Left atrial appendage occlusion: behind the bleeding risk

Area of Science:

• Cardiology
• Neurology
• Medical Devices

Background:

• Atrial fibrillation (AF) is a prevalent arrhythmia linked to a higher risk of embolic stroke.
• Oral anticoagulant therapy (OAT) is the primary strategy for preventing cerebral embolic events in AF patients.
• Non-valvular atrial fibrillation (NVAF) patients may experience ischemic strokes despite adequate OAT.

Purpose of the Study:

• To explore the role of Left Atrial Appendage Occlusion (LAAO) as a secondary prevention strategy for ischemic strokes in NVAF patients.
• To discuss the challenges and considerations for LAAO in patients with 'resistant strokes' despite OAT.

Main Methods:

• Review of clinical trials comparing LAAO and OAT for stroke prevention in NVAF.
• Analysis of physiopathological theories for stroke occurrence in NVAF patients on OAT.
• Evaluation of LAAO as a therapeutic option for secondary stroke prevention.

Main Results:

• LAAO has shown non-inferiority to OAT in preventing stroke in NVAF patients.
• The exact reasons for stroke occurrence in NVAF patients on OAT ('resistant strokes') are not fully understood.
• LAAO is a viable option requiring careful patient selection and planning.

Conclusions:

• LAAO is a demonstrated alternative to OAT for stroke prevention in NVAF.
• Further research is needed to elucidate the mechanisms of 'resistant strokes'.
• LAAO can be successfully performed in selected NVAF patients for stroke risk reduction.