Clinical trial Recruiting at 205 sites Phase 3 Interventional Ages 18 to 85

Using omecamtiv mecarbil to treat chronic heart failure with severely reduced ejection fraction

Official title: A Multi-Center, Double-Blind, Randomized, Placebo-Controlled Trial to Assess Efficacy and Safety of Omecamtiv Mecarbil in Patients With Symptomatic Heart Failure With Severely Reduced Ejection Fraction (COMET-HF)

Run by Cytokinetics · NCT06736574 · Data updated 2026-11-12

This study is testing if a new drug called omecamtiv mecarbil can help people with severe chronic heart failure live longer and avoid serious heart problems.

More Heart Failure trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years to 85 Years
SexAll
Enrollment1800 (estimated)
SponsorCytokinetics
Industry-sponsored
Locations213 sites (Alexander City, Alabama and 212 other locations)
StatusRecruiting
StartedDecember 19, 2024
Main results expectedSeptember 2027
Study endsDecember 2027
Registry record updatedNovember 4, 2026
Trial IDNCT06736574 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 to 85 with chronic heart failure and severely reduced ejection fraction who are currently hospitalized or have had a recent heart failure event.

Probably not a fit

Patients with heart failure who do not meet the specific ejection fraction and NT-proBNP criteria, or those currently taking digoxin, may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the efficacy and safety of omecamtiv mecarbil, an investigational drug, in patients with chronic heart failure and severely reduced ejection fraction. Participants will be randomized to receive either the drug or a placebo, and the study aims to determine if the treatment can reduce the risk of cardiovascular death, heart failure events, or the need for heart transplantation. The study will conclude when a specified number of participants experience a heart failure event or cardiovascular death, with an interim analysis planned for efficacy and futility.

Why it matters

Potential benefit: If successful, this treatment could significantly reduce the risk of severe complications associated with heart failure, improving patient outcomes.

How similar studies have gone: Previous studies have shown promise with similar approaches, but this specific drug and its application in this patient population are being evaluated in a novel context.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

Adult patients who meet all the following criteria at screening may be included in the study:

* Are between ≥ 18 years and ≤ 85 years at the signing of informed consent
* Have a history of chronic HFrEF, defined as requiring treatment for HF for a minimum of 3 months prior to screening
* Are receiving oral loop diuretics on a regular schedule
* Patients without AFF on screening ECG:

  * LVEF \< 30% within 6 months of screening
  * Elevated N-terminal prohormone of B-type natriuretic peptide (NT-proBNP) ≥ 1000 pg/mL (BNP ≥ 300 pg/mL)
* Patients with AFF on screening ECG:

  * LVEF \< 25% within 6 months of screening
  * Elevated N-terminal prohormone of B-type natriuretic peptide (NT-proBNP) ≥ 3000 pg/mL (BNP ≥ 900 pg/mL)
  * Not currently taking digoxin
* Meet one of the following criteria for a recent HF event:

  * Are currently hospitalized with the primary reason of HF
  * Had an HF event (as defined in the primary endpoint) within 12 months prior to screening. For the purposes of a qualifying HF event, subcutaneous furosemide will be treated as equivalent to intravenous furosemide Or
  * Had outpatient escalation of oral diuretics due to worsening signs and symptoms of heart failure plus one of two additional criteria sustained for at least 1 week: (1) at least 50% or 1.5-fold increase in daily loop-diuretic-equivalent dose; (2) the addition of a new diuretic class to a loop diuretic.
* Are established on regional standard-of-care HF therapies for at least 30 days prior to screening
* Systolic blood pressure ≤ 140 mmHg

Exclusion Criteria:

Any of the following criteria will exclude potential patients from the study:

* Have AFF on the screening ECG and are currently taking digoxin
* Have had any event or procedure that may have resulted in a change in ejection fraction, including, but not limited to, acute coronary syndrome and/or any coronary revascularization, cardiac surgery, valve surgery, any coronary revascularization, and/or cardiac resynchronization, or cardiac contractility modulation therapy within 3 months of screening
* Are admitted to a long-term care facility or hospice
* Have a projected survival of \< 12 months due to non-cardiovascular causes based on clinical judgment
* Are receiving intravenous inotropes or intravenous vasopressors ≤ 3 days prior to screening
* Are receiving mechanical hemodynamic support or mechanical ventilation ≤ 7 days prior to screening
* Are receiving intravenous diuretics, intravenous vasodilators, or supplemental oxygen therapy ≤ 12 hours prior to screening (except for nocturnal supplemental oxygen for sleep apnea or heart failure)
* Have an estimated glomerular filtration rate (eGFR) \< 20 mL/min/1.73m2 or receiving dialysis at screening
* Have previously had a solid organ transplant
* Are receiving treatment in another investigational device or drug study or are within 30 days of ending such investigational treatment at screening
* Have received omecamtiv mecarbil in a previous clinical trial
* Are pregnant or planning pregnancy during the study period, or planning to breastfeed during treatment with IP or within 5 days after the end of treatment with IP
* Have primary infiltrative cardiomyopathy (e.g. cardiac amyloidosis) or severe stenotic valvular disease

Where it's running

  • Advanced Cardiovascular, LLC
    Alexander City, Alabama, United States
    Recruiting
  • University of Alabama at Birmingham
    Birmingham, Alabama, United States
    Recruiting
  • National Heart Institute
    Beverly Hills, California, United States
    Recruiting
  • UC San Diego Health - Sulpizio Cardiovascular Center
    La Jolla, California, United States
    Recruiting
  • Nutrition Research Center (SPH)
    Loma Linda, California, United States
    Recruiting
  • Keck Medical Center of USC (outpatient clinic)
    Los Angeles, California, United States
    Recruiting
Show 44 more locations
  • UCLA Medical Center Cardiovascular Clinic
    Los Angeles, California, United States
    Recruiting
  • University of California, Irvine Medical Center
    Orange, California, United States
    Recruiting
  • Sutter Institute for Medical Research (SIMR)
    Sacramento, California, United States
    Recruiting
  • UC Davis Health
    Sacramento, California, United States
    Recruiting
  • San Diego Cardiac Center
    San Diego, California, United States
    Recruiting
  • California Pacific Medical Center Van Ness Campus
    San Francisco, California, United States
    Recruiting
  • Kaiser Permanente Santa Clara
    Santa Clara, California, United States
    Recruiting
  • Stanford University Hospital / Stanford Health Care
    Stanford, California, United States
    Recruiting
  • Lundquist Institute for Biomedical Innovation at Harbor - UCLA Medical Center
    Torrance, California, United States
    Recruiting
  • Rocky Mountain Regional VA Medical Center
    Aurora, Colorado, United States
    Recruiting
  • Cardiology Associates of Fairfield County, P.C
    Bridgeport, Connecticut, United States
    Recruiting
  • Hartford Hospital
    Hartford, Connecticut, United States
    Recruiting
  • Yale New Haven Health Heart & Vascular Center Outpatient Services
    New Haven, Connecticut, United States
    Recruiting
  • CHF Heart Clinical (Subject Visits & IP Shipments)
    Clearwater, Florida, United States
    Recruiting
  • Holy Cross Medical Group - Cardiology Associates
    Fort Lauderdale, Florida, United States
    Recruiting
  • South Florida Research Solutions, LLC
    Hollywood, Florida, United States
    Recruiting
  • UF Health Jacksonville
    Jacksonville, Florida, United States
    Recruiting
  • Broward Research Center
    Miami Beach, Florida, United States
    Recruiting
  • Ocala Cardiovascular Research
    Ocala, Florida, United States
    Recruiting
  • AdventHealth
    Orlando, Florida, United States
    Recruiting
  • USF Health South Tampa Center for Advanced Healthcare
    Tampa, Florida, United States
    Recruiting
  • Saint Josephs Hospitals
    Tampa, Florida, United States
    Recruiting
  • Grady Health System
    Atlanta, Georgia, United States
    Recruiting
  • Piedmont Atlanta Hospital
    Atlanta, Georgia, United States
    Recruiting
  • Emory Clinic
    Atlanta, Georgia, United States
    Recruiting
  • Piedmont Fayette Hospital
    Fayetteville, Georgia, United States
    Recruiting
  • The Queen's Medical Center - Punchbowl
    Honolulu, Hawaii, United States
    Recruiting
  • Midwest Cardiovascular Institute
    Naperville, Illinois, United States
    Recruiting
  • Cardiovascular Research of Northwest Indiana, LLC.
    Munster, Indiana, United States
    Recruiting
  • Deaconess Heart Group
    Newburgh, Indiana, United States
    Recruiting
  • Reid Physician Associates
    Richmond, Indiana, United States
    Recruiting
  • The University of Kansas Medical Center
    Kansas City, Kansas, United States
    Recruiting
  • AHMG Cardiology and Surgery
    Overland Park, Kansas, United States
    Recruiting
  • University Medical Center New Orleans
    New Orleans, Louisiana, United States
    Recruiting
  • Eastern Main Medical Center dba Northern Light Eastern Maine Medical Center
    Bangor, Maine, United States
    Recruiting
  • University of Maryland Medical Center
    Baltimore, Maryland, United States
    Recruiting
  • Tufts Medical Center
    Boston, Massachusetts, United States
    Recruiting
  • Henry Ford Hospital
    Detroit, Michigan, United States
    Recruiting
  • Saint Luke's Hospital of Kansas City
    Kansas City, Missouri, United States
    Recruiting
  • Washington University Center for Advanced Medicine
    St Louis, Missouri, United States
    Recruiting
  • University of Nebraska Medical Center
    Omaha, Nebraska, United States
    Recruiting
  • Advanced Heart Care, LLC
    Bridgewater, New Jersey, United States
    Recruiting
  • Monmouth Cardiology Associates, LLC
    Eatontown, New Jersey, United States
    Recruiting
  • Capital Cardiology Associates
    Albany, New York, United States
    Recruiting

+163 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.