This study is looking at how a measurement called the superior vena cava collapsibility index (SVC-CI) can help doctors understand if a patient needs more fluids during coronary artery bypass grafting (CABG) surgery. This surgery helps improve blood flow to your heart. Researchers will observe how your body responds to a temporary change in operating room table position, which mimics giving you extra fluids. They will measure your heart's output before and after this change. The goal is to find a specific SVC-CI value that helps doctors decide who will benefit from more fluids. You may be eligible if you are at least 18 years old, having CABG surgery, and can consent for yourself. This is an observational study, meaning researchers will watch and collect information without giving you a new treatment.

Study design

This is an observational study involving 120 participants undergoing CABG surgery. It is not specified if it is randomized or blinded.

What's involved

You will have cardiac output measurements taken at two times during your surgery. Your operating room table position will be changed for 60-90 seconds, adding about 10 minutes to your surgery time.

Compensation

Not stated in the trial record.

Follow-up

Not specified.

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