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对16例临床诊断为心肌炎和扩张型心肌病患者的心内膜心肌活检标本分别用光镜、电镜和免疫荧光抗体技术进行了检查。光镜检查发现有炎性细胞浸润者9例,其中7例被电镜证实,同时伴有细胞变性或和坏死,据此诊断为活动性心肌炎。4例免疫荧光抗体阳性者均见于活动性心肌炎,发现这些病人心肌标本中的免疫活性物质为IgG和C_3。
Endocardial biopsy specimens from 16 patients with clinically diagnosed myocarditis and dilated cardiomyopathy were examined by light microscopy, electron microscopy and immunofluorescent antibody respectively. Light microscope examination revealed inflammatory cell infiltration in 9 cases, of which 7 cases were confirmed by electron microscopy, accompanied by cell degeneration or necrosis, whereby diagnosis of active myocarditis. Immunofluorescence antibody positive in 4 cases were found in active myocarditis, and found that the immunocompetent substances in the myocardial samples of these patients were IgG and C_3.