Real-time three-dimensional echocardiography of left atrial volume and function in patients with severe multi-vessel...

Area of Science:

• Cardiology
• Echocardiography
• Cardiac Function Assessment

Background:

• Coronary artery disease (CAD) significantly impacts cardiac function.
• Left atrial (LA) function plays a crucial role in overall cardiovascular health.
• Understanding early changes in LA function is vital for managing CAD progression.

Purpose of the Study:

• To evaluate alterations in left atrial (LA) volume and function using real-time three-dimensional echocardiography (RT-3DE).
• To assess these changes specifically in patients with severe multi-vessel coronary artery disease (CAD).

Main Methods:

• One hundred and eight subjects were stratified into severe multi-vessel CAD (n=48), severe single-vessel CAD (n=31), and control (n=29) groups based on coronary angiography.
• Real-time three-dimensional echocardiography (RT-3DE) was performed on all participants.
• Key LA parameters, including LA ejection fractions and LA function index (LAFI), were measured and calculated.

Main Results:

• Patients with severe multi-vessel CAD showed significantly reduced LA passive emptying fraction (LAVpEF) and LAFI compared to controls.
• LA presystolic volume (LAVpre) was notably higher in the multi-vessel CAD group.
• Receiver-operating characteristic (ROC) analysis identified LAVpEF as the most effective parameter for differentiating severe CAD, with an Area Under the Curve (AUC) of 0.864.

Conclusions:

• Conduit function, reflected by LAVpEF, indicates early LA functional changes in CAD.
• CAD severity correlates with the extent of damage to LA function.
• Compensatory increases in LA booster pump function may occur in severe multi-vessel CAD, with LAVpEF proposed as an optimal threshold for detection.