Effects of Ziltivekimab on Coronary Atherosclerotic Burden in Patients With Acute Myocardial Infarction
ZEPHYR
Effects of Ziltivekimab Versus Placebo on Coronary Atherosclerosis in Patients With Acute Myocardial Infarction. A Serial, Multivessel, Intravascular Ultrasound, Near-infrared Spectroscopy and Optical Coherence Tomography Imaging Study
3 other identifiers
interventional
332
1 country
1
Brief Summary
Despite improvements in the treatment, coronary artery disease (CAD) remains one of the leading causes of death worldwide. Around 20% of people who have suffered a heart attack (myocardial infarction) need to be hospitalized again within a year, and 10% experience another heart attack. Despite currently available medication, patients remain at risk of further episodes after a heart attack. Scientists have discovered that inflammation in the body plays a decisive role in the development and narrowing of arterial blockages (atherosclerosis). This study aims to investigate whether a new treatment that reduces inflammation can help improve the arteries of patients with CAD. This study will examine whether blocking certain inflammation-related substances with a new medicinal product called ziltivekimab affects the buildup and composition of plaques (fatty deposits) in the coronary arteries. Special imaging diagnostic techniques will be used to look inside the arteries and check whether the treatment helps reduce the narrowing caused by dangerous plaques, which can lead to future heart attacks. This is a clinical study in which participants are randomly divided into two groups (randomization): one group will receive the new treatment ziltivekimab and other group will receive a placebo (a harmless substance with no active ingredients). Both groups will continue to receive standard treatment for heart attacks. The study lasts approximately 15 months per participant. The full scientific title of the trial is: Effects of ziltivekimab versus placebo on coronary atherosclerosis in patients with acute myocardial infarction. A study with serial multi-vessel imaging obtained using intravascular ultrasound, near-infrared spectroscopy, and optical coherence tomography techniques.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for phase_3 coronary-artery-disease
Started Dec 2025
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
November 28, 2025
CompletedFirst Posted
Study publicly available on registry
December 11, 2025
CompletedStudy Start
First participant enrolled
December 19, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
September 1, 2028
ExpectedStudy Completion
Last participant's last visit for all outcomes
December 1, 2028
March 23, 2026
March 1, 2026
2.7 years
November 28, 2025
March 20, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Change in percent atheroma volume
Change in percent atheroma volume (PAV) as determined by greyscale intravascular ultrasound (IVUS) in matched regions of interest. Theoretical change is between -100% to +100%. Typical range around -2% to +2%. A lower (more negative) change in PAV is better.
From randomization (week 0) to end-of-study (52-week)
Secondary Outcomes (2)
Maximum lipid core burden index
From randomisation (week 0) to end-of-study (52-week)
Minimal fibrous cap thickness
From randomisation (week 0) to end-of-study (52-week)
Study Arms (2)
Ziltivekimab Arm
EXPERIMENTALParticipants will receive Ziltivekimab subcutaneously once per month
Placebo Arm
PLACEBO COMPARATORParticipants will receive placebo subcutaneously once per month
Interventions
Placebo is administered subcutaneously (i.e., under the skin) once per month added to standard of care.
Ziltivekimab is administered subcutaneously (i.e., under the skin) once per month added to standard of care.
Eligibility Criteria
You may qualify if:
- Informed consent obtained before any study-related activities.
- Age 18 years or above at the time of providing informed consent.
- Acute myocardial infarction, with at least one coronary segment (culprit lesion) treated with PCI.
- At least two major native coronary arteries each meeting angiographic criteria for intracoronary imaging immediately following the qualifying PCI procedure.
You may not qualify if:
- Known or suspected hypersensitivity to study intervention(s) or related products.
- Known allergy to contrast medium, heparin, aspirin, ticagrelor or prasugrel.
- Female of childbearing potential.
- Left-main disease.
- Three-vessel disease.
- History of coronary artery bypass surgery.
- TIMI flow \<2 of the infarct-related artery after PCI.
- Unstable clinical status (hemodynamic or electrical instability.
- Significant coronary calcification or tortuosity deemed to preclude IVUS, NIRS and OCT evaluation.
- Uncontrolled cardiac arrhythmia.
- Severe kidney impairment.
- Active liver disease or hepatic dysfunction.
- Current use of anti-IL-6 products or anticipated use of such drugs any time during the study.
- Use of systemic immunosuppressive drugs or disease modifying anti-rheumatic drugs or anticipated chronic use of such drugs any time during the study.
- Known, or suspicion of, active infection or major hematologic, metabolic, or endocrine dysfunction in the judgment of the Investigator
- +8 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- ECRI bvlead
- Novo Nordisk A/Scollaborator
- Insel Gruppe AG, University Hospital Berncollaborator
- Cardialysis B.V.collaborator
Study Sites (1)
Bern University Hospital, Inselspital Bern
Bern, Switzerland
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Lorenz Räber, MD, PhD
Cardiology Department, Bern University Hospital, Inselspital Bern, Switzerland
- STUDY DIRECTOR
Ernest Spitzer, MD
European Cardiovascular Research Institute
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- phase 3
- Allocation
- RANDOMIZED
- Masking
- QUADRUPLE
- Who Masked
- PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
- Masking Details
- Clinical Research Organization, Data Coordinating Center, Core Laboratories
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- INDUSTRY
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
November 28, 2025
First Posted
December 11, 2025
Study Start
December 19, 2025
Primary Completion (Estimated)
September 1, 2028
Study Completion (Estimated)
December 1, 2028
Last Updated
March 23, 2026
Record last verified: 2026-03
Data Sharing
- IPD Sharing
- Will not share