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Can common heart-surgery practices trigger delirium? a 5,600-patient hunt for clues.

NCT ID NCT02548975

Knowledge-focused Sponsor: Vanderbilt University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 24, 2026 · Last updated Jul 24, 2026

Summary

This study tracks thousands of heart-surgery patients to identify factors that may increase the risk of postoperative delirium — a state of sudden confusion. Researchers are examining whether medications like statins and beta blockers, the use of a heart-lung machine, or the length of surgery play a role. The goal is to pinpoint modifiable risks that could help prevent delirium in future patients.

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 clear risk factors are identified, doctors may adjust care before and during heart surgery to lower the chance of postoperative delirium.
What could go wrong
This is an observational study, so it can find links but cannot prove cause and effect. Many factors beyond those measured could influence delirium risk.

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.

Participants

5,600 people

The number who actually took part.

Start date

Nov 2009

Finished

Nov 2016

Lead sponsor

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.

Who is studied

Cardiac surgery patients over 18 years old at Vanderbilt University Medical Center

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: Patients undergoing elective cardiac surgery (coronary artery bypass grafting (CABG), CABG+valve(s), valve only) \*depending on the study - OR aortic valve replacement (will include patients undergoing transcatheter aortic valve replacement (TAVR) and patients undergoing only aortic valve replacement with CPB) Exclusion Criteria: Emergency cases will be excluded. \*depending on the study - Patients undergoing any valve replacement surgery other than aortic valve

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Conditions

The condition(s) this trial relates to.

aortic valve stenosis coronary artery disorder delirium Emergence Delirium

As listed by the trial registrant

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

Delirium

More trials for these conditions

Other studies related to the condition(s) this trial covers.