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Biomedical subjects

S X Chen

Publications and source records attributed to S X Chen.

52 records · Page 3Linked to original sources
PubMed1989

[Some parameters of blood-stasis, yin deficiency, and yang deficiency in patients with remote myocardial infarction].

This paper demonstrates some investigations on the differentiation of symptom-complex for old myocardial infarction patients (OMI). Among total 100 cases, 20 cases of blood-stasis type, 28 cases of Yin deficiency type and 52 cases of Yang deficiency type. Several laboratory investigations had been carried out for them. The results indicated the level of HDL-C was decreased, LDL-C was increased, ratio of HDL-C/TC was also decreased, platelet aggregation test (PAgT) was increased, factor VIII related antigen (VIII R: Ag) was elevated, among the above 3 types, especially in Yin deficiency group, showed statistically significant. In Yin deficiency group, the ACG tracing demonstrated late bulge type or in a plateau form, A/E-O greater than or equal to 15%. Yang deficiency group, SV, CO, CI were decreased, when compared with Yin deficiency all P value less than 0.01. Among 3 differentiation symptom-complex, microcirculation changes and degree of blood-stasis were in same appearance.

Adult↗
PubMed1989

Malignant pheochromocytoma: diagnosis and treatment in fifteen cases.

This study reviews the diagnosis and treatment of 15 patients with malignant pheochromocytoma (MP) between 1958 and 1986 in Shanghai Rui-jin Hospital. The main clinical features consisted of sustained elevation of arterial blood pressure, obviously increased catecholamine secretion and a sustained positive phentolamine test. Out of 15 patients only seven survived, two of whom suffered from paraplegia due to metastatic cordal compression. Compared with some earlier results, the prognosis was unsatisfactory. There were several factors which may have been responsible: (1) late diagnosis; (2) incomplete operation, and (3) no regular post-operative assessment of urinary biochemical changes. Because MP is a tumour with a low degree of malignancy, noting the above three factors and using 131I-MIBG to obtain accurate diagnosis and effective treatment enables a better prognosis of this disease.

Adolescent↗
PubMed1985

A new physiologic model for dynamic process of creatine kinase activity after acute myocardial infarction and estimation of infarct size.

A new physiologic model for dynamic process of Creatine Kinase (CK) after acute myocardial infarction is proposed. The fundamental hypotheses are tested. The new model is better than the log-normal model in goodness of fit. With this new model, the infarct size of complicated cases with double or multiple peak CK curve can be estimated as well as that of uncomplicated cases. To estimate parameters, a nomographic algorithm and a computer program have been designed. In most cases, the initial values for parameters estimated with Marquardt's method can be determined from individual CK data.

Creatine Kinase↗
PubMed1983

Species concept and taxonomic principles.

Based on the species concept of changing versus unchanging, the present work deals with the following two problems: First, why would the taxonomic system reflect evolutionary history? Second, how is this effected? Species are changing in the sense that each species has its own characteristics and there is no complete identity between any two species. On the other hand, species are unchanging and each one conserves a set of ancestral characters which allocates its taxonomic position, and this is the reason why the taxonomic system reflects evolutionary history. The taxonomic system is constructed to reflect evolutionary history mainly through the process of character analysis. Combining the viewpoints of cladistics and evolutionary systematics, the writer proposes six rules for character analysis which will provide the basis for analyzing evolutionary history.

Animals↗