硝酸镧示踪犬晕厥心肌膜性结构的完整性

Colloidal lanthanum nitrate as a marker forintactness of membra-nous structure in canine stunned myocardium

作者用硝酸镧作为超微结构探针，对犬晕厥心肌和梗塞心肌的细胞膜性结构通透性进行对比研究．结果表明：晕厥心肌可见线粒体肿胀和空泡形成，细胞内仅有少量镧颗粒沉着，细胞膜、线粒体膜、溶酶体膜等膜性结构完整．梗塞心肌可见大量镧颗粒通过破损的胞膜沉积于胞浆和线粒体内．说明晕厥心肌发生过程中膜性结构仍保持其完整性．

A contrastive study was performed of the permeability of cell membranous structures in canine stunned myocardium and infarct myocadium using colloidal lanthanum nitrate as an ultrastructure probe.Stunned myocardium was characterized by mitochondrial swelling,vacuolar formation,a very small amount of lanthanum granule deposit inside cells and intact structure of such membranes as cell membrane,mito- chondrial membrane and lysosome membrane. Infarct myocardium was characterized by large number of lan-thanum granules passing through ruptured cell membrane and deposited in cytoplasm and mitochondria.These results suggested that during the occurrence of stunned myocardium membranous structure had main-tained intactness.