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Complexity of autonomic regulation affects the systemic vascular, but little is known about its influence on cerebrovascular regulation. In this study, we examine the complexity of neuromodulation by frequency and nonlinear heart rate variability (HRV) to cerebral reserve function during cerebrovascular reactivity (CVR) by breath holding induced - hypercapnia and subsequently, cerebral vasodilatation...
Therapeutic hypothermia is recommended as a cardiac arrest treatment for neuroprotection. In this study, we aimed to explore nonlinear heart rate variability (HRV) with other domains to clearify and setting up the significant index for survival. All patients were divided into two groups by 7 days survival outcome (n = 9 vs. 9). The limb lead II ECG signals are collected (10 minutes, sampling rate:...
Nitric oxide (NO) is a key oxidative stress marker. Real time NO measurement in pA/nM by electrochemistry is the powerful tool explores pathophysiological process of many disease including stroke subtypes, especially, lacunar stroke. In this study, we investigate the performance of classification models by hybrid nonlinear kernel function of NO obtained from healthy control and lacunar stroke. The...
Introduction: Atrial fibrillation (AF) is the most common cardiac arrhythmia associated with an increased risk of left atrial thrombosis as well as ischemic stroke. In this study, we have evaluated the characteristics of paroxysmal AF (PAF) and persistent AF using sample entropy (SampEn), a new biosignal parameter for determining degree of AF signal complexity in atrial activities extracted from surface...
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