Assessment of left atrial appendage function by echocardiography

Area of Science:

• Cardiology
• Cardiac Physiology
• Medical Imaging

Background:

• The left atrial appendage (LAA) is a primary site for thrombus formation.
• LAA function is integral to normal cardiac performance.
• Thrombus in the LAA can lead to thromboembolism.

Purpose of the Study:

• To review clinical and echocardiographic correlates of LAA function.
• To highlight the significance of LAA flow velocity as a surrogate for LAA function.
• To guide the interpretation of LAA functional patterns in specific clinical settings.

Main Methods:

• Transesophageal echocardiography (TEE) is a primary imaging modality.
• LAA flow velocity measurements are used to assess LAA function.
• Alternative techniques like tissue Doppler imaging are also considered.

Main Results:

• LAA flow velocity is influenced by age, hemodynamics, arrhythmias, and treatments.
• Understanding LAA function is key to developing strategies against atrial thrombosis.
• Interpreting LAA functional patterns aids in clinical decision-making.

Conclusions:

• LAA function assessment is vital for managing atrial thrombosis risk.
• Echocardiographic parameters, particularly LAA flow velocity, provide valuable functional insights.
• This review synthesizes current knowledge on LAA function and its clinical implications.