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Influenza Vaccination After Acute Coronary Syndrome

Influenza Vaccination After Acute Coronary Syndrome

Status
Recruiting
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07259252
Acronym
InVaACS
Enrollment
6620
Registered
2025-12-02
Start date
2025-12-03
Completion date
2029-03-30
Last updated
2026-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Acute Coronary Syndromes (ACS)

Brief summary

The goal of this clinical trial is to learn if influenza vaccination can prevent adverse cardiac events in Chinese acute coronary syndrome patients. The main questions it aims to answer are: * Whether influenza vaccination can decrease events of cardiovascular death, MI, or stroke? * Whether influenza vaccination can decrease events of all cause death, unplanned revascularization, unplanned hospitalization for heart failure or for arrhythmia, stent thrombosis? If there is a comparison group: Researchers will compare influenza vaccination and placebo to see if adverse cardiac events decrease. Participants will receive an influenza vaccination or placebo after enrollment and phone calls for follow-up at 1 month, 3 months, 6 months and 1 year after discharge.

Interventions

DRUGInfluenza vaccine

Patients receive injection of 0.5ml influenza vaccine

DRUGPlacebo

Patients will receive injection of 0.5ml PBS

Sponsors

Tongji Hospital
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

1. ACS patient aged from 18 to 80 years. 2. Volunteer for the study and written informed consent.

Exclusion criteria

1. Participate in any drug clinical trials within 3 months. 2. Patients with life-threatening complications, or the researchers determined that the survival time of patients with no more than 1 years. 3. Serious neurological disease (Alzheimer's disease, Parkinson syndrome, progressive lower limbs or deaf patients). 4. Previous history of cancer or tumor, or pathological examination confirmed precancerous lesions (such as breast ductal carcinoma in situ, or atypical hyperplasia of the cervix). 5. Patients refused to comply with the requirements of this study to complete the research work. 6. Patients Received influenza vaccination within 1 year. 7. Patients with contraindications for influenza vaccination.

Design outcomes

Primary

MeasureTime frameDescription
Composite endpoint of cardiovascular death, myocardial infarction or stroke12 monthsThe number of participants with cardiovascular death, myocardial infarction or stroke (first occurring) till 12 months.

Secondary

MeasureTime frameDescription
cardiovascular death12 monthsThe number of participants with cardiovascular death till 12 months
unplanned revascularization12 monthsThe number of participants with unplanned revascularization till 12 months
stent thrombosis12 monthsThe number of participants with stent thrombosis till 12 months
myocardial infarction12 monthsThe number of participants with myocardial infarction till 12 months
all cause death12 monthsThe number of participants with all cause death till 12 months
stroke12 monthsThe number of participants with stroke till 12 months
unplanned hospitalization for heart failure or for arrhythmia12 monthsThe number of participants with unplanned hospitalization for heart failure or for arrhythmia till 12 months

Other

MeasureTime frameDescription
hospitalization for influenza12 monthsThe number of participants with hospitalization for influenza till 12 months
influenza like illness12 monthsThe number of participants with fever (body temperature ≥38℃) accompanied by cough or sore throat till 12 months

Countries

China

Contacts

Primary ContactYang Sun
sunyang.7@163.com+86-15527674573

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026