Background The heart is the central organ of the circulatory system, which maintains the flow
of blood along with the transport of nutrients to different cells and tissues. A well-functioning …

Long-term endurance training significantly influences how the autonomic nervous system
controls heart function. Endurance training increases parasympathetic activity and …

Scale-free dynamics, with a power spectrum following P∝ f− β, are an intrinsic feature of
many complex processes in nature. In neural systems, scale-free activity is often neglected …

Neurophysiological field-potential signals consist of both arrhythmic and rhythmic patterns
indicative of the fractal and oscillatory dynamics arising from likely distinct mechanisms …

The last two decades have witnessed the recognition of a significant relationship between
the autonomic nervous system and cardiovascular mortality, including sudden cardiac …

Background The clinical relevance of HRV was first appreciated in 1965 when Hon and Lee
6 noted that fetal distress was preceded by alterations in interbeat intervals before any …

Dielectrics in Electric Fields explores the influence of electric fields on dielectric—ie, non-
conducting or insulating—materials, examining the distinctive behaviors of these materials …

This review first gives an overview on the concept of fractal geometry with definitions and
explanations of the most fundamental properties of fractal structures and processes like self …

I n 1981, Akselrod et al'examined the frequency components of heart rate variability (HRV) in
dogs at physiologic rest, and under parasympathetic and total autonomic blockade. That …

Background—Preliminary data suggest that the analysis of RR interval variability by fractal
analysis methods may provide clinically useful information on patients with heart failure. The …