{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=9",
    "query": {
      "intervention": "Heart Rate Variability",
      "page": 9
    },
    "page_size": 10
  },
  "pagination": {
    "page": 9,
    "page_size": 10,
    "total_count": 295,
    "total_pages": 30,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=10&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate+Variability&page=8&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-22T02:56:16.864Z",
  "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": "NCT06614309",
      "title": "Non-invasive Treatment for Long COVID (Post COVID-19 Condition) Brain Fog",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Long COVID"
      ],
      "interventions": [
        {
          "name": "Acute Placebo Visit",
          "type": "OTHER"
        },
        {
          "name": "Acute Progressive Carbon Dioxide",
          "type": "OTHER"
        },
        {
          "name": "Acute Intermittent Hypoxia",
          "type": "OTHER"
        },
        {
          "name": "Training: Progressive Carbon Dioxide Ramping",
          "type": "OTHER"
        },
        {
          "name": "Training: Intermittent Hypoxic Exposure",
          "type": "OTHER"
        },
        {
          "name": "Training: Placebo Control",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "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": 45,
      "start_date": "2024-09-24",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-06-05",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "Scottsdale, Arizona",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06614309"
    },
    {
      "nct_id": "NCT00852878",
      "title": "The Treatment of Recurrent Abdominal Pain in Children",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Recurrent Abdominal Pain"
      ],
      "interventions": [
        {
          "name": "Biofeedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Behavioral Protocol",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Kaiser Permanente",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "6 Years to 17 Years"
      },
      "enrollment_count": 0,
      "start_date": "2009-03",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2015-06-23",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00852878"
    },
    {
      "nct_id": "NCT06390072",
      "title": "Project Hypnos: The Impact of a Brief Hypnosis Intervention on Single-limb Dynamic Balance in People With Chronic Ankle Instability",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Ankle Sprains",
        "Motor Coordination or Function; Developmental Disorder"
      ],
      "interventions": [
        {
          "name": "Self-Hypnosis",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Ankle Education",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Ohio University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 24,
      "start_date": "2023-09-25",
      "completion_date": "2023-11-27",
      "has_results": false,
      "last_update_posted_date": "2024-04-29",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "Athens, Ohio",
      "locations": [
        {
          "city": "Athens",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06390072"
    },
    {
      "nct_id": "NCT05090995",
      "title": "A PPG Sensor-Based Feedback Intervention for Heavy Drinking Young Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heavy Drinking",
        "Harmful; Use, Alcohol"
      ],
      "interventions": [
        {
          "name": "Behavioral Self-Management and Feedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Behavioral Self-Management",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "18 Years to 25 Years"
      },
      "enrollment_count": 60,
      "start_date": "2022-02-23",
      "completion_date": "2023-06-01",
      "has_results": true,
      "last_update_posted_date": "2024-12-13",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05090995"
    },
    {
      "nct_id": "NCT03993938",
      "title": "Pleth Variability Index (PVI) as a Measure of Volume Status During Transcatheter Mitral Valve Repair",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Mitral Regurgitation"
      ],
      "interventions": [
        {
          "name": "PVI measurement",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Henry Ford Health System",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2019-10-01",
      "completion_date": "2021-06-01",
      "has_results": true,
      "last_update_posted_date": "2022-06-24",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03993938"
    },
    {
      "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": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03915587"
    },
    {
      "nct_id": "NCT03067116",
      "title": "Posturography Changes During Pregnancy",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Pregnant Women"
      ],
      "interventions": [
        {
          "name": "Posturography Evaluation",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Anthropometrics",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Vitals",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Health and daily activity questionnaires",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "OTHER"
      ],
      "sponsor": "Caps Research Network",
      "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": 4,
      "start_date": "2016-05",
      "completion_date": "2018-04",
      "has_results": false,
      "last_update_posted_date": "2018-04-25",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "Marietta, Georgia",
      "locations": [
        {
          "city": "Marietta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03067116"
    },
    {
      "nct_id": "NCT00696852",
      "title": "Mindfulness, Yoga, and Cardiovascular Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiovascular Disease",
        "Stress",
        "Anxiety",
        "Depression"
      ],
      "interventions": [
        {
          "name": "Mindfulness Meditation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Yoga",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Exercise, Relaxation, and Health Education",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "40 Years to 75 Years"
      },
      "enrollment_count": 64,
      "start_date": "2008-06",
      "completion_date": "2009-05",
      "has_results": false,
      "last_update_posted_date": "2012-09-24",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00696852"
    },
    {
      "nct_id": "NCT04426162",
      "title": "Effects of Memory Boot Camp on Brain Function in Adults With Symptoms of Mild Cognitive Impairment (MCI)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Mild Cognitive Impairment"
      ],
      "interventions": [
        {
          "name": "Multi-domain Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Neurocore",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "55 Years to 85 Years"
      },
      "enrollment_count": 76,
      "start_date": "2017-10-05",
      "completion_date": "2019-04-24",
      "has_results": false,
      "last_update_posted_date": "2020-06-11",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 3,
      "location_summary": "Boca Raton, Florida • Palm Beach Gardens, Florida • Grandville, Michigan",
      "locations": [
        {
          "city": "Boca Raton",
          "state": "Florida"
        },
        {
          "city": "Palm Beach Gardens",
          "state": "Florida"
        },
        {
          "city": "Grandville",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04426162"
    },
    {
      "nct_id": "NCT05369169",
      "title": "Afferent Neurocardiac Signals, Cue Reactivity, and Cognitive Control",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Binge Drinking"
      ],
      "interventions": [
        {
          "name": "Resonance breathing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Low demand cognitive task",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 100,
      "start_date": "2022-07-01",
      "completion_date": "2024-06-30",
      "has_results": false,
      "last_update_posted_date": "2026-04-20",
      "last_synced_at": "2026-10-22T02:56:16.864Z",
      "location_count": 1,
      "location_summary": "New Brunswick, New Jersey",
      "locations": [
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05369169"
    }
  ]
}