Clinical Outcome of Coronary Artery Bypass Graft Surgery Versus Percutaneous Coronary Intervention in Patients With Severe Left Ventricular Disfunction (CROWN) (CROWN)

September 10, 2026 updated by: Chiariello Giovanni A, Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Clinical Outcome of Coronary Artery Bypass Graft Surgery Versus Percutaneous Coronary Intervention in Patients With Severe Left Ventricular Disfunction: the CROWN Study.

The objective of this study is to evaluate the best treatment strategy in patients with critical coronary artery disease and severe left ventricular dysfunction.

In details, main goal of the study is to compare the clinical outcomes of patients with critical coronary artery disease and severe left ventricular dysfunction undergoing surgical coronary artery bypass grafting with those of patients treated by percutaneous coronary intervention.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

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.

Detailed Description

Despite CABG being increasingly performed in patients with reduced EF, the literature lacks of data directly comparing the clinical outcomes of surgical versus percutaneous revascularization in patients with left ventricular dysfunction.

The goal of this study is to compare the clinical outcomes of patients with critical coronary artery disease and severe left ventricular dysfunction undergoing surgical coronary artery bypass grafting with those of patients treated by percutaneous coronary intervention (PCI).

All patients affected by coronary artery disease who underwent surgical treatment (coronary artery bypass grafting, CABG) or percutaneous treatment (percutaneous coronary intervention, PCI) between January 2019 and December 2023, and who meet the inclusion and exclusion criteria, will be included in the study. Each patient will be enrolled following an interview and the subsequent signing of the informed consent form. Data will then be recorded in a dedicated database. In detail, the following information will be collected: anamnestic data, description of the performed procedure, preoperative and postoperative laboratory test results, preoperative, intraoperative, and postoperative echocardiographic parameters (including follow-up visits up to 2 years after the procedure), length of stay in the Intensive Care Unit and in the general ward, and data regarding any intraoperative and postoperative complications (death, shock, pericardial effusion, stroke, myocardial infarction, need for postoperative PCI, rehospitalization, heart failure). All data recorded in the database are routinely collected for all patients undergoing this type of intervention, and no additional examinations will be performed on patients included in the study.

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.
Observational

Enrollment (Estimated)

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.
300

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

  • Italy
      • Roma, Italy, 00168
        • Fondazione Policlinico Universitario A Gemelli IRCCS

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

All patients affected by coronary artery disease and severe left ventricular disfunction who underwent surgical treatment (coronary artery bypass grafting, CABG) or percutaneous treatment (percutaneous coronary intervention, PCI) between January 2019 and December 2023.

Description

Inclusion Criteria:

  • Age >= 18 years old;
  • Written informed consent;
  • Indication to CABG surgery (both "on-pump" and "off-pump") or to PCI;
  • Preoperative EF ≤35%.

Exclusion Criteria:

  • Inability to give written informed consent;
  • Emergency surgery;
  • Combined cardiac surgical procedures;
  • Previous cardiac surgery.

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

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
CABG
Patients with critical coronary artery disease and severe left ventricular disfunction treated with coronary artery bypass graft surgery
PCI
Patients with critical coronary artery disease and severe left ventricular disfunction treated with percutaneous coronary intervention

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
All-cause mortality
Time Frame: through study completion, an average of 1 year
Number of patients who died for any cause after CABG or PCI
through study completion, an average of 1 year

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
Mortality from cardiovascular causes
Time Frame: through study completion, an average of 1 year
Number of patients who died for cardiovascolar causes after CABG or PCI
through study completion, an average of 1 year
Acute myocardial infarction
Time Frame: through study completion, an average of 1 year
Number of patients who experienced myocardial infarction after CABG or PCI
through study completion, an average of 1 year
Rehospitalization from cardiovascular reasons
Time Frame: through study completion, an average of 1 year
Number of patients who needed rehospitalization after being discharged
through study completion, an average of 1 year
Repeated revascularization
Time Frame: through study completion, an average of 1 year
Number of patients who needed repeated revascularization after CABG or PCI
through study completion, an average of 1 year
Stroke
Time Frame: through study completion, an average of 1 year
Number of patients who had stroke after CABG or PCI
through study completion, an average of 1 year

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.
Fondazione Policlinico Universitario Agostino Gemelli IRCCS

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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.
August 1, 2025

Primary Completion (Estimated)

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.
December 31, 2026

Study Completion (Estimated)

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.
February 28, 2027

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).
September 5, 2026

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.
September 10, 2026

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.
September 14, 2026

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.
September 14, 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.
September 10, 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.
September 1, 2026

More Information

Terms related to this study

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.
  • ID7753

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

No

Studies a U.S. FDA-regulated device product

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.

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