{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Electrocardiogram+holter",
    "query": {
      "intervention": "Electrocardiogram holter"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 20,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Electrocardiogram+holter&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-20T01:27:39.154Z",
  "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": "NCT03902223",
      "title": "Routine Cardiac Screening in Sarcoidosis Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sarcoidosis",
        "Cardiac Sarcoidosis",
        "Boeck's Disease",
        "Besnier-Boeck Disease"
      ],
      "interventions": [
        {
          "name": "Enhanced Screening Protocol for Cardiac Sarcoidosis.",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Routine Screening for Suspected Cardiac Sarcoidosis",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Foundation for Sarcoidosis Research",
      "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": "2019-04-05",
      "completion_date": "2024-11-01",
      "has_results": false,
      "last_update_posted_date": "2025-01-14",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 10,
      "location_summary": "Denver, Colorado • Chicago, Illinois • Iowa City, Iowa + 6 more",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Iowa City",
          "state": "Iowa"
        },
        {
          "city": "Albany",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03902223"
    },
    {
      "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": "2026-09-20T01:27:39.154Z",
      "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": "NCT06172699",
      "title": "Assert-IQ Implantable Cardiac Monitor (ICM) Post Market Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Atrial Fibrillation Paroxysmal",
        "Atrial Fibrillation, Persistent",
        "Cardiac Arrhythmia",
        "Ablation"
      ],
      "interventions": [
        {
          "name": "Holter monitoring in patients who have been successfully implanted with an Abbott Assert-IQ ICM device",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Abbott Medical Devices",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 151,
      "start_date": "2024-01-01",
      "completion_date": "2025-11-10",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 11,
      "location_summary": "San Diego, California • Orlando, Florida • Overland Park, Kansas + 8 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Overland Park",
          "state": "Kansas"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Albany",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06172699"
    },
    {
      "nct_id": "NCT03309956",
      "title": "Holter Versus Zio Patch Electrocardiographic Monitoring in Children",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Arrhythmias, Cardiac",
        "Heart Block"
      ],
      "interventions": [
        {
          "name": "Holter Monitor",
          "type": "DEVICE"
        },
        {
          "name": "Zio Patch",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "Up to 21 Years"
      },
      "enrollment_count": 247,
      "start_date": "2017-10-18",
      "completion_date": "2019-10-19",
      "has_results": true,
      "last_update_posted_date": "2024-06-18",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03309956"
    },
    {
      "nct_id": "NCT05591157",
      "title": "Evaluation of CSF-3 in Performing ECG",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy",
        "ECG"
      ],
      "interventions": [
        {
          "name": "CSF-3 watch, designed to monitor a user's heart rate based on ECG (electrocardiogram) and PPG (Photoplethysmograph) readings",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "CardiacSense Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 47,
      "start_date": "2022-11-16",
      "completion_date": "2023-02-01",
      "has_results": false,
      "last_update_posted_date": "2023-02-10",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05591157"
    },
    {
      "nct_id": "NCT00538122",
      "title": "Changes in Heart Rhythms Associated With Antipsychotic Drug Treatment",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Schizophrenia",
        "Schizoaffective Disorder",
        "Bipolar Disorder"
      ],
      "interventions": [
        {
          "name": "24 Holter Monitor Recording",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Vanderbilt University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 12,
      "start_date": "2007-07",
      "completion_date": "2008-09",
      "has_results": false,
      "last_update_posted_date": "2009-01-27",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00538122"
    },
    {
      "nct_id": "NCT04818645",
      "title": "Insertable Cardiac Monitor for Primary Atrial Fibrillation Detection in High-Risk Heart Failure Patients",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "ASSERT Insertable Cardiac Monitor",
          "type": "DEVICE"
        },
        {
          "name": "Conventional Management and monitoring",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "OTHER"
      ],
      "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": 477,
      "start_date": "2023-01-31",
      "completion_date": "2028-07-01",
      "has_results": false,
      "last_update_posted_date": "2026-03-23",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04818645"
    },
    {
      "nct_id": "NCT03177681",
      "title": "The Effect of Yogurt in Cancer Patient With Moderate Gastrointestinal (GI) Symptoms",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Malignant Neoplasms of Independent (Primary) Multiple Sites"
      ],
      "interventions": [
        {
          "name": "Tongue Assessment",
          "type": "OTHER"
        },
        {
          "name": "Stool Sample",
          "type": "OTHER"
        },
        {
          "name": "Questionnaires",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Holter Monitor",
          "type": "DEVICE"
        },
        {
          "name": "Yogurt",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BEHAVIORAL",
        "DEVICE"
      ],
      "sponsor": "M.D. Anderson Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2022-03-01",
      "completion_date": "2023-03-21",
      "has_results": false,
      "last_update_posted_date": "2023-03-27",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03177681"
    },
    {
      "nct_id": "NCT07456852",
      "title": "Vasodilator Therapy With Isosorbide Mononitrate or Diltiazem to Reduce Vasotoxicity in Patients With Gastrointestinal Cancer Receiving Fluoropyrimidine Therapy",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Malignant Digestive System Neoplasm"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Capecitabine",
          "type": "DRUG"
        },
        {
          "name": "Diltiazem Hydrochloride",
          "type": "DRUG"
        },
        {
          "name": "Electrocardiogram",
          "type": "PROCEDURE"
        },
        {
          "name": "Fluorouracil",
          "type": "DRUG"
        },
        {
          "name": "Holter Monitoring",
          "type": "DEVICE"
        },
        {
          "name": "Isosorbide Mononitrate",
          "type": "DRUG"
        },
        {
          "name": "Medical Device Usage and Evaluation",
          "type": "OTHER"
        },
        {
          "name": "Placebo Administration",
          "type": "DRUG"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG",
        "DEVICE",
        "OTHER"
      ],
      "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": 60,
      "start_date": "2026-04-30",
      "completion_date": "2030-04-30",
      "has_results": false,
      "last_update_posted_date": "2026-06-02",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07456852"
    },
    {
      "nct_id": "NCT02991716",
      "title": "Surface Electrocardiogram (ECG) Signal Recording for Implantable Subcutaneous String Defibrillator (ISSD) Development",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Arrhythmia, Cardiac"
      ],
      "interventions": [
        {
          "name": "recorded patients",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "NewPace Ltd",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": null,
        "summary": "Not listed"
      },
      "enrollment_count": 50,
      "start_date": "2016-01",
      "completion_date": "2017-06",
      "has_results": false,
      "last_update_posted_date": "2018-01-17",
      "last_synced_at": "2026-09-20T01:27:39.154Z",
      "location_count": 1,
      "location_summary": "Atlantis, Florida",
      "locations": [
        {
          "city": "Atlantis",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02991716"
    }
  ]
}