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用免疫组织化学LSAB法观察9例青壮年摔死综合征（SMDS）心传导系统组织及心肌细胞内血浆蛋白Al、Fn的改变，并以冠心病和非心脏病死亡者之心脏标本作对照。结果：SMDS组，8例Al阳性染色，7例Fn阳性染色；冠心病组，7例Al、Fn均呈阳性染色；非心脏病组心肌细胞内Al、Fn均呈阴性，而部分血管壁、结缔组织则呈阳性。提示部分SMDS病例有早期心肌缺血、心肌梗死的病理改变，其死亡原因应属心性猝死范畴。
Immunohistochemical LSAB method was used to observe the changes of plasma protein Al and Fn in 9 cases of cardiac arrest in young adult patients with heart failure (SMDS). Cardiac specimens of CHD and non-heart disease were used as controls. Results: In the SMDS group, 8 cases of Al positive staining and 7 cases of Fn positive staining; Coronary heart disease group, 7 cases of Al, Fn were positive staining; Al, Fn were negative in non-cardiac group myocardial cells, Connective tissue is positive. Some SMDS prompt cases of early myocardial ischemia, myocardial infarction pathological changes, the cause of death should be sudden cardiac death category.