Heart rate variability (HRV), the beat-to-beat variation in either heart rate or the duration of
the R–R interval–the heart period, has become a popular clinical and investigational tool …

Electrocardiographic RR intervals fluctuate cyclically, modulated by ventilation, baroreflexes,
and other genetic and environmental factors that are mediated through the autonomic …

The heart-rate dynamics are one of the most analyzed physiological interactions. Many
mathematical methods were proposed to evaluate heart-rate variability. These methods …

Methods from nonlinear dynamics (NLD) have shown new insights into heart rate (HR)
variability changes under various physiological and pathological conditions, providing …

Indices of heart rate variability (HRV) provide a window onto autonomic modulation of the
heart. HRV indices, determined in either the time or frequency domain, are closely related …

Objectives: This study sought to determine whether combined assessment of autonomic
tone plus cardiac electrical substrate identifies most patients at risk of serious events after …

This cutting-edge reference examines how beat-to-beat variations in heart rate and blood
pressure provide a window into the health of the autonomic nervous system. The book …

The main intention of this contribution is to discuss different nonlinear approaches to heart
rate and blood pressure variability analysis for a better understanding of the cardiovascular …

Background—Trigger mechanisms for the onset of paroxysmal atrial fibrillation (AF) in
patients without structural heart disease are not well established. New analysis methods of …

Objective: To investigate cardiac autonomic dysfunction in patients with major depressive
disorder (MDD). Research in this area has faced several limitations because of the …