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CT scans could make bypass surgery smarter

NCT ID NCT03894423

Disease control Sponsor: Stanford 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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether advanced CT imaging can help doctors plan better coronary bypass surgery for 200 people with heart disease. Participants get a CT scan before and after surgery to measure blood flow changes. The goal is to improve surgical decisions and reduce chest pain, but the surgery itself is standard care, not a cure.

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

About 200 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2019

Expected to finish

Dec 2030

An estimate. End dates often move.

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

Patients scheduled to undergo coronary bypass graft surgery

Ages

40 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Planned elective CABG for coronary artery disease. * CABG is the primary indication for surgery (but may include treatment of mild-moderate valvular disease). * Age: ≥40 years. Exclusion Criteria: * Technical feasibility of the cardiac CT exams: redo-CABG, significant arrhythmia/mal-conduction, congenital conditions, severe valvular disease or cardiomyopathy (to the extent that the CT acquisition is technically challenged), inadequate understanding of the English language (to provide consent or follow instructions during the exams). * Overall safety: unstable clinical condition (clinical heart failure, unstable angina, myocardial infarction \<1 month prior). * Radiation risk: pregnancy (cannot be ruled out), body weight \>100kg. * CT contrast medium-related: known allergy, renal failure * Vasodilator related: known allergy, bronchial asthma requiring daily use of bronchodilators, Mobitz II or 3rd degree AV block, sick sinus node disease, clinically significant carotid artery narrowing, severe aortic stenosis or LVOT narrowing, systolic blood pressure below 90mmHg, (continued) use of dipyridamole or aminophylline. * Inability to provide informed consent.

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Conditions

The condition(s) this trial relates to.

coronary artery disorder coronary atherosclerosis

As listed by the trial registrant

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

Atheroscleroses, coronary CAD Computed tomography Coronary artery bypass

Contacts and locations

Locations

  • Palo Alto Veterans Affaird Healthcare System

    Palo Alto, California, 94304, United States

  • Stanford University

    Palo Alto, California, 94304, United States

  • University of California San Diego

    San Diego, California, 92093, United States

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