The autonomic nervous system (ANS) is a branch of the nervous system that regulates
involuntary functions within the body, such as blood pressure control (the baroreceptor …

Heart rate variability (HRV) provides a noninvasive means of quantifying cardiac autonomic
activity. Imbalances in autonomic activity between the sympathetic and parasympathetic …

Heart rate variability (HRV) is an indicator of autonomic nervous system (ANS) activity. HRV
is the time series of fluctuations in the intervals between subsequent heartbeats. An …

Blood pressure control is vital for maintaining adequate perfusion of the brain and other
organs in the body across varying physiological demands, and the arterial baroreceptor …

Many methods have been proposed during the last two decades for the assessment of
autonomic nervous system function by quantification of the heart‐rate variation (HRV) …

The dynamical fluctuations in the rhythms of biological systems provide valuable information
about the underlying functioning of these systems. During the past few decades analysis of …

Heart rate variability (HRV) has now been investigated for a number of decades. Different
investigations linked HRV to the autonomic nervous system (ANS). Among these links, two …

The available epidemiological and clinical data implicate increased sympathetic nervous
system activity in increased cardiovascular morbidity and mortality and show that it has …

Heart rate variations reflect the output of the complex control of the heart mediated by the
autonomic nervous system. Because of that, they also encode different types of information …

Analysis of heart rate variability is a valuable method to investigate the sympathetic and
parasympathetic function of the autonomic nervous system. Although such analyses can …