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Figure 6 Incremental prognostic value of chronic atrial fibrillation (AF) in predicting cardiac death over clinical variables (*age, type of stress, resting heart rate, diabetes, and shortness of breath), nuclear variables (% myocardium hypoperfused at rest [% Myo fixed] and % myocardium ischemic [% Myo ischemic]), left ventricular ejection function ([LVEF] *including the interaction LVEF x shortness of breath). Added to all these most significant variables, AF provided additional significant gain in global chi-square, compared with the previous step.
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