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Atrial fibrillation (AF) worsens outcome in patients with systolic heart failure and the presence of heart failure (HF) predicts a 5- to 6-fold increase in risk of AF. In addition to loss of atrial systole, AF may contribute to left ventricular (LV) systolic dysfunction due a rapid ventricular rate, irregularity of rhythm and exacerbation of mitral regurgitation due to atrial dilatation. Elimination...
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