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FIGURE 2. (A) Distribution of myocardial antimyosin uptake by the interval between the onset of symptoms and scintigraphy. The intensity of antimyosin uptake is presented as heart-to-lung uptake ratio, and the abnormal antimyosin result is defined by the dashed horizontal line at HLR > 1.58. A relatively higher HLR was observed in patients evaluated within 2 mo of illness (dashed vertical line). (B) Histologic findings from 22 patients who underwent endomyocardial biopsy, and comparison with intensity of antimyosin uptake and interval from onset of symptoms. The myocarditis is represented by 
and borderline myocarditis by 
; nondiagnostic biopsy is shown as 
. All patients with an HLR > 2 had histologic evidence of myocardial inflammation.
