{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Failure%2C+Normal+Ejection+Fraction&page=6",
    "query": {
      "condition": "Heart Failure, Normal Ejection Fraction",
      "page": 6
    },
    "page_size": 10
  },
  "pagination": {
    "page": 6,
    "page_size": 10,
    "total_count": 123,
    "total_pages": 13,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Failure%2C+Normal+Ejection+Fraction&page=7&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Failure%2C+Normal+Ejection+Fraction&page=5&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-11-15T09:02:09.018Z",
  "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": "NCT00293150",
      "title": "Reversing Endothelial and Diastolic Dysfunction and Improving Collagen Turnover in Diastolic Heart Failure",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Diastolic Heart Failure"
      ],
      "interventions": [
        {
          "name": "Eplerenone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 11,
      "start_date": "2003-09",
      "completion_date": "2007-09",
      "has_results": false,
      "last_update_posted_date": "2017-01-27",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00293150"
    },
    {
      "nct_id": "NCT04154878",
      "title": "2 New Measurements Used to Describe the Filling Phase of the Left Ventricle (LV).",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diastolic Heart Failure",
        "Left Ventricular Diastolic Dysfunction",
        "Left Ventricular Diastolic Collapse"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "AdventHealth",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "45 Years to 85 Years"
      },
      "enrollment_count": 111,
      "start_date": "2019-10-30",
      "completion_date": "2023-06-21",
      "has_results": false,
      "last_update_posted_date": "2023-06-29",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 1,
      "location_summary": "Orlando, Florida",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04154878"
    },
    {
      "nct_id": "NCT01778894",
      "title": "Mathematical Modeling to Determine Basic Muscle Properties in the Failing Heart",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Diastolic Heart Failure"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Nebraska",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 37,
      "start_date": "2013-09-01",
      "completion_date": "2022-02-03",
      "has_results": false,
      "last_update_posted_date": "2023-08-29",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01778894"
    },
    {
      "nct_id": "NCT07547540",
      "title": "A Study of LY3971297 in Participants With Heart Failure",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Heart Failure",
        "Heart Failure, Diastolic",
        "Heart Failure, Systolic"
      ],
      "interventions": [
        {
          "name": "LY3971297",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eli Lilly and Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 90,
      "start_date": "2026-08-11",
      "completion_date": "2027-11",
      "has_results": false,
      "last_update_posted_date": "2026-11-04",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 4,
      "location_summary": "Detroit, Michigan • St Louis, Missouri • Chapel Hill, North Carolina + 1 more",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07547540"
    },
    {
      "nct_id": "NCT04160000",
      "title": "Treatment Of Atrial Fibrillation In Preserved Cardiac Function Heart Failure",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Heart Failure",
        "Diastolic Heart Failure"
      ],
      "interventions": [
        {
          "name": "Catheter ablation",
          "type": "DEVICE"
        },
        {
          "name": "Rate or Rhythm control antiarrhythmic drugs for atrial fibrillation",
          "type": "DRUG"
        },
        {
          "name": "Insertion of CardioMems Hemodynamic monitor",
          "type": "DEVICE"
        },
        {
          "name": "Empiric heart failure drug therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "DRUG"
      ],
      "sponsor": "Electrophysiology Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 360,
      "start_date": "2020-07-26",
      "completion_date": "2025-06-30",
      "has_results": false,
      "last_update_posted_date": "2024-05-23",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 7,
      "location_summary": "Flagstaff, Arizona • Jonesboro, Arkansas • Littleton, Colorado + 4 more",
      "locations": [
        {
          "city": "Flagstaff",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "Littleton",
          "state": "Colorado"
        },
        {
          "city": "Overland",
          "state": "Missouri"
        },
        {
          "city": "Warren Township",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04160000"
    },
    {
      "nct_id": "NCT00094302",
      "title": "Aldosterone Antagonist Therapy for Adults With Heart Failure and Preserved Systolic Function",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Cardiovascular Diseases",
        "Heart Diseases",
        "Heart Failure, Congestive"
      ],
      "interventions": [
        {
          "name": "Spironolactone",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Carelon Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 3445,
      "start_date": "2006-08",
      "completion_date": "2013-06",
      "has_results": true,
      "last_update_posted_date": "2015-03-02",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 155,
      "location_summary": "Birmingham, Alabama • Glendale, Arizona • Phoenix, Arizona + 120 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Glendale",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00094302"
    },
    {
      "nct_id": "NCT04336995",
      "title": "Exercise Pulmonary Transit Time",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Heart Failure, Diastolic"
      ],
      "interventions": [
        {
          "name": "contrast echocardiography",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 14,
      "start_date": "2020-08-27",
      "completion_date": "2024-03-01",
      "has_results": true,
      "last_update_posted_date": "2024-04-09",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04336995"
    },
    {
      "nct_id": "NCT00505791",
      "title": "Double Blind Randomized Placebo Controlled Trial of Natrecor in Acute Decompensated Heart Failure With Normal EF",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Heart Failure, Congestive",
        "Dyspnea",
        "Pulmonary Edema"
      ],
      "interventions": [
        {
          "name": "Nesiritide",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Medicine and Dentistry of New Jersey",
      "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": "2007-08",
      "completion_date": "2008-08",
      "has_results": false,
      "last_update_posted_date": "2015-11-11",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 1,
      "location_summary": "Newark, New Jersey",
      "locations": [
        {
          "city": "Newark",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00505791"
    },
    {
      "nct_id": "NCT00043836",
      "title": "The DIAMOND Study: Distensibility Improvement And Remodeling in Diastolic Heart Failure",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Heart Failure, Congestive",
        "Dyspnea",
        "Pulmonary Edema"
      ],
      "interventions": [
        {
          "name": "ALT-711",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Synvista Therapeutics, Inc",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 20,
      "start_date": "2002-07",
      "completion_date": "2005-10",
      "has_results": false,
      "last_update_posted_date": "2009-09-02",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 2,
      "location_summary": "Winston-Salem, North Carolina • Charleston, South Carolina",
      "locations": [
        {
          "city": "Winston-Salem",
          "state": "North Carolina"
        },
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00043836"
    },
    {
      "nct_id": "NCT04682704",
      "title": "The Effect of Different Low-Level Tragus Stimulation Parameters On Autonomic Nervous System Function",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Heart Failure, Diastolic"
      ],
      "interventions": [
        {
          "name": "Parasym",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Oklahoma",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "21 Years to 90 Years"
      },
      "enrollment_count": 90,
      "start_date": "2021-11-30",
      "completion_date": "2025-02",
      "has_results": false,
      "last_update_posted_date": "2024-02-21",
      "last_synced_at": "2026-11-15T09:02:09.018Z",
      "location_count": 1,
      "location_summary": "Oklahoma City, Oklahoma",
      "locations": [
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04682704"
    }
  ]
}