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Figure 1 The correlation between left ventricular ejection fraction and the severity of myocardial damage detected by antimyosin antibody heart-to-lung uptake ratio in those 36 patients in whom reliable measures of ejection fraction by echocardiography were obtained. The area below the horizontal line represents normal range of antimyosin antibody heart-to-lung uptake ratio (<1.55). LV = left ventricular.