The hypothesis being studied is that add-on arrhythmia surgery in patients with atrial fibrillation (AF) undergoing valvular or coronary surgery improves quality of life, is cost-effective, reduces perioperative and long-term morbidity associated with AF.
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Percentage of patients free from atrial fibrillation, as apparent from 24 hour Holter registration, in addition to standard ECG. For the purpose of this primary endpoint, AF was defined as lasting longer than 10 seconds.
Timeframe: between 3 months and 12 months post-operative