• Corpus ID: 39357024

in focus Heart rate variability

  title={in focus Heart rate variability},
  author={Harald M Stauss},
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. In music notation, the traditional Italian term “moderato” originally referred to one beat of the measure per walking pace (76–80 paces/min) or heartbeat ( 72 beats/min). The use of the heartbeat to define the speed of music may imply that the periodicity of the beat of the heart is very constant. However, this is not… 
Peculiarities of regulation of high-frequency oscillations of cardiac rhythm in rat ontogenesis
In adult rats, the peripheral mechanism of the RA formation is preserved, as disturbance of parasympathetic innervation leads not to the disappearance of RA, but only to a decrease of its amplitude.


Wavelet analysis of instantaneous heart rate: a study of autonomic control during thrombolysis.
Time-dependent spectral analysis of HRV using the wavelet transform was found to be valuable for explaining the patterns of cardiac rate control during reperfusion, and patterns ofHRV compatible with relative sympathetic enhancement were found in six AW-MI patients.
Functional restitution of cardiac control in heart transplant patients.
The results indicate a biphasic evolution in cardiac control mechanisms from lack of control to a first-order control loop followed by partial sympathetic reinnervation and, finally, the direct effect of the old sinoatrial node on the pacemaker cell of the new sino atrial node.
Neural influences on cardiovascular variability: possibilities and pitfalls.
  • S. Malpas
  • Biology
    American journal of physiology. Heart and circulatory physiology
  • 2002
A new hypothesis is proposed to account for the slow oscillation in heart rate and blood pressure that incorporates components of the central nervous system, other reflex pathways regulating sympathetic activity, and resonance in the baroreflex control of blood pressure.
Interbeat interval variability in isolated working rat hearts at various dynamic conditions and temperatures
It is concluded that effective mutual synchronization with minimal fluctuation happens within the sino-atrial node of intact rat hearts at body temperature, and synchronization is not affected even by extreme changes in pre- and afterload.
Progression of heart failure after myocardial infarction in the rat.
The findings demonstrate that the early course of heart failure is characterized not by a simple "switching on" of neurohumoral drive, but rather by dynamic fluctuations in Neurohumoral regulation that are linked to the process of left ventricular remodeling.
Heart rate control and mechanical cardiopulmonary coupling to assess central volume: a systems analysis.
It is suggested that short-term cardiovascular control is optimized at mild hypervolemia and multivariate techniques can quantify the relations between a variety of respiratory and hemodynamic parameters, allowing for the in vivo assessment of complex cardiorespiratory interactions during manipulations of central volume.
Frequency characteristics of long-term heart rate variability during constant-routine protocol.
A constant-routine protocol that included simultaneous core body temperature correction and coarse-graining spectral analysis showed that below a frequency of approximately 10(-3.5) Hz (a period >1 h), HRV is strongly influenced by behavioral factors; above that crossover frequency,HRV is behavior independent, possibly reflecting an intrinsic regulatory system.
Differential sympathetic nerve and heart rate spectral effects of nonhypotensive lower body negative pressure.
HR variability has limited utility as an estimate of the magnitude of orthostatic changes in sympathetic discharge to muscle and is refutes the concept that low levels of LBNP interrogate, selectively, cardiopulmonary reflexes.
Function of human intrinsic cardiac neurons in situ.
It is concluded that human intrinsic cardiac neurons generate spontaneous activity and that many receive inputs from ventricular mechanosensory neurites, and that cardiopulmonary bypass and cardioplegia do not induce residual depression of their function.