Detection of atrial electromechanical dysfunction in obesity

Area of Science:

• Cardiology
• Electrophysiology
• Obesity Medicine

Background:

• Obesity is an independent risk factor for atrial fibrillation.
• Understanding the link between body mass index and atrial function is crucial for risk stratification.

Purpose of the Study:

• To investigate the association between body mass index (BMI) and atrial electromechanical intervals in obese versus non-obese patients.
• To evaluate left atrial (LA) mechanical functions in relation to BMI.

Main Methods:

• Seventy patients were categorized into obese (BMI ≥ 30) and non-obese (BMI < 30) groups.
• Transthoracic echocardiography was used to assess LA volumes and mechanical function (emptying volumes and fractions).
• Atrial electromechanical coupling (PA) and delays were measured using tissue Doppler imaging (TDI).

Main Results:

• Obese patients exhibited significantly higher LA diameter and interatrial electromechanical delay.
• Impaired LA passive emptying volume/fraction and increased LA active emptying volume/fraction were observed in obese individuals.
• A positive correlation was found between interatrial electromechanical delay and BMI.

Conclusions:

• Delayed atrial electromechanical intervals and impaired LA mechanical function are associated with higher BMI.
• These electrophysiological and functional changes may represent subclinical atrial dysfunction in obese patients.
• Early detection of these abnormalities could aid in managing arrhythmias in the obese population.