{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rhythm+Biofeedback",
    "query": {
      "intervention": "Heart Rhythm Biofeedback"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-13T07:16:53.474Z",
  "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": "NCT05397626",
      "title": "Biofeedback and Hydrogen Water as Treatments for Chronic Fatigue Syndrome",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Chronic Fatigue Syndrome"
      ],
      "interventions": [
        {
          "name": "Heart Rhythm Biofeedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Hydrogen Water",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Combined treatment: Heart rhythm biofeedback plus hydrogen water",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DIETARY_SUPPLEMENT",
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "Stony Brook 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": 39,
      "start_date": "2022-05-23",
      "completion_date": "2023-05-23",
      "has_results": false,
      "last_update_posted_date": "2022-05-31",
      "last_synced_at": "2026-09-13T07:16:53.474Z",
      "location_count": 1,
      "location_summary": "Stony Brook, New York",
      "locations": [
        {
          "city": "Stony Brook",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05397626"
    },
    {
      "nct_id": "NCT03235466",
      "title": "A Prospective Trial of Behavioral Therapy for Chronic Cough",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cough"
      ],
      "interventions": [
        {
          "name": "Voice Therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Voice Therapy and Heart Rate Variability Biofeedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Heart Rate Variability Biofeedback",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 45,
      "start_date": "2018-02-01",
      "completion_date": "2021-12-01",
      "has_results": false,
      "last_update_posted_date": "2020-12-04",
      "last_synced_at": "2026-09-13T07:16:53.474Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03235466"
    },
    {
      "nct_id": "NCT05627687",
      "title": "Caring Relationships Expression Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Caregiver Burden",
        "Anxiety",
        "Stress"
      ],
      "interventions": [
        {
          "name": "Heart Rate Variability Biofeedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Music Listening Control",
          "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": 38,
      "start_date": "2021-12-13",
      "completion_date": "2023-07-01",
      "has_results": false,
      "last_update_posted_date": "2024-02-12",
      "last_synced_at": "2026-09-13T07:16:53.474Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05627687"
    },
    {
      "nct_id": "NCT01568177",
      "title": "Cardiac Autonomic Function in Women with Microvascular Coronary Dysfunction",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Microvascular Coronary Dysfunction"
      ],
      "interventions": [
        {
          "name": "Mental Stress Testing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Peripheral Arterial Tonometry (PAT) Testing",
          "type": "OTHER"
        },
        {
          "name": "Heart Rate Variability (HRV)",
          "type": "OTHER"
        },
        {
          "name": "RESPeRATE Breathing Trial",
          "type": "OTHER"
        },
        {
          "name": "SPECT cardiac scan with 123I-mIBG and Myoview",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "Cedars-Sinai Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 105,
      "start_date": "2011-02",
      "completion_date": "2024-02",
      "has_results": false,
      "last_update_posted_date": "2024-09-19",
      "last_synced_at": "2026-09-13T07:16:53.474Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01568177"
    },
    {
      "nct_id": "NCT02766374",
      "title": "Heart Rate Variability Biofeedback: It's Role in Asthma Therapeutics",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Asthma"
      ],
      "interventions": [
        {
          "name": "Heart rate variability biofeedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Placebo",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Fred Wamboldt, MD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 68,
      "start_date": "2009-12",
      "completion_date": "2018-01",
      "has_results": true,
      "last_update_posted_date": "2019-01-15",
      "last_synced_at": "2026-09-13T07:16:53.474Z",
      "location_count": 2,
      "location_summary": "Denver, Colorado • Piscataway, New Jersey",
      "locations": [
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Piscataway",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02766374"
    }
  ]
}