The left atrial appendage: An enigmatic friend or foe and implications of closure

Area of Science:

• Cardiology
• Vascular Surgery
• Medical Device Technology

Background:

• The left atrial appendage (LAA) is implicated in clot formation in atrial fibrillation (A-fib).
• Anticoagulation is standard for stroke prevention but carries bleeding risks.
• The LAA possesses unique anatomical functions beyond clot formation.

Purpose of the Study:

• To elucidate the functional roles of the LAA.
• To compare existing LAA closure techniques.
• To propose a novel approach for selecting patients for LAA closure based on comorbidities.

Main Methods:

• Comprehensive literature review of LAA anatomy and physiology.
• Comparative analysis of percutaneous endocardial, epicardial closure, and surgical clipping methods.
• Development of a comorbidity-based patient selection framework.

Main Results:

• The LAA has distinct anatomical features contributing to cardiac function.
• Various LAA closure methods offer alternatives to anticoagulation for stroke risk reduction.
• Physiological changes post-LAA closure warrant further investigation.

Conclusions:

• LAA closure is a viable strategy for thromboembolic event prevention in select atrial fibrillation patients.
• Personalized patient selection for LAA closure should consider comorbidities.
• Further research is needed to optimize LAA closure indications and understand post-procedural physiological effects.