Hellenic J Cardiol 48: 278-289, 2007 logical and pathological conditions, such as heart
failure, diabetes, hypertension, sepsis and brain death. 2-9 The first recorded measurements …

THE RHYTHM OF THE HEART has not only fascinated cardiologists but also inspired poets
and musicians. Indeed, the periodic beat of the heart was used to define the speed of music …

Altered heart rate variability (HRV) and heart rate dynamics have prognostic significance for
the progression of several cardiac diseases (eg coronary artery diseases) and mortality (eg …

The assessment of heart rate and blood pressure variability is increasingly used to evaluate
the dynamic features of cardiovascular control mechanisms. Both experimental and clinical …

Power spectral analysis of heart period (RR) and arterial pressure short-term variability
reveals the existence of two rhythmic oscillations: a high frequency (HF) component …

In the last decades analysis of heart rate variability has emerged as a new useful tool for
assessing the changes in autonomic tone that influences cardiovascular function. High …

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 …

Neural regulation of circulatory functions is mainly effected through the interplay of the
sympathetic and vagal outflows, which are tonically and phasically modulated by the …

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 …

The autonomic nervous system plays an important role in a wide range of visceral-somatic
and mental diseases. Cardiac parameters, particularly heart rate as a physiological …