{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=13",
    "query": {
      "intervention": "Heart Rate Variability",
      "page": 13
    },
    "page_size": 10
  },
  "pagination": {
    "page": 13,
    "page_size": 10,
    "total_count": 295,
    "total_pages": 30,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=14&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=12&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-22T13:02:38.066Z",
  "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": "NCT06546163",
      "title": "The Effects of Heart Rate Variability Biofeedback on College Students With Disordered Eating",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Eating Disorders",
        "Eating, Binge",
        "Anorexia Nervosa/Bulimia",
        "Eating Disorder Binge",
        "Heart Rate Variability",
        "Psychological Distress",
        "Emotion Regulation",
        "Autonomic Nervous System"
      ],
      "interventions": [
        {
          "name": "Baseline survey",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Heart rate variability biofeedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Educational materials",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Arizona State University",
      "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": 21,
      "start_date": "2024-01-08",
      "completion_date": "2024-08-01",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06546163"
    },
    {
      "nct_id": "NCT03915587",
      "title": "Bedside Resources to Gauge Intravascular Volume Status",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypovolemia",
        "Craniosynostoses"
      ],
      "interventions": [
        {
          "name": "CardioQ-EDM and CipherOx-CRI",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Colorado, Denver",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Months",
        "maximum_age": "2 Years",
        "sex": "ALL",
        "summary": "3 Months to 2 Years"
      },
      "enrollment_count": 23,
      "start_date": "2019-04-08",
      "completion_date": "2020-03-12",
      "has_results": true,
      "last_update_posted_date": "2023-06-29",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03915587"
    },
    {
      "nct_id": "NCT00194701",
      "title": "Exercise to Improve Sleep in Heart Failure",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Walking exercise",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 152,
      "start_date": "1998-04",
      "completion_date": "2002-03",
      "has_results": false,
      "last_update_posted_date": "2008-01-11",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00194701"
    },
    {
      "nct_id": "NCT03243084",
      "title": "Transcranial Alternating Current Stimulation in Back Pain- Pilot Sudy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronic Low Back Pain"
      ],
      "interventions": [
        {
          "name": "XCSITE100 Stimulator Sham",
          "type": "DEVICE"
        },
        {
          "name": "XCSITE100 Stimulator tACS",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "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": 21,
      "start_date": "2017-09-07",
      "completion_date": "2018-01-10",
      "has_results": true,
      "last_update_posted_date": "2018-12-12",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03243084"
    },
    {
      "nct_id": "NCT04325321",
      "title": "The Broken Heart Study II (BHS-II)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Takotsubo Cardiomyopathy"
      ],
      "interventions": [
        {
          "name": "Stress reactivity test",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "The Miriam Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 66,
      "start_date": "2020-09-02",
      "completion_date": "2026-02-28",
      "has_results": true,
      "last_update_posted_date": "2026-09-29",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Providence, Rhode Island",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04325321"
    },
    {
      "nct_id": "NCT02269384",
      "title": "The Effects of Pain and the Memory of Pain on Autonomic and Neuromuscular Function",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pain"
      ],
      "interventions": [
        {
          "name": "Experimental Noxious Stimulus",
          "type": "PROCEDURE"
        },
        {
          "name": "Memory of Experimental Noxious Stimulus",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Memory of Prior Significant Injury",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Mental Challenge Test",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "BEHAVIORAL"
      ],
      "sponsor": "Mount St. Mary's College, Los Angeles, CA",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 60,
      "start_date": "2014-05",
      "completion_date": "2015-10",
      "has_results": false,
      "last_update_posted_date": "2015-02-18",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02269384"
    },
    {
      "nct_id": "NCT06151184",
      "title": "Post-concussion Syndrome and Chiropractic",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Post-Concussion Syndrome"
      ],
      "interventions": [
        {
          "name": "Chiropractic adjustment",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Life University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3,
      "start_date": "2024-01-27",
      "completion_date": "2026-01-31",
      "has_results": false,
      "last_update_posted_date": "2026-03-25",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Marietta, Georgia",
      "locations": [
        {
          "city": "Marietta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06151184"
    },
    {
      "nct_id": "NCT04451850",
      "title": "HRV as a Marker of Treatment Response in PAH Arterial Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pulmonary Arterial Hypertension"
      ],
      "interventions": [
        {
          "name": "Noninvasive actigraphy monitor",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Cincinnati",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 24,
      "start_date": "2021-06-01",
      "completion_date": "2024-12-01",
      "has_results": false,
      "last_update_posted_date": "2025-03-30",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Cincinnati, Ohio",
      "locations": [
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04451850"
    },
    {
      "nct_id": "NCT04556240",
      "title": "RECORD-VP: Real-time Evaluation of Cardiac Outpatient Recording Device With VitalPatch RTM",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Arrhythmias, Cardiac"
      ],
      "interventions": [
        {
          "name": "VitalConnect Platform",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "VitalConnect Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2020-09-15",
      "completion_date": "2020-11-30",
      "has_results": false,
      "last_update_posted_date": "2023-07-27",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "Chevy Chase, Maryland",
      "locations": [
        {
          "city": "Chevy Chase",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04556240"
    },
    {
      "nct_id": "NCT05506644",
      "title": "Biofeedback for Psoriasis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Psoriasis",
        "Psoriasis Vulgaris",
        "Psychophysiological Disorder",
        "Anxiety",
        "Depression",
        "Psychological Stress",
        "Physiological Stress",
        "Quality of Life",
        "Skin Disorder",
        "Skin Diseases"
      ],
      "interventions": [
        {
          "name": "HRV-Biofeedback/Mind-Body Therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Bastyr University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5,
      "start_date": "2022-06-07",
      "completion_date": "2023-03-31",
      "has_results": false,
      "last_update_posted_date": "2024-07-09",
      "last_synced_at": "2026-10-22T13:02:38.066Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05506644"
    }
  ]
}