{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Rate+Fast&page=4",
    "query": {
      "condition": "Heart Rate Fast",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 372,
    "total_pages": 38,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Rate+Fast&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Rate+Fast&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-21T21:44:57.458Z",
  "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": "NCT01795469",
      "title": "Abdominal and Lower Extremity Compression During Tilt Table Testing in Adolescent POTS Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Postural Orthostatic Tachycardia Syndrome (POTS)",
        "Syncope"
      ],
      "interventions": [
        {
          "name": "Zoex compression garment",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Nationwide Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "12 Years to 19 Years"
      },
      "enrollment_count": 20,
      "start_date": "2013-02",
      "completion_date": "2016-02",
      "has_results": false,
      "last_update_posted_date": "2017-01-31",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01795469"
    },
    {
      "nct_id": "NCT01898221",
      "title": "Vein of Marshall Ethanol Infusion for Persistent Atrial Fibrillation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Ventricular Tachycardia",
        "Atrial Fibrillation"
      ],
      "interventions": [
        {
          "name": "Ethanol",
          "type": "DRUG"
        },
        {
          "name": "Ablation",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "The Methodist Hospital Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 343,
      "start_date": "2013-10",
      "completion_date": "2019-12",
      "has_results": true,
      "last_update_posted_date": "2025-08-21",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 12,
      "location_summary": "Phoenix, Arizona • Los Angeles, California • San Diego, California + 7 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01898221"
    },
    {
      "nct_id": "NCT02558972",
      "title": "Northera Improves Postural Tachycardia Syndrome (POTS) and Postural Vasovagal Syncope (VVS)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Postural Tachycardia Syndrome (POTS)",
        "Vasovagal Syncope (VVS)",
        "Fainting"
      ],
      "interventions": [
        {
          "name": "Northera (Droxidopa)",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "New York Medical College",
      "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": 30,
      "start_date": "2015-09",
      "completion_date": "2022-12",
      "has_results": false,
      "last_update_posted_date": "2025-05-23",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 1,
      "location_summary": "Hawthorne, New York",
      "locations": [
        {
          "city": "Hawthorne",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02558972"
    },
    {
      "nct_id": "NCT05675865",
      "title": "Cryoablation for Monomorphic Ventricular Tachycardia",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sustained VT"
      ],
      "interventions": [
        {
          "name": "cryoablation procedure",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Adagio Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 206,
      "start_date": "2023-09-11",
      "completion_date": "2027-03-30",
      "has_results": false,
      "last_update_posted_date": "2026-08-07",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 13,
      "location_summary": "Phoenix, Arizona • San Francisco, California • Baltimore, Maryland + 9 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05675865"
    },
    {
      "nct_id": "NCT07478172",
      "title": "Effects of Whole-body Electrical Muscle Stimulation Exercise on Adults With Neuromuscular Disease",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Neuromuscular Diseases (NMD)",
        "Amyotrophic Lateral Sclerosis",
        "Myasthenia Gravis",
        "Lambert-eaton Myasthenic Syndrome",
        "Primary Lateral Sclerosis",
        "Spinal Muscular Atrophy",
        "Charcot Marie Tooth Disease (CMT)",
        "Fascioscapulohumeral Muscular Dystrophy",
        "Inclusion Body Myositis",
        "Mitochondrial Myopathy",
        "Nemaline Myopathy",
        "Centronuclear Myopathy",
        "Postpolio Syndrome",
        "Pompe Disease (Late-onset)",
        "Chronic Inflammatory Demyelinating Polyneuropathy",
        "Hereditary Spastic Paraplegia",
        "Postural Orthostatic Tachycardia Syndrome (POTS)",
        "Progressive Muscular Atrophy"
      ],
      "interventions": [
        {
          "name": "Whole-body Electrical Muscle Stimulation Exercise",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Missouri-Columbia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2026-03-10",
      "completion_date": "2031-01-07",
      "has_results": false,
      "last_update_posted_date": "2026-03-17",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 1,
      "location_summary": "Columbia, Missouri",
      "locations": [
        {
          "city": "Columbia",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07478172"
    },
    {
      "nct_id": "NCT00692471",
      "title": "Sleep Actigraphy in Postural Tachycardia Syndrome (POTS)",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Postural Tachycardia Syndrome",
        "Orthostatic Intolerance",
        "Sleep Disorders"
      ],
      "interventions": [
        {
          "name": "Actigraphy Watch (motion sensors) with light sensors - ActiWatch from Minimitter",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Satish R. Raj",
      "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": 100,
      "start_date": "2008-06",
      "completion_date": "2029-12",
      "has_results": false,
      "last_update_posted_date": "2026-10-16",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00692471"
    },
    {
      "nct_id": "NCT00510731",
      "title": "The Ability Of The PD2i Cardiac Analyzer To Predict Risk Of Ventricular Tachyarrhythmic Events",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Tachycardia, Ventricular",
        "Cardiac Sudden Death"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Vicor Technologies, 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": "2006-11",
      "completion_date": "2009-12",
      "has_results": false,
      "last_update_posted_date": "2015-12-09",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 19,
      "location_summary": "Los Angeles, California • San Ramon, California • Walnut Creek, California + 14 more",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Ramon",
          "state": "California"
        },
        {
          "city": "Walnut Creek",
          "state": "California"
        },
        {
          "city": "Hartford",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00510731"
    },
    {
      "nct_id": "NCT00580619",
      "title": "Autonomic Nervous System and Chronic Fatigue Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Chronic Fatigue Syndrome",
        "Orthostatic Intolerance",
        "Postural Tachycardia Syndrome"
      ],
      "interventions": [
        {
          "name": "Autonomic Function Testing",
          "type": "OTHER"
        },
        {
          "name": "Saline infusions",
          "type": "OTHER"
        },
        {
          "name": "L-NMMA trimethaphan",
          "type": "DRUG"
        },
        {
          "name": "methyldopa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Vanderbilt University",
      "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": 170,
      "start_date": "2007-04",
      "completion_date": "2017-01",
      "has_results": false,
      "last_update_posted_date": "2017-01-18",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00580619"
    },
    {
      "nct_id": "NCT07650032",
      "title": "Cryoablation for Monomorphic Ventricular Tachycardia (VTS)",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Ventricular Tachycardia, Sustained",
        "Ventricular Tachycardia, Monomorphic"
      ],
      "interventions": [
        {
          "name": "Ultra Low Temperature Ablation (ULTA)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Adagio Medical",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2026-08-01",
      "completion_date": "2027-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-10-13",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 8,
      "location_summary": "Phoenix, Arizona • Long Beach, California • Boston, Massachusetts + 5 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Staten Island",
          "state": "New York"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07650032"
    },
    {
      "nct_id": "NCT06138873",
      "title": "Ablation-Index Guided Scar-Mediated Ventricular Tachycardia Ablation in Patients With Ischemic Cardiomyopathy",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Ventricular Tachycardia",
        "Ischemic Cardiomyopathy"
      ],
      "interventions": [
        {
          "name": "Ablation-index guided ventricular tachycardia ablation",
          "type": "PROCEDURE"
        },
        {
          "name": "Ventricular tachycardia ablation with no AI-guidance",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Rush University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100,
      "start_date": "2024-10-23",
      "completion_date": "2027-11-23",
      "has_results": false,
      "last_update_posted_date": "2025-09-22",
      "last_synced_at": "2026-10-21T21:44:57.458Z",
      "location_count": 5,
      "location_summary": "Chicago, Illinois • Boston, Massachusetts • Ann Arbor, Michigan + 2 more",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        },
        {
          "city": "Rochester",
          "state": "Minnesota"
        },
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06138873"
    }
  ]
}