Percutaneous Left Atrial Appendage Closure: Rational, Patient Selection, and Preoperative Evaluation
Atrial fibrillation (AF) is the most common arrhythmia, affecting 1–2 % of worldwide population, the incidence is 0.05 % cases per year, and it is expected to more than double by 2050 in the western countries . AF presence increases the risk of embolic stroke by four- to fivefold  and results in stroke incidence of 2–5 % per year in untreated patients . Such disabling complication is mainly related to thrombus formation within the left atrial appendage (LAA) . Furthermore, among patients with AF and history of stroke, the rate of new embolic events may increase up to 12 % per year if patients are not on oral anticoagulants and is at 3 % per year in patients who are properly under medical treatment .
KeywordsOral Anticoagulation Left Atrial Appendage CHADS2 Score Left Atrial Appendage Thrombus Left Atrial Appendage Occlusion
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