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題 名 | Autonomic Cardiovascular Control: Lessons from Autonomic Disorders=自律神經血管系統在自律神經失衡之調節 |
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作 者 | 呂志成; 童吉士; | 書刊名 | Journal of Medical Sciences |
卷 期 | 23:5 2003.10[民92.10] |
頁 次 | 頁243-248 |
分類號 | 415.943 |
關鍵詞 | 自律神經血管系統; 自律神經失衡; Autonomic nervous system; Baroreflex; Hypertension; Shy-drager syndrome; |
語 文 | 英文(English) |
英文摘要 | Disorders of the autonomic nervous system may arise in afferent pathways, and in central nuclei involved in autonomic integration. Whereas these disorders are relatively rare medical conditions, they can be extremely useful in illustrating the regulatory role of the autonomic nervous system in cardiovascular function. Here we review defects in the afferent limb o the sympathetic nervous system (baroreflex failure), in central autonomic nuclei (multiple system atrophy) and in efferent pathways (pure autonomic failure). Hypertension is observed in each of these conditions, highlighting the role of the autonomic nervous system in long term regulation of blood pressure. Patients with autonomic failure are also characterized by the absence of baroreflex function. In these patients, responses normally obscured by autonomic reflexes are amplified. There are several examples of physiological phenomena first revealed in autonomic failure patients, e.g., food ingestion induces a profound decrease in blood pressure in these patients, due to splanchnic blood pooling. Conversely, commonly used medications such as phenylpropanolamine, and evenly seemingly innocuous interventions such as water drinking, can produce dramatic increases in blood pressure in these patients. Autonomic disorders, therefore, provide a unique opportunity to understand more common abnormalities in cardiovascular regulation. |
本系統中英文摘要資訊取自各篇刊載內容。