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Effects of chronic epilepsy on heart rate variability A case-control study

Neural Regeneration Research 2010年第2期5卷 156-160页

作者： yueloong hsin Cheryl C H Yang Terry B J Kuo Tomor Harnod School of Medicine Tzu Chi University Department of Neurology Buddhist Tzu Chi General Hospital Institute of Brain Science National Yang Ming University Department of Neurosurgery Buddhist Tzu Chi General Hospital

BACKGROUND： Dysfunctional autonomic cardiac regulation is thought to be associated with high mortality in epileptic patients. OBJECTIVE： To explore changes in sympathetic and parasympathetic activities in epileptic patients with repetitive generalized tonic-clonic seizures by observing interictal heart rate. DESIGN, TIME AND SEI-I＇ING： A case-control study was performed at the Buddhist Tzu Chi General Hospital from July 2006 to May 2009. PARTICIPANTS： A total of 30 patients, comprising 15 males and 15 females, who presented with chronic epilepsy and repetitive generalized tonic-clonic seizures according to International League Against Epilepsy guidelines （ILAE, 1989）, were selected. In addition, 30 matched, healthy volunteers were selected as controls. METHODS： Lead I electrocardiogram was performed in the epilepsy and control groups for 5 minutes during a daytime interictal period. Frequency-domain analysis of heart rate variability was performed using fast Fourier transformation. MAIN OUTCOME MEASURES： Heart rate interval, high frequency （HF; 0.15-0.45 Hz） power, low frequency （LF; 0.04-0.15 Hz） power, and LF/（HF ＋ LF） expressed in normalized units （LF%）. RESULTS： Compared with the control group, the epilepsy group exhibited a significantly lower mean heart rate interval and HF power, but a significantly greater LF% （P〈 0.01）. There was no significant difference in LF power between the groups （P = 0.17）. CONCLUSION： Patients with chronic epilepsy exhibited faster heart rates during interictal periods, which could contribute to hiclher sympathetic and lower parasympathetic activities.

关键词： autonomic epilepsy heart rate parasympathetic sympathetic

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A MATHEMATICAL MODEL OF ENTERPRISE COMPETITIVE ABILITY AND PERFORMANCE THROUGH A PARTICULAR EMDEN-FOWLER EQUATION

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Acta Mathematica Scientia 2011年第5期31卷 1749-1764页

作者： Pai Jente Chang yueloong Chiu Sumiao Department of Land Economics National Chengchi University Department of Phychology National Chengchi University Department of Mathematical Sciences National Chengchi University

In this paper we work with the ordinary diffential equation u′′ u3 = 0 and obtain some interesting phenomena concerning blow-up, blow-up rate, life-spann, zeros and critical points of solutions to this equation.

关键词： estimate life-span blow-up blow-up rate performance competitive ability

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