Metoprolol to Reduce Perioperative Myocardial Injury (ORION)

January 9, 2026 updated by: University of Chicago
The purpose of this research study is to test if a commonly used, FDA-approved medication, called metoprolol, given at the conclusion of anesthesia following surgery, and during postoperative admission, reduces the possibility of heart related complications in patients with coronary artery disease (CAD).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

All enrolled patients will be beta-blocker naïve for at least 30-days prior to their scheduled surgical procedure. Study patients will be randomly assigned to an interventional drug arm (metoprolol tartrate vs placebo-comparator). At the conclusion of anesthesia following the surgical procedure, patients hemodynamically stable and meeting study safety parameters (heart rate greater-than-65; systolic blood pressure greater-than-110) will receive 3-intravenous doses of interventional study drug (metoprolol tartrate 5mg or placebo-comparator), based on previously assigned study arm; then, patients remaining hemodynamically stable will receive an oral dose (25mg metoprolol vs placebo-comparator) approximately every 8-hours for up to 3-days during postoperative hospital admission.

From arrival in the preop holding area through up to 72 hours postoperative admission to hospital discharge or end of study treatment (whichever occurs first), patients will be continuously monitored through medical records assessments, Holter monitoring, mobile hemodynamic monitoring (VisiMobile), and in-person daily follow-up visits that include 12-lead ECG, and blood collections for serial cardiac biomarkers for high-sensitivity troponin.

Additional study patient postoperative assessment will be performed at 30 days and 1 year after surgery. These can be completed by interview and/or medical record review.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
72

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Illinois
      • Chicago, Illinois, United States, 60637
        • University of Chicago Medicine
    • Missouri
      • St Louis, Missouri, United States, 63110
        • Washington University School of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

50 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria

  1. Age >= 50 years
  2. Beta-blocker naïve [30 days prior to surgery]

  3. Previously diagnosed coronary artery disease (CAD), or

    1. History of peripheral vascular disease (PVD), or
    2. Chronic kidney disease (CKD) [eGFR ≤60ml/min], or
    3. History of positive stress test or
    4. At high risk for CAD (must meet at least 2 criteria):

    i. Age >= 70 years ii. Hypertension iii. Diabetes requiring oral medication or insulin iv. Current smoker or some days smoker within the past 2 years

  4. Major non-cardiac, elective surgery under general anesthesia

Exclusion Criteria

Subjects will not be enrolled if any of the following criteria exist:

  1. History of stroke, or transient ischemic attack (TIA)
  2. Previously diagnosed carotid disease, i.e., either 70% unilateral or 50% bilateral carotid occlusion.
  3. Heart rate <=55bpm
  4. Congestive heart failure with New York Heart Association(NYHA) Functional Classification of III-IV or left ventricular heart failure with ejection fraction ≤50%
  5. Severe valvular regurgitation
  6. Second or third degree atrioventricular (AV) block without pacemaker
  7. Active asthma or chronic obstructive pulmonary disease (COPD) with symptoms or resolving symptoms on day of surgery
  8. Anemia [HB<=9g/dL]
  9. Allergy to beta-blockade drugs
  10. Unwilling or unable to give consent for participation
  11. Undergoing any carotid endarterectomy, endovascular, endoscopic, superficial, or ambulatory procedures
  12. Pregnancy or lactating women
  13. Prisoners

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Metoprolol
Metoprolol group, 3-intravenous doses of 5mg metoprolol tartrate (over 15-minutes), and oral dose(s) of 25mg metoprolol approximately every 8 hours postoperatively for up to 3-days (or 72 hrs).
Drug: Metoprolol Tartrate
Patients will be randomly assigned to receive up-to-three intravenous doses of 5mg metoprolol tartrate (over 15-minutes) at the end of their surgical procedure, and a scheduled oral dose regimen of 25mg metoprolol approximately every 8-hours postoperatively for up to 3-days (or 72 hrs).
Other Names:
  • Beta-blocker
Placebo Comparator: Placebo
Placebo comparator group, up-to-three intravenous doses of placebo comparator (over 15-minutes), and oral dose(s) of a placebo comparator approximately every 8 hours postoperatively for up to 3-days (or 72 hrs).
Drug: Placebo
Patients will be randomly assigned to receive up-to-three intravenous doses of a placebo-comparator (over 15-minutes) at the end of their surgical procedure, and scheduled oral dose regimen of a placebo-comparator approximately every 8-hours postoperatively for up to 3-days (or 72 hrs).
Other Names:
  • Control
  • Sham
  • Placebo-comparator

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Effectiveness of Beta-blocker Therapy Reducing Post-operative Myocardial Injury
Time Frame: 0-3 days, following surgery

Measured effectiveness of post-operative beta-blocker therapy to reduce myocardial injury by monitoring daily biomarkers (High-Sensitivity cardiac Troponin [HS-cTn]).

Daily post-operative biomarker (hs-cTn) measurements to determine myocardial injury.

Myocardial injury is defined as a new hscTn elevation >99th percentile, or a 50% increase if the baseline hscTn is already elevated >99th percentile
0-3 days, following surgery

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Effectiveness in Reduction of Major Adverse Cardiac Events (MACE)
Time Frame: 0-3 days, following surgery
MACE are defined as myocardial ischemia (MI), cardiac death or coronary revascularization
0-3 days, following surgery
Monitor Post-operative Myocardial Ischemia
Time Frame: 0-3 days, following surgery

Post-operative cardiac monitoring via ECG to evaluate if myocardial ischemia is present.

Myocardial Ischemia is defined as ST depression or elevation of ≥0.2 mV in one lead or ≥0.1 mV in two contiguous leads lasting ≥10 min
0-3 days, following surgery
Number of Stroke Related Events Following Surgery
Time Frame: 0-3 days, following surgery
Stroke will be defined as focal or global cerebral, spinal, or retinal dysfunction of sudden onset
0-3 days, following surgery
Number of Participants Having Vasopressor Therapy to Regulate Symptomatic Hypotension
Time Frame: 0-3 days, following surgery

Monitor participants with vasopressor requirements for blood pressure regulation due to symptomatic hypotension (rate/duration time).

Symptomatic hypotension (systolic BP < 90 mmHg) can be determined by clinical intervention due to low blood pressure and/or patient developed clinical symptoms due to hypotension.
0-3 days, following surgery
Number of Participant Incidence of Clinically Relevant Bradycardia
Time Frame: 0-3 days, following surgery

Monitored participants with cumulative events of bradycardia (rate/duration time).

Bradycardia is defined as low heart rate (HR < 50/min).
0-3 days, following surgery
Participants Number of Days Spent Post-operative Hospitalization
Time Frame: 0-3 days following surgery
Measurement of participants number of days spent hospitalized (0-3 days) following surgery.
0-3 days following surgery
Patient Recovery Progress Events at 30-days Post-operative.
Time Frame: 30-days from surgery
Measured number of participant post-operative recovery events, 30-days following the surgical procedure.
30-days from surgery
Participant Post-operative Mortality at 1-year Following Surgery
Time Frame: 1-Year from surgery

Measured number of patient post-operative mortality at 1-year.

Measured by 'living', 'deceased', 'date of death'.
1-Year from surgery

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Measured Number of Patient Adverse Events
Time Frame: Post-operatively, 0-3 days, and day-30

Number of measured participant adverse events and severity associated with low blood pressure (hypotension), low heart heart (bradycardia), nausea and vomiting; or other symptoms determined 'probably', 'possibly', 'unrelated', or 'related' to the study intervention. This includes any unplanned escalation of care admissions (e.g., Intensive Care Unit [ICU]).

Study patient safety is monitored by the investigators (MD) with experience in critical care anesthesia, as well as an experienced clinical research team responsible for data collection and reporting of events.
Post-operatively, 0-3 days, and day-30

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Chicago

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Washington University School of Medicine
National Heart, Lung, and Blood Institute (NHLBI)

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Peter Nagele, MD, University of Chicago Medicine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
December 1, 2016

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 18, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 29, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 26, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 28, 2017

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
May 3, 2017

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 28, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 9, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • IRB19-1797
  • 5R01HL126892 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Heart Diseases

Clinical Trials on Metoprolol Tartrate

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings