Could vitamin d help heart surgery patients recover better?

NCT ID NCT04986033

Completed Knowledge-focused Sponsor: Yonsei University Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at 135 adults having off-pump coronary artery bypass surgery to see if vitamin D levels affect hemoglobin (a protein in red blood cells) recovery after surgery. Researchers measured vitamin D and a hormone called hepcidin, which controls iron use. The goal was to understand why many patients develop anemia after heart surgery and whether vitamin D plays a role.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this could help doctors understand why some patients develop anemia after heart surgery and point to vitamin D as a potential way to improve recovery.
What could go wrong: This is an observational study, not a treatment trial. It only looks for links between vitamin D and hemoglobin, so it won't prove that giving vitamin D helps. Results may not apply to all heart surgery patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

coronary artery disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

CORONARY ARTERY DISEASE

Contacts and locations

Locations

Division of Cardiac Anesthesiology, Department of Anesthesiology and Pain Medicine, Cardiovascular Hospital, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea

Seoul, South Korea

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