National Heart, Lung, and Blood Institute (NHLBI)

Open enrollment with an early-phase pipeline tilt

According to ClinicalTrials.gov-derived indexes, National Heart, Lung, and Blood Institute (NHLBI) sits in the top decile of US sponsors by registered trial count (#73 of 15,742 sponsors by registered trial count).

501 total trials 62 currently recruiting 381 completed early-phase tilt top decile by trial count

National Heart, Lung, and Blood Institute (NHLBI): 501 sponsored US clinical trials, 62 recruiting.

National Heart, Lung, and Blood Institute (NHLBI) sponsors 501 registered US clinical trials on ClinicalTrials.gov, 62 of them currently recruiting, and 381 completed. 33 of these trials are in Phase 3-4 (later-stage) and 205 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Atherosclerosis, with 12 trials.

Top-decile sponsor footprint

National Heart, Lung, and Blood Institute (NHLBI) ranks in the top decile of sponsors by registered trial count (#73 of 15,742 sponsors by registered trial count). Volume at this scale usually reflects a long institutional pipeline, read phase tilt and therapeutic areas below before treating it as current-year activity.

Trial completion reliability score

C 68/100

381 of 417 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (91.4%), vs. national p10 68.4% / p90 100% among 1,234 sponsors with at least 10 decided trials. Still-open trials (Recruiting, Active-not-recruiting, Not-yet-recruiting) are excluded since they have not reached an outcome yet.

Open and recent trials

501 total, page 9 of 11

COMPLETED Phase 1

Effects of Miconazole on Blood Flow

NCT00004575

COMPLETED

Vitamin Replacement in Abetalipoproteinemia

NCT00004574

COMPLETED Phase 1

Magnetic Resonance Imaging to Detect Blood Vessel Inflammation in Patients Undergoing Peripheral Balloon Angioplasty

NCT00004549

COMPLETED Phase 2

MRI Evaluation of Chest Pain

NCT00001961

COMPLETED Phase 1

Vascular Effects of Endothelium-Derived Versus Hemoglobin-Transported Nitric Oxide in Healthy Subjects

NCT00001963

COMPLETED Phase 2

Cyclosporine A to Treat Hypertrophic Cardiomyopathy (HCM)

NCT00001965

COMPLETED Phase 2

Studying the Effectiveness of Pacemaker Therapy in Children Who Have Thickened Heart Muscle

NCT00001960

TERMINATED Phase 2

A Study to Determine Whether Therapy With Daclizumab Will Benefit Patients With Bone Marrow Failure

NCT00001962

COMPLETED

Genetic Analysis of African-Americans With High Blood Pressure

NCT00353925

COMPLETED Phase 2

Modified Bone Marrow Stem Cell Transplantation for Chronic Myelogenous Leukemia

NCT00001144

COMPLETED Phase 3

Action to Control Cardiovascular Risk in Diabetes (ACCORD)

NCT00000620

COMPLETED Phase 2

Study of TNFR:Fc (Enbrel) in the Treatment of Asthma

NCT00001893

COMPLETED Phase 3

Electromechanical Mapping to Evaluate Heart Muscle

NCT00001895

COMPLETED Phase 2

A Comparison of Two Treatments: Pacemaker and Percutaneous Transluminal Septal Ablation for Hypertrophic Cardiomyopathy

NCT00001894

COMPLETED

Sample Collections From the Airways of Asthmatic Patients

NCT00001888

COMPLETED Phase 2

Effects of Hormone Therapy on the Immune Systems of Postmenopausal Women With Chronic Infections

NCT00001890

COMPLETED Phase 3

Myocardial Contrast Echocardiography (MCE) to Check for Living and Working Heart Muscle

NCT00001891

COMPLETED Phase 2

Specialized Blood Cell Transplants for Cancers of the Blood and Bone Marrow

NCT00003838

COMPLETED

Identification of Genes Associated With Lung Disease in Patients With Rheumatoid Arthritis

NCT00001885

COMPLETED

Specimen Collection for Individuals With Lung Disease Associated With Rheumatoid Arthritis

NCT00001884

TERMINATED Phase 2

Stem Cell Transplantation for Metastatic Solid Tumors

NCT00001880

COMPLETED

Signs and Symptoms of Genetic Abnormalities Linked to Inherited Heart Disease

NCT00001881

COMPLETED

Collections of Blood and Stool Samples in Patients With Acute Hepatitis

NCT00001879

COMPLETED

Quality Control of Cardiopulmonary Exercise Equipment

NCT00001883

COMPLETED Phase 2

Comparison of Echocardiographic Techniques in Diagnosis of Coronary Artery Disease

NCT00001889

COMPLETED Phase 2

Real Time 3-Dimensional Stress Echocardiography

NCT00001886

COMPLETED

Factors Involved in Asthma and Airway Inflammation

NCT00001887

COMPLETED

Technical Evaluation of Cardiovascular Magnetic Resonance Imaging and Spectroscopy

NCT00001874

COMPLETED Phase 2

The Role of Cyclosporine in Blood Cell Transplants With T-Cell Add-Back for Blood Cancers

NCT00001873

COMPLETED

Cell Selection for Bone Marrow Transplants to Prevent Graft-Versus-Host-Disease

NCT00001872

COMPLETED Phase 2

Treatment of Pulmonary Sarcoidosis With Pentoxifylline

NCT00001877

COMPLETED

Factors Contributing to Increased Left Ventricle Size in Patients With Abnormally Enlarged Hearts

NCT00001878

COMPLETED

Study of Muscle Abnormalities in Patients With Specific Genetic Mutations

NCT00001871

COMPLETED Phase 2

Cord Blood Transplantation for Sickle Cell Anemia and Thalassemia

NCT00029380

TERMINATED Phase 1

Chemotherapy and Peripheral Stem Cell Transplantation in Treating Patients With Metastatic Melanoma

NCT00003552

COMPLETED

Official Record of Patients Diagnosed With Lymphangioleiomyomatosis (LAM)

NCT00001869

COMPLETED Phase 2

Vascular and Metabolic Effects of Hormone Therapy Combined With L-Arginine in Postmenopausal Women

NCT00001752

COMPLETED Phase 2

Comparing Treatments for Multiple Myeloma

NCT00001750

COMPLETED Phase 1

Study of the Effects of Temperature on Metabolism in Human Muscle

NCT00001753

COMPLETED Phase 2

Medical Treatment for Diamond Blackfan Anemia

NCT00001749

COMPLETED Phase 1

HLA-Mismatched Peripheral Blood Mobilized Hematopoietic Precursor Cell Transplantation for Hematological Malignancies

NCT00001748

COMPLETED

Racial Differences in Control of Blood Vessel Tone and Blood Flow

NCT00001747

COMPLETED

Screening for Inherited Heart Disease

NCT00001746

COMPLETED

Signs and Symptoms Associated With Molecular Defects in Genetically Inherited Heart Disease

NCT00027196

COMPLETED

Role of Toxins in Lung Infections Caused by Pseudomonas Aeruginosa

NCT00027183

COMPLETED Phase 2

Peripheral Stem Cell Transplant in Treating Patients With Metastatic Kidney Cancer

NCT00003553

COMPLETED

The Role of Cyclooxygenase Activity in the Endothelial Function of Hypertensive and Hypercholesterolemic Patients

NCT00001742

COMPLETED Phase 1

Study of Inherited Changes of Receptors Located on Blood Vessels

NCT00001741

COMPLETED

Evaluation of Left Ventricular Volumes by Real-Time 3-Dimensional Echocardiography

NCT00001740

COMPLETED

Magnetic Resonance Imaging of the Blood Vessels of the Heart

NCT00001638

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Phase Distribution

PhaseTrial count
Phase 1 87
Phase 2 118
Phase 3 29
Phase 4 4

What is open in the National Heart, Lung, and Blood Institute (NHLBI) pipeline

62 recruiting of 501 indexed (12% open); 381 completed (76%).

Phase mix: 33 late (III/IV) vs 205 early (I/II) (early-phase heavy).

Top condition: Atherosclerosis (12 trials), 9 others listed.

How open-pipeline share is computed

Recruiting share is recruiting_count divided by trial_count for this sponsor in the public registry export. Status can change between pulls; treat the figure as a research-attention snapshot, not product availability.

National Heart, Lung, and Blood Institute (NHLBI): open-pipeline peers nationwide

Peers matched on 501 registered trials and 12% open enrollment, not the therapeutic-area sidebar.

National Heart, Lung, and Blood Institute (NHLBI) sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot). 2×2 strategic matrix plotting 9 entities by Total trials (X) and Recruiting share (Y), with a crosshair dividing the plot into four quadrants. Higher volume & more openFocused & more openHigher volume, mostly closedSmaller & mostly closed 05001,0001,500 0%5%10%15%20% Total trials Recruiting share National Heart, Lung, and Blood Institute (NHLBI)H. Lee Moffitt Cancer Center and Research InstituteGilead SciencesNational Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)Beth Israel Deaconess Medical CenterBoston UniversityAstraZenecaDaiichi SankyoUniversity of Iowa
National Heart, Lung, and Blood Institute (NHLBI) sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

National Heart, Lung, and Blood Institute (NHLBI) sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 501 trials (± recruiting share)

Sponsors near 12% open enrollment (± trial volume)

What to do with this National Heart, Lung, and Blood Institute (NHLBI) page

501 registered trials is a research-attention snapshot, not an endorsement of National Heart, Lung, and Blood Institute (NHLBI) or any single study.

  • 62 of National Heart, Lung, and Blood Institute (NHLBI)'s trials are currently recruiting, check each one's own eligibility criteria before contacting a site. Browse recruiting trials
  • Atherosclerosis is the condition National Heart, Lung, and Blood Institute (NHLBI) studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Atherosclerosis trials
  • Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. National Heart, Lung, and Blood Institute (NHLBI) pipeline card: 501 registered trials from official public datasets. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.