This study is looking at whether exposure to bright light before and after heart surgery can help patients. Researchers are testing two types of light: "Day Light" (bright light) and "Placebo light" (dim light). You would be exposed to one of these lights for up to 10 days before surgery, and if you are in the ICU, for up to 10 days after surgery. The main goal is to see how these lights affect levels of a protein called Per2 in your body. They also want to see if bright light can lead to lower levels of Troponin I (a marker of heart damage) after surgery. This study is for people aged 18 to 90 who are having their first open-heart surgery and are in a normal heart rhythm. The study is currently unclear on its recruitment status and plans to enroll 70 participants.

Study design

This interventional study plans to enroll 70 participants. It compares bright light exposure to placebo light exposure both before and after cardiac surgery.

What's involved

You would use a light box for 30 minutes each morning for 7 days before surgery. Blood and buccal swab samples would be collected before and after this light therapy, and a small piece of heart tissue would be taken during surgery. Another blood sample would be taken 72 hours after surgery.

Compensation

Not stated in the trial record.

Follow-up

Blood samples will be collected 72 hours after surgery to measure Troponin I levels.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.