Should patients undergoing cardiac surgery with atrial fibrillation have left atrial appendage exclusion?

Interactive Cardiovascular and Thoracic Surgery
Alan G DawsonJoel Dunning

Abstract

A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was 'Should patients undergoing cardiac surgery with atrial fibrillation (AF) have left atrial appendage (LAA) exclusion?' Altogether 310 papers were found using the reported search, of which 12 represented the best evidence to answer the clinical question. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. We conclude that despite finding five clinical trials including one randomised controlled trial, that studied around 1400 patients who underwent LAA occlusion, the results of these studies do not clearly show a benefit for appendage occlusion. Indeed of the five studies, only one showed a statistical benefit for LAA occlusion, with three giving neutral results and in fact one demonstrating a significantly increased risk. One reason for this may be the inability to achieve acceptably high rates of successful occlusion on echocardiography when attempting to perform this procedure. The highest success rate was only 93% but most studies reported only a 55-66% successful occlusion rate when attempting closure in a variety...Continue Reading

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