Impact of Visceral Adiposity on Postoperative Atrial Fibrillation After CABG

March 8, 2026 updated by: ÖZGE PEKŞEN KIZILIŞIK, Kartal Kosuyolu Yuksek Ihtisas Education and Research Hospital

Impact of Visceral Adiposity on Postoperative Atrial Fibrillation After Coronary Artery Bypass Grafting (CABG): A Prospective Observational Study

Obesity has become a major public health problem in both developed and developing countries, with a continuous increase particularly since the 1980s. Moreover, it is a well-established metabolic risk factor for diabetes mellitus, hypertension, and various types of cancer, as well as cardiovascular diseases such as heart failure and coronary artery disease. Body mass index (BMI) is calculated by dividing body weight in kilograms by the square of height in meters and is widely used as an indicator of obesity. However, BMI does not quantitatively reflect body fat distribution and fails to account for components such as skeletal muscle and bone mass. Therefore, interest in assessing body fat distribution has increased, and in recent years, studies evaluating the correlation between anthropometric, biochemical, and anatomical measurements and clinical outcomes have become more frequent. In particular, it is acknowledged that abdominal obesity cannot be accurately represented by BMI alone and is primarily associated with visceral adipose tissue (VAT). The aim of this study is to evaluate the association between preoperative visceral and subcutaneous adipose tissue measurements (VAT and SAT), assessed by ultrasonography in patients scheduled for open-heart surgery, and the development of postoperative atrial fibrillation.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Estimated)

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 Contact

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

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Adult patients (≥18 years) scheduled for coronary artery bypass graft surgery.

Description

Inclusion Criteria:

  • Elective isolated coronary artery bypass graft surgery (on-pump)
  • Age ≥18 years, planned prospectively in 300 patients

Exclusion Criteria:

  • Patients requiring urgent or emergency surgery
  • Off-pump coronary artery bypass graft surgery
  • Surgeries other than isolated coronary artery bypass graft
  • Patients in whom abdominal ultrasound measurement cannot be performed (e.g., due to severe deformity, wounds, edema)
  • Active malignancy
  • eGFR <30 mL/min
  • Advanced-stage chronic obstructive pulmonary disease (COPD)
  • Preoperative atrial fibrillation or atrial flutter
  • Patients who do not provide written informed consent for the study

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
Intervention / Treatment
Group 1: Postoperative AF Group
Visceral and subcutaneous adipose tissue thickness in patients who develop postoperative atrial fibrillation after coronary artery bypass graft surgery.
Other: Postoperative AF Group
In patients undergoing coronary artery bypass graft surgery, ultrasound-guided measurements of visceral and subcutaneous adipose tissue will be performed preoperatively. The relationship between adipose tissue thickness and the development of postoperative atrial fibrillation will be evaluated by comparing patients who develop AF with those who do not.
Group 2: Non-AF Group
Visceral and subcutaneous adipose tissue thickness in patients who do not develop postoperative atrial fibrillation after coronary artery bypass graft surgery.
Other: Non-AF Group
In patients undergoing coronary artery bypass graft surgery, ultrasound-guided measurements of visceral and subcutaneous adipose tissue will be performed preoperatively. The relationship between adipose tissue thickness and the development of postoperative atrial fibrillation will be evaluated by comparing patients who develop AF with those who do not.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Effect of visceral adipose tissue thickness on postoperative atrial fibrillation
Time Frame: Within 7 days after coronary artery bypass graft surgery or until hospital discharge
Preoperative ultrasound-guided measurement of visceral adipose tissue thickness will be performed. The association between visceral fat thickness and the development of postoperative atrial fibrillation will be evaluated.
Within 7 days after coronary artery bypass graft surgery or until hospital discharge

Collaborators and Investigators

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

Sponsor

Kartal Kosuyolu Yuksek Ihtisas Education and Research Hospital

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 (Estimated)

April 1, 2026

Primary Completion (Estimated)

December 22, 2026

Study Completion (Estimated)

January 22, 2027

Study Registration Dates

First Submitted

March 8, 2026

First Submitted That Met QC Criteria

March 8, 2026

First Posted (Actual)

March 12, 2026

Study Record Updates

Last Update Posted (Actual)

March 12, 2026

Last Update Submitted That Met QC Criteria

March 8, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2025/23/1318

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

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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