{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Long+QT+Syndrome&page=2",
    "query": {
      "condition": "Long QT Syndrome",
      "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=Long+QT+Syndrome&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-06-11T02:18:41.918Z",
  "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": "NCT07075445",
      "title": "Observational Study to Describe Health-Related Quality of Life and Measure Disease Burden Among Patients With Long QT Syndrome Types (LQTS) 2 and 3",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Long QT Syndrome Type 3",
        "Long QT Syndrome 2"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Thryv Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2025-10-27",
      "completion_date": "2026-12-01",
      "has_results": false,
      "last_update_posted_date": "2025-11-17",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 1,
      "location_summary": "Greenville, North Carolina",
      "locations": [
        {
          "city": "Greenville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07075445"
    },
    {
      "nct_id": "NCT03775954",
      "title": "Fetal Electrophysiologic Abnormalities in High-Risk Pregnancies Associated With Fetal Demise",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "High Risk Pregnancy",
        "Congenital Heart Disease",
        "Fetal Hydrops",
        "Twin Monochorionic Monoamniotic Placenta",
        "Gastroschisis",
        "Fetal Demise",
        "Stillbirth",
        "Fetal Arrhythmia",
        "Long QT Syndrome",
        "Intrauterine Fetal Death",
        "Sudden Infant Death",
        "Pregnancy Loss",
        "Twin Twin Transfusion Syndrome",
        "Birth Defect",
        "Fetal Cardiac Anomaly",
        "Fetal Cardiac Disorder",
        "Fetal Death",
        "Brugada Syndrome",
        "Fetal Tachycardia"
      ],
      "interventions": [
        {
          "name": "Fetal Magnetocardiogram and Neonatal Electrocardiogram",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Substudy only: Maternal/Infant Pharmacogenomic assessment postnatally",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "GENETIC"
      ],
      "sponsor": "Medical College of Wisconsin",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 30,
      "start_date": "2018-07-01",
      "completion_date": "2028-11-30",
      "has_results": false,
      "last_update_posted_date": "2026-03-04",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 2,
      "location_summary": "Madison, Wisconsin • Milwaukee, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        },
        {
          "city": "Milwaukee",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03775954"
    },
    {
      "nct_id": "NCT02549664",
      "title": "Exercise in Genetic Cardiovascular Conditions",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Hypertrophic Cardiomyopathy",
        "Long QT Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "8 Years to 60 Years"
      },
      "enrollment_count": 4299,
      "start_date": "2015-05-01",
      "completion_date": "2022-11-14",
      "has_results": false,
      "last_update_posted_date": "2023-09-05",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 29,
      "location_summary": "Tucson, Arizona • Orange, California • San Diego, California + 24 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02549664"
    },
    {
      "nct_id": "NCT01947920",
      "title": "A Dose Ranging Escalation Study of Tramadol Hydrochloride in Healthy Volunteers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Tramadol HCl, 50 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Janssen Scientific Affairs, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 30,
      "start_date": "2013-08",
      "completion_date": "2013-11",
      "has_results": false,
      "last_update_posted_date": "2014-12-16",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 1,
      "location_summary": "Overland Park, Kansas",
      "locations": [
        {
          "city": "Overland Park",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01947920"
    },
    {
      "nct_id": "NCT01648205",
      "title": "Long-term Efficacy Study of Sodium Channel Blocker in LQT3 Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Long QT Syndrome"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Ranolazine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 25,
      "start_date": "2012-09",
      "completion_date": "2018-07-20",
      "has_results": true,
      "last_update_posted_date": "2022-04-07",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01648205"
    },
    {
      "nct_id": "NCT00335036",
      "title": "Pediatric Lead Extractability and Survival Evaluation (PLEASE)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Ventricular Tachycardia",
        "Ventricular Fibrillation",
        "Cardiomyopathy",
        "Long QT Syndrome",
        "Congenital Heart Disease"
      ],
      "interventions": [
        {
          "name": "ICD lead implant",
          "type": "DEVICE"
        },
        {
          "name": "Thin leads",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Charles Berul",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "1 Year to 55 Years"
      },
      "enrollment_count": 748,
      "start_date": "2006-06",
      "completion_date": "2009-01",
      "has_results": true,
      "last_update_posted_date": "2026-03-19",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00335036"
    },
    {
      "nct_id": "NCT02439658",
      "title": "Genetics of QT Prolongation With Antiarrhythmics",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Long QT Syndrome",
        "Drug Toxicity"
      ],
      "interventions": [
        {
          "name": "Dofetilide and/or sotalol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1000,
      "start_date": "2014-01",
      "completion_date": "2023-04-30",
      "has_results": false,
      "last_update_posted_date": "2022-04-04",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 5,
      "location_summary": "Aurora, Colorado • Boston, Massachusetts • Rochester, Minnesota + 1 more",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02439658"
    },
    {
      "nct_id": "NCT04169100",
      "title": "Novel Form of Acquired Long QT Syndrome",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Long QT Syndrome",
        "Connective Tissue Diseases",
        "Rheumatoid Arthritis"
      ],
      "interventions": [
        {
          "name": "Prednisone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Narrows Institute for Biomedical Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 25,
      "start_date": "2011-09-28",
      "completion_date": "2024-09-30",
      "has_results": false,
      "last_update_posted_date": "2022-04-11",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04169100"
    },
    {
      "nct_id": "NCT00715988",
      "title": "Methadone Pharmacokinetics and Cardiac Effects in Newborns",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Pain"
      ],
      "interventions": [
        {
          "name": "Methadone HCl Inject 10 mg/ml (will require dilution)",
          "type": "DRUG"
        },
        {
          "name": "Methadone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "29 Weeks",
        "maximum_age": "48 Weeks",
        "sex": "ALL",
        "summary": "29 Weeks to 48 Weeks"
      },
      "enrollment_count": 7,
      "start_date": "2007-10",
      "completion_date": "2017-02-10",
      "has_results": false,
      "last_update_posted_date": "2022-06-01",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 2,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00715988"
    },
    {
      "nct_id": "NCT01759420",
      "title": "Ondansetron and the QT Interval In Adult Emergency Department Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Ondansetron"
      ],
      "interventions": [
        {
          "name": "Ondansetron",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "C.R.Darnall Army Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 28,
      "start_date": "2012-12",
      "completion_date": "2014-05",
      "has_results": true,
      "last_update_posted_date": "2014-06-26",
      "last_synced_at": "2026-06-11T02:18:41.918Z",
      "location_count": 2,
      "location_summary": "Fort Hood, Texas • Tacoma, Washington",
      "locations": [
        {
          "city": "Fort Hood",
          "state": "Texas"
        },
        {
          "city": "Tacoma",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01759420"
    }
  ]
}