The role of parasympathetic nerve activity in the pathogenesis of coronary vasospasm.
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概要
- 論文の詳細を見る
To evaluate the role of the autonomic nervous system, especially the parasympathetic nervous system, in the initiation mechanism of vasospastic angina pectoris (AP), the coefficient of R-R interval variation (CV) on the electrocardiogram (ECG) and plasma catecholamine concentration were measured in 25 patients with vasospastic AP, 10 patients with effort AP and 12 control subjects. CV which has been recognized as reflecting parasympathetic nervous system activity was calculated from 100 consecutive heart beats on the ECG and represented as the percentage of standard deviation of the R-R interval per mean R-R interval. Repeated measurements of plasma catecholamine concentration revealed higher values at any sampling point throughout a day in patients with vasospastic AP than those in control subjects. A distinctly higher CV was observed at night in the vasospastic AP group. This elevated CV was abolished by atropine sulfate (1.5mg/day per os). Pilocarpine injection (1.3mg/10kg B.W. subcutaneously) induced a marked increase in CV that preceded the occurrence of chest pain and/or ischemic ECG changes in 5 patients with vasospastic AP. The increment in CV at 10 min after pilocarpine administration was greater in vasospastic AP than in control subjects (p<0.05). It is concluded that enhanced parasympathetic activity may play a role in the initiation of coronary vasospasm associated with sympathetic hyperactivity.
- International Heart Journal刊行会の論文
著者
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Ito Yoshihisa
Department Of Internal Medicine First Division School Of Medicine Kobe University
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SUEMATSU Masakuni
Department of Internal Medicine, Division I, Kobe University School of Medicine
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FUKUZAKI Hisashi
Department of Cardiology, Himeji Cardiovascular Center
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