Recent Updates
Recently added Catalysts

omecamtiv mecarbil

Phase 3

Heart Failure | Small molecule | Cardiovascular |Cytokinetics, Incorporated|Last Updated: May 5, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials4
Total Enrollment10,705
FDA Designations
No designations recorded
Clinical Trials (4)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06736574Study With Omecamtiv Mecarbil (CK-1827452) to Treat Chronic Heart Failure With Severely Reduced Ejection FractionPHASE3 RECRUITING 1,800Dec 19, 2024Dec 1, 2027May 5, 2026185 United States, Canada +7
NCT02929329Registrational Study With Omecamtiv Mecarbil (AMG 423) to Treat Chronic Heart Failure With Reduced Ejection FractionPHASE3 COMPLETED 8,256Jan 6, 2017Sep 14, 2020Nov 5, 20211033 United States, Argentina +34
NCT01300013Study to Evaluate the Safety and Efficacy of IV Infusion Treatment With Omecamtiv Mecarbil in Subjects With Left Ventricular Systolic Dysfunction Hospitalized for Acute Heart Failure (ATOMIC-AHF)PHASE2 COMPLETED 614Apr 1, 2011Sep 1, 2013Jul 27, 2021150 United States, Australia +17
NCT01380223A Pharmacokinetic and Pharmacodynamic Study of Omecamtiv Mecarbil in Healthy VolunteersPHASE1 COMPLETED 35Aug 1, 2005Apr 1, 2006Oct 14, 20151 United Kingdom
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Time to the first of event of CV death, HF event, LVAD implantation/cardiac transplantation, or stroke
From randomization to the first event of CV death or HF event, whichever occurs first, assessed until the last patient exits the study, estimated to last about 3 years

Efficacy of omecamtiv mecarbil compared with placebo on the risk of HF outcomes in patients with symptomatic HFrEF and severely reduced ejection fraction in the setting of guideline-directed medical therapy per local standard of care.

Time to Cardiovascular Death or First Heart Failure Event
From randomization to up to earliest of last confirmed survival status date or analysis cut-off date (07 August 2020); the overall median duration of follow-up was 21.8 months up to a maximum of 42 months.

The primary outcome was a composite of a heart-failure (HF) event or cardiovascular (CV) death, whichever occurred first, in a time-to-event analysis. A heart-failure event was defined as an urgent clinic visit, emergency department visit, or hospitalization for subjectively and objectively worsening heart failure leading to treatment intensification beyond a change in oral diuretic therapy. All deaths and HF events were adjudicated by an independent external clinical events committee (CEC) at the Duke Clinical Research Institute, using standardized definitions based on the recent American College of Cardiology/American Heart Association (ACC/AHA) standards for endpoint definitions in cardiovascular clinical trials. Time to cardiovascular death or first HF event was analyzed using Kaplan-Meier (KM) methods. Since the median was not calculated, the percentage of participants with a positively adjudicated event during the study is reported.

The primary objective of the study is to evaluate the effect of 48 hours of intravenous (IV) omecamtiv mecarbil compared with placebo on dyspnea in subjects with left ventricular systolic dysfunction hospitalized for acute heart failure.
48 hours
Maximum Tolerated Dose (MTD) of Omecamtiv Mecarbil in Healthy Volunteers
2 days

The highest infusion rate tolerated by at least eight subjects. A dose was intolerable if: 1) the pattern of intolerance clearly distinguished active drug from placebo, or 2) the number of subjects intolerant of the dose level in question was at least 3 more than the number of subjects intolerant of placebo.

Secondary Endpoints
Time to the first event of CV death or HF event
From randomization to the first event of CV death or HF event, whichever occurs first, assessed until the last patient exits the study, estimated to last about 3 years
Time to the first HF hospitalization
From randomization to the first event of CV death or HF event, whichever occurs first, assessed until the last patient exits the study, estimated to last about 3 years
Time to the first event of CV death, HF event, LVAD implantation/cardiac transplantation, or stroke in a subgroup of patients with severe HF
From randomization to the first event of CV death or HF event, whichever occurs first, assessed until the last patient exits the study, estimated to last about 3 years
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Omecamtiv MecarbilEXPERIMENTALParticipants randomized to omecamtiv mecarbil will be dosed based on their omecamtiv mecarbil plasma concentration at 25, 37.5 or 50 mg twice daily until at least 850 participants experience a HF event or CV death, whichever comes first.
PlaceboPLACEBO_COMPARATORParticipants randomized to placebo will receive placebo twice daily until at least 850 participants experience a HF event or CV death, whichever comes first.
Dose-escalation Cohort 1EXPERIMENTAL4 treatment periods consisting of a 2 hour placebo infusion (single blind) followed by a 6 hour infusion of study drug or placebo. Each subject will receive 3 active ascending doses of study drug and 1 dose of placebo randomized into the sequence of escalating doses in a double-blind manner. Treatment periods occur at least 7 days apart.
Dose-escalation Cohort 2EXPERIMENTAL4 treatment periods consisting of a 2 hour placebo infusion (single blind) followed by a 6 hour infusion of study drug or placebo. Each subject will receive 3 active ascending doses of study drug and 1 dose of placebo randomized into the sequence of escalating doses in a double-blind manner. Treatment periods occur at least 7 days apart.
Dose-escalation Cohort 3EXPERIMENTAL4 treatment periods consisting of a 2 hour placebo infusion (single blind) followed by a 6 hour infusion of study drug or placebo. Each subject will receive 3 active ascending doses of study drug and 1 dose of placebo randomized into the sequence of escalating doses in a double-blind manner. Treatment periods occur at least 7 days apart.
Dose-escalation Cohort 4EXPERIMENTAL4 treatment periods consisting of a 2 hour placebo infusion (single blind) followed by a 6 hour infusion of study drug or placebo. Each subject will receive 3 active ascending doses of study drug and 1 dose of placebo randomized into the sequence of escalating doses in a double-blind manner. Treatment periods occur at least 7 days apart.
Interventions
NameTypeDescription
Omecamtiv Mecarbil (OM)DRUGOral Tablet
PlaceboDRUGOral Tablet
Omecamtiv MecarbilDRUGOmecamtiv mecarbil tablets for oral administration
Standard of CareDRUGParticipants were required to be optimally managed with standard of care therapies for chronic HF (eg, beta blockers, renin angiotensin aldosterone system inhibitors), consistent with regional clinical practice guidelines, unless contraindicated.
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years — 85 Years
SexALL
Healthy VolunteersNo
Study Sites185

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 s...

Countries:United StatesCanadaFranceGermanyGreeceItalyPolandSpainUnited KingdomArgentinaAustraliaAustriaBelgiumBrazilBulgariaChileChinaColombiaCzechiaDenmarkHungaryJapanLithuaniaMexicoNetherlandsNew ZealandPortugalPuerto RicoRomaniaRussiaSlovakiaSouth AfricaSwedenSwitzerlandTurkey (Türkiye)UkraineFinlandNorway
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06736574primaryCompletionDate: changed
LOWMay 24, 2026NCT06736574studyFirstPostDate: changed