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. 2013 Feb 28;7(2):e2078. doi: 10.1371/journal.pntd.0002078

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A – Left ventricular ejection fraction and QRS duration; B - Left ventricular ejection franction and QT corrected interval; and C: Diagnostic accuracy (area under the ROC curve) of QRS duration and QT corrected interval in the detection of reduced left ventricular ejection fraction.