Left atrial catheter ablation and ischemic stroke.

Area of Science:

• Cardiovascular Medicine
• Neurology
• Medical Technology

Background:

• Left atrial catheter ablation (LACA) is a standard treatment for drug-refractory atrial fibrillation (AF).
• LACA aims to restore sinus rhythm, potentially preventing AF-related strokes, though randomized trial evidence is lacking.
• Existing data suggest LACA patients often have low baseline stroke risk, contrasting with the procedure's inherent risk.

Purpose of the Study:

• To review current knowledge on LACA and its association with procedure-related ischemic stroke.
• To highlight uncertainties regarding LACA's impact on stroke risk and cognitive function.
• To emphasize the need for further research into stroke risk factors and anticoagulation strategies post-LACA.

Main Methods:

• Review of existing literature on left atrial catheter ablation and ischemic stroke.
• Analysis of stroke risk associated with LACA procedures.
• Discussion of cerebral microemboli, MRI-detected lesions, and cognitive dysfunction following LACA.

Main Results:

• LACA carries a procedure-related ischemic stroke risk of approximately 0.5% to 1%.
• Cerebral microemboli and MRI-detectable ischemic lesions are potential consequences of LACA, linked to cognitive deficits.
• Recurrent AF post-LACA can lead to strokes, particularly if anticoagulation is stopped.

Conclusions:

• While LACA treats AF, it introduces a significant procedural stroke risk.
• LACA-induced cerebral lesions may contribute to cognitive impairment.
• Prospective trials are essential to identify stroke risk factors and optimize post-LACA anticoagulation.