USEFULNESS OF PLASMA BETA-ENDORPHIN LEVEL, PAIN THRESHOLD AND AUTONOMIC FUNCTION IN ASSESSING SILENT-MYOCARDIAL-ISCHEMIA IN PATIENTS WITH AND WITHOUT DIABETES-MELLITUS

被引:34
作者
HIKITA, H [1 ]
KURITA, A [1 ]
TAKASE, B [1 ]
NAGAYOSHI, H [1 ]
UEHATA, A [1 ]
NISHIOKA, T [1 ]
MITANI, H [1 ]
MIZUNO, K [1 ]
NAKAMURA, H [1 ]
机构
[1] NATL DEF MED COLL,DEPT INTERNAL MED 1,3-2 NAMIKI TOKOROZAWA,TOKOROZAWA,SAITAMA 359,JAPAN
关键词
D O I
10.1016/0002-9149(93)90149-7
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
The differences between diabetic and nondiabetic Patients with silent myocardial ischemia were investigated. Based on the results of previous exercise testing, a total of 110 patients (15 diabetic and 95 nondiabetic) with exercise-induced myocardial ischemia were divided into the following 3 groups: 15 diabetics with silent myocardial ischemia, 49 nondiabetics with silent myocardial ischemia, and 46 nondiabetics with anginal symptoms. All patients underwent treadmill exercise testing and 24-hour ambulatory electrocardiographic recording. Before and during exercise, blood samples from the antecubital vein were obtained to determine the beta-endorphin levels, and the pain threshold of each patient was measured with the electrical skin stimulation test. Furthermore, with regard to the ambulatory electrocardiographic recording, the mean of the SDs of all normal sinus RR intervals during successive 5-minute recording periods over 24 hours was analyzed and considered as an index of the autonomic function. The beta-endorphin level during exercise was significantly greater in nondiabetic patients with silent ischemia than in diabetic ones. The SD mean was significantly less in the diabetic group than in the 2 nondiabetic ones. The findings suggest that the role of beta endorphin in diabetic patients with silent myocardial ischemia may be less significant than in nondiabetic ones; therefore, a diabetic neuropathy that affects the autonomic pain fibers that innervate the heart may be involved in the mechanism of silent myocardial ischemia in diabetics.
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页码:140 / 143
页数:4
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