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Kansas City Heart Rhythm Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 73,
      "start_date": "2023-08-23",
      "completion_date": "2025-06-11",
      "has_results": false,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 4,
      "location_summary": "Overland Park, Kansas • Kansas City, Missouri",
      "locations": [
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06052358"
    },
    {
      "nct_id": "NCT04569734",
      "title": "The ICE WATCHMAN Trial",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Left Atrial Appendage Closure With WATCHMAN Device Utilizing an Intra-procedural ICE Probe"
      ],
      "interventions": [
        {
          "name": "WATCHMAN device implant procedure utilizing ICE probe",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 101,
      "start_date": "2020-09-22",
      "completion_date": "2023-12-15",
      "has_results": false,
      "last_update_posted_date": "2023-12-27",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 2,
      "location_summary": "Santa Monica, California • Rochester, Minnesota",
      "locations": [
        {
          "city": "Santa Monica",
          "state": "California"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04569734"
    },
    {
      "nct_id": "NCT06521463",
      "title": "SIMPLAAFY Clinical Trial",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Stroke",
        "Bleeding"
      ],
      "interventions": [
        {
          "name": "WATCHMAN FLX Pro LAAC Device",
          "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": 1857,
      "start_date": "2024-10-01",
      "completion_date": "2027-01",
      "has_results": false,
      "last_update_posted_date": "2026-09-11",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 86,
      "location_summary": "Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 78 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06521463"
    },
    {
      "nct_id": "NCT07041125",
      "title": "Concomitant LAAC/AF Ablation (Watchman FLX Pro)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "PFA Ablation and LAAC Procedures"
      ],
      "interventions": [
        {
          "name": "Watchman FLX™ Pro device.",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Heart Rhythm Clinical and Research Solutions, LLC",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 122,
      "start_date": "2025-06-01",
      "completion_date": "2026-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-08-31",
      "last_synced_at": "2026-09-11T17:33:14.564Z",
      "location_count": 15,
      "location_summary": "Birmingham, Alabama • San Francisco, California • Littleton, Colorado + 12 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Littleton",
          "state": "Colorado"
        },
        {
          "city": "Delray Beach",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07041125"
    }
  ]
}