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.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 85 Years |
| Sex | All |
| Enrollment | 1800 (estimated) |
| Sponsor | Cytokinetics Industry-sponsored |
| Locations | 213 sites (Alexander City, Alabama and 212 other locations) |
| Status | Recruiting |
| Started | December 19, 2024 |
| Main results expected | September 2027 |
| Study ends | December 2027 |
| Registry record updated | November 4, 2026 |
| Trial ID | NCT06736574 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
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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
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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
- Study coordinator: Cytokinetics MD
- Email: medicalaffairs@cytokinetics.com
- Phone: (650) 624-2929
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Using Apple Watch data to predict heart failure outcomes
This study is testing if data from Apple Watches can help predict heart failure problems and the chances of needing to go back to the hospital for patients with heart failure.
-
Stepwise withdrawal of ARNI and SGLT2i in HF with normalized ejection fraction
This trial tests whether gradually stopping ARNI and SGLT2i is safe for people whose heart function has recovered after fixing a reversible heart‑disease cause.
-
Pulmonary Artery Denervation for a specific type of heart and lung pressure problem
This study tests whether the Enhancor System can safely and effectively help patients with combined pre- and post-capillary pulmonary hypertension due to left heart disease when added to standard therapy.
-
Observational study of heart failure patients in Vietnam
This study is looking to gather information about heart failure patients in Vietnam to see how they are doing after leaving the hospital and how different treatments affect their health over time.
-
Diet-management app and smart scale for weight loss in people with heart failure and obesity
This tests whether using a diet-management phone app at each meal plus a smart weight scale daily for 12 months helps people with heart failure and obesity live longer, avoid hospital stays, and feel less frail.
-
Using colchicine to treat acutely decompensated heart failure with reduced ejection fraction
This study is testing if colchicine, an anti-inflammatory medication, can help people in the hospital with heart failure feel better and improve their heart function.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.