Antioxidant infusion may shield the heart from reperfusion injury
NCT ID NCT07776288
First seen Aug 20, 2026 · Last updated Aug 21, 2026 · Updated 1 time
Summary
This phase 2 trial tests whether a combined antioxidant therapy—ascorbate, N-acetylcysteine, and deferoxamine—can reduce heart muscle damage when given before and during angioplasty for a first anterior ST-elevation heart attack. Adults eligible for primary PCI will be randomly assigned to receive the antioxidant infusion or a placebo, alongside standard care. The main goal is to see if the therapy lowers infarct size, measured by cardiac MRI a few days later, and improves heart function and blood markers of injury. Participants will be followed for 30 days to assess safety and short-term outcomes.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- A combined antioxidant therapy consisting of ascorbate (vitamin C), N-acetylcysteine, and deferoxamine, given as an infusion before and during primary PCI.
- What this could lead to
- If it works, this could lead to a simple, add-on treatment that limits permanent heart muscle damage after a heart attack, potentially improving recovery and reducing future heart failure risk.
- What could go wrong
- This is a small, early-phase trial, so results may not hold up in larger studies. The therapy could also cause side effects or fail to show a meaningful benefit over standard care.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 46 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Sep 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age 18 years or older * First anterior ST-segment elevation myocardial infarction (STEMI) * Symptom onset within 6 hours before presentation * Eligible for primary percutaneous coronary intervention (PCI) * Provision of informed consent by the participant or a legally authorized representative, according to local ethics requirements Exclusion Criteria: * Prior myocardial infarction * Cardiogenic shock, defined as Society for Cardiovascular Angiography and Interventions (SCAI) shock class D or E. * Prior thrombolytic therapy for the index event. * Chronic kidney disease, defined as serum creatinine greater than 1.5 mg/dL or dialysis. * Liver cirrhosis * Advanced heart failure, defined as New York Heart Association (NYHA) class III or IV * Glucose-6-phosphate dehydrogenase (G6PD) deficiency * Nephrolithiasis * Life expectancy less than 6 months * Implanted cardiac device, including pacemaker, implantable cardioverter-defibrillator, or cardiac resynchronization device * Prior coronary artery bypass graft (CABG) surgery * Pregnancy * Claustrophobia * Other contraindications to cardiac magnetic resonance imaging (CMR), according to local protocol
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Hospital San Juan de Dios
Santiago, Santiago Metropolitan, 8170000, Chile
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