{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability",
    "query": {
      "intervention": "Heart Rate Variability"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 288,
    "total_pages": 29,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-02T23:27:51.447Z",
  "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": "NCT02833220",
      "title": "The Effects of Single-Pulse Transcranial Magnetic Stimulation on the Autonomic Nervous System in Healthy Adults",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Single-Pulse Transcranial Magnetic Stimulation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 20,
      "start_date": "2017-01",
      "completion_date": "2019-01",
      "has_results": false,
      "last_update_posted_date": "2019-04-16",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02833220"
    },
    {
      "nct_id": "NCT04077450",
      "title": "Heart-Focused Breathing in Alzheimer's Disease Caregivers",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Burnout, Caregiver",
        "Quality of Life"
      ],
      "interventions": [
        {
          "name": "Online Heart-Focused Breathing Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Arizona State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2019-01-28",
      "completion_date": "2020-01-27",
      "has_results": false,
      "last_update_posted_date": "2020-02-25",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04077450"
    },
    {
      "nct_id": "NCT07220421",
      "title": "Foundational Programs to Combat Clinician Stress",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Burnout, Professional",
        "Stress, Psychological",
        "Stress, Physiological",
        "Psychological Well-Being",
        "Mind-Body Therapies",
        "Work Related Stress"
      ],
      "interventions": [
        {
          "name": "Sudarshan Kriya Yoga (SKY) Breathing and Sahaj Meditation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Health Education Program (HEP)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "Lancaster General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "25 Years to 70 Years"
      },
      "enrollment_count": 180,
      "start_date": "2025-09-15",
      "completion_date": "2026-05",
      "has_results": false,
      "last_update_posted_date": "2025-10-23",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 6,
      "location_summary": "Boston, Massachusetts • Plainsboro, New Jersey • Lancaster, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Plainsboro",
          "state": "New Jersey"
        },
        {
          "city": "Lancaster",
          "state": "Pennsylvania"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07220421"
    },
    {
      "nct_id": "NCT05214131",
      "title": "Randomized Study Of Novel Enuresis Alarm vs Standard Bedwetting Alarm",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Bedwetting",
        "Nocturnal Enuresis",
        "Urinary Incontinence"
      ],
      "interventions": [
        {
          "name": "gogoband",
          "type": "DEVICE"
        },
        {
          "name": "SNEA group",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "6 Years to 21 Years"
      },
      "enrollment_count": 16,
      "start_date": "2022-04-29",
      "completion_date": "2025-06-13",
      "has_results": true,
      "last_update_posted_date": "2026-03-09",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05214131"
    },
    {
      "nct_id": "NCT00981370",
      "title": "Clinical Importance of Treating Iron Overload in Sickle Cell Disease",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Anemia, Sickle Cell",
        "Transfusion Hemosiderosis"
      ],
      "interventions": [
        {
          "name": "deferasirox",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Children's Hospital Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "14 Years and older"
      },
      "enrollment_count": 1,
      "start_date": "2009-04",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2017-02-08",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00981370"
    },
    {
      "nct_id": "NCT05830773",
      "title": "Resonance Breathing Intervention Opioid Use Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Substance-Related Disorders"
      ],
      "interventions": [
        {
          "name": "Resonance Breathing Exercises",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Texas at Austin",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2021-03-09",
      "completion_date": "2023-08-31",
      "has_results": false,
      "last_update_posted_date": "2024-01-09",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Austin, Texas",
      "locations": [
        {
          "city": "Austin",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05830773"
    },
    {
      "nct_id": "NCT06279182",
      "title": "Impact of Barre Stretching Among Dental Hygiene Students",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Musculoskeletal Disorders",
        "Stress Management",
        "Perceived Stress",
        "Reported Stress",
        "Perceived Pain",
        "Reported Pain"
      ],
      "interventions": [
        {
          "name": "Barre Stretching Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Idaho State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 11,
      "start_date": "2024-09-09",
      "completion_date": "2024-10-18",
      "has_results": false,
      "last_update_posted_date": "2025-05-08",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Pocatello, Idaho",
      "locations": [
        {
          "city": "Pocatello",
          "state": "Idaho"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06279182"
    },
    {
      "nct_id": "NCT07783061",
      "title": "Reducing Cardiovascular Risks: The Role of Alcohol Use",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Alcohol Drinking",
        "Drinking Behavior",
        "At-risk Drinking",
        "Cardiovascular Risk Factor",
        "High Blood Pressure"
      ],
      "interventions": [
        {
          "name": "Alcohol Abstinence",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control arm",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "The University of Texas at Arlington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "26 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "26 Years to 49 Years"
      },
      "enrollment_count": 148,
      "start_date": "2026-10",
      "completion_date": "2031-09",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Arlington, Texas",
      "locations": [
        {
          "city": "Arlington",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07783061"
    },
    {
      "nct_id": "NCT04249986",
      "title": "Backpack Weight Impacts",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Exertion; Excess"
      ],
      "interventions": [
        {
          "name": "The Borg Rating of Perceived Exertion",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 20,
      "start_date": "2020-02-21",
      "completion_date": "2024-07-01",
      "has_results": false,
      "last_update_posted_date": "2024-08-05",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Fresno, California",
      "locations": [
        {
          "city": "Fresno",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04249986"
    },
    {
      "nct_id": "NCT01359683",
      "title": "Heart Rate Variability Changes During Cardiac Surgery And The Incidence Of Post-Operative Cardiac Arrhythmias",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiac Arrhythmia"
      ],
      "interventions": [
        {
          "name": "Dataq Instruments DI-158",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Drexel University College of Medicine",
      "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": "2007-09",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2013-06-14",
      "last_synced_at": "2026-09-02T23:27:51.447Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01359683"
    }
  ]
}