Vericiguat in Pediatric Participants With Heart Failure Due to Left Ventricular Systolic Dysfunction (MK-1242-043)

September 19, 2025 updated by: Merck Sharp & Dohme LLC

A Phase 3, Single-arm, Open-label Extension of the Vericiguat VALOR Study in Pediatric Participants With Heart Failure Due to Systemic Left Ventricular Systolic Dysfunction (VALOR EXT)

The primary objective of this study is to monitor the safety and tolerability of vericiguat.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
6

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Colombia
    • Antioquia
      • Rionegro, Antioquia, Colombia, 054040
        • Clinica Somer-Unidad de Investigacion y Docencia ( Site 0607)
    • Valle del Cauca Department
      • Santiago de Cali, Valle del Cauca Department, Colombia, 760032
        • Fundacion Valle del Lili- CIC ( Site 0604)
  • Hungary
      • Budapest, Hungary, 1096
        • Gottsegen György Országos Kardiovaszkuláris Intézet-Gyermeksziv Kozpont ( Site 1300)
  • Ireland
      • Dublin, Ireland, D12 N512
        • Children's Health Ireland (CHI) at Crumlin ( Site 1400)
  • Thailand
      • Chiang Mai, Thailand, 50200
        • Maharaj Nakorn Chiang Mai Hospital-Department of Pediatrics ( Site 3201)
    • Bangkok
      • Thailand, Bangkok, Thailand, 10700
        • Faculty of Medicine Siriraj Hospital ( Site 3200)
  • United States
    • Tennessee
      • Memphis, Tennessee, United States, 38103
        • Le Bonheur Children's Hospital ( Site 0007)

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Was randomized, received at least 1 dose of study intervention (vericiguat or placebo), and completed the Week 52 visit and safety follow-up period for the VALOR base study.
  • A participant assigned female sex at birth is not pregnant or breastfeeding, and is not a participant/participants of childbearing potential (POCBP) or is a POCBP who Uses a contraceptive method that is highly effective, has a negative highly sensitive pregnancy test, abstains from breastfeeding during the study intervention period and for at least 30 days after study intervention., and whose medical history, menstrual history, and recent sexual activity has been reviewed by the investigator to decrease the risk for inclusion of a POCBP with an early undetected pregnancy.
  • Is able to receive medication via the oral or gastric route .

Exclusion Criteria:

  • Is hypotensive for age at Visit 1
  • Has a known allergy or sensitivity to vericiguat, any of its constituents, or any other soluble guanylate cyclase (sGC )stimulator.
  • Has undergone heart transplantation or has an implanted ventricular assist device.
  • Has severe chronic kidney disease
  • Has hepatic disorder
  • Has concurrent or anticipated concomitant use of phosphodiesterase type 5 inhibitors during the study.
  • Has concurrent or anticipated use of an sGC stimulator.
  • Is both ≥18 years of age and vericiguat is commercially available to the participant

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Vericiguat
Vericiguat administered orally in either tablet or suspension once daily until end of treatment
Drug: Vericiguat tablet
Vericiguat tablet at doses 2.5 mg, 5 mg, or 10 mg taken orally once daily
Other Names:
  • MK-1242
Drug: Vericiguat suspension

Vericiguat suspension at doses 0.2 mg/mL,

1 mg/mL taken orally once daily

Other Names:
  • MK-1242

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Participants with adverse events (AEs)
Time Frame: Up to approximately 8 years
Percentage of participants with AEs
Up to approximately 8 years
Participants who discontinued study drug due to an AE
Time Frame: Up to approximately 8 years
Percentage of participants who discontinued study drug due to an AE
Up to approximately 8 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change from baseline in n-terminal pro-brain natriuretic peptide (NT-proBNP)
Time Frame: Baseline and Week 16
Change in NT-proBNP from baseline at Week 16.
Baseline and Week 16

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Merck Sharp & Dohme LLC

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Clinical Director, Merck Sharp & Dohme LLC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 3, 2024

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 15, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 15, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 20, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 20, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 24, 2024

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 23, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 19, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 1242-043
  • MK-1242-043 (Other Identifier: MSD)
  • 2023-506210-40-00 (Registry Identifier: EU CT)
  • U1111-1293-4744 (Registry Identifier: UTN)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

https://trialstransparency.msdclinicaltrials.com/pdf/ProcedureAccessClinicalTrialData.pdf

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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