A Comparative Study Between Different Surgical Techniques For Left Atrial Exclusion in Patients Undergoing...

Area of Science:

• Cardiovascular Surgery
• Cardiac Electrophysiology
• Thromboembolic Stroke Prevention

Background:

• Atrial fibrillation (AF) affects 10-65% of patients post-cardiac surgery.
• Left atrial appendage (LAA) is a primary source of cardioembolic stroke in AF patients.
• Oral anticoagulants are contraindicated in 30-50% of AF patients, necessitating alternative stroke prevention strategies like LAA obliteration.

Purpose of the Study:

• To determine the most effective surgical technique for left atrial appendage (LAA) obliteration.
• To compare the success rates and thromboembolic event reduction of different LAA occlusion methods in atrial fibrillation (AF) patients undergoing cardiac surgery.

Main Methods:

• A comparative study of 100 patients with AF undergoing concomitant cardiac surgery.
• Surgical LAA obliteration using excision, suture, patch, or stapler techniques.
• Postoperative transesophageal echocardiography (TEE) to assess LAA occlusion success and 2-year follow-up for stroke events.

Main Results:

• Surgical LAA excision demonstrated the highest occlusion success rate (87%) and zero stroke events post-surgery.
• Stapler exclusion had a 0% success rate, while suture and patch exclusion showed lower success rates (24% and 37.5%, respectively) with significant stroke rates.
• 42% of all patients achieved successful LAA closure across all techniques.

Conclusions:

• Surgical LAA excision is the most successful technique for LAA occlusion.
• LAA excision is a promising strategy for reducing thromboembolic events in AF patients undergoing cardiac surgery.