Proceedings ArticleDOI
Signal analysis of rhythmical discharge in cardiac preganglionic fibers and of heart rate variability
Giuseppe Baselli,S. Cerutti,L.M. Finocchiaro,F Lombardi,A. Malliani,Nicola Montano +5 more
- pp 10-11
TLDR
In decerebrated and artificially ventilated cats the impulse activity of cardiac preganglionic fibers was recorded in a closed chest preparation together with ECG, arterial pressure, and respiration and the presence of low-frequency and high-frequency rhythms was demonstrated by parametric spectral and cross-spectral analyses.Abstract:
A signal processing technique is proposed for the extraction of short-term variability rhythms from the discharge of cardiac sympathetic fibers In decerebrated and artificially ventilated cats the impulse activity of cardiac preganglionic fibers was recorded in a closed chest preparation together with ECG, arterial pressure, and respiration The neural signal was fed into an analog spike counter, obtaining a stepwise count signal Beat-by-beat variability series were extracted; the spike-count signal is sampled once per cardiac cycle convolving with a FIR low-pass filter The presence of low-frequency and high-frequency rhythms was demonstrated by parametric spectral and cross-spectral analyses >read more
Citations
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Journal ArticleDOI
Spectral analysis of sympathetic discharge, R-R interval and systolic arterial pressure in decerebrate cats.
Nicola Montano,Federico Lombardi,Tomaso Gnecchi Ruscone,Mauro Contini,M. L. Finocchiaro,Giuseppe Baselli,Alberto Porta,Sergio Cerutti,Alberto Malliani +8 more
TL;DR: In 19 decerebrate and artificially ventilated cats, a significant and positive correlation was found between changes in impulse activity and the amplitude of LF component of either R-R interval or sympathetic discharge variabilities, supporting the hypothesis that the low-frequency component of R- R variability can be used as a marker of sympathetic modulation.
Journal ArticleDOI
Elimination von Atmungseffekten auf bewegungsinduzierte Änderungen der Herzrate - Elimination of Respiratory Effects on Movement-induced Cardiac Response
G. Florian,G. Pfurtscheller +1 more
TL;DR: In this article, the cardiac response induced by voluntary movement of the right and left index fingers was analysed as part of a comprehensive movement study, and the impact of synchronisation of movement and respiration on the induced cardiac response demonstrated.
Proceedings ArticleDOI
Linear and non-linear effects in the beat-by-beat variability of sympathetic discharge in decerebrate cats
Giuseppe B Aselli,Alberto Porta,Nicola Montano,Tomaso Gnecchi-Ruscone,Federico Lombardi,S. Cerutti +5 more
TL;DR: In this paper, heart rate variability and efferent sympathetic discharge were studied in decerebrate and artificially ventilated cats on a beat-by-beat basis, and the authors demonstrated the presence of nonlinear effects between the low frequency waves in sympathetic discharge and the high frequency pattern of ventilation.
References
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Journal ArticleDOI
Power spectrum analysis of heart rate fluctuation: a quantitative probe of beat-to-beat cardiovascular control
TL;DR: It is shown that sympathetic and parasympathetic nervous activity make frequency-specific contributions to the heart rate power spectrum, and that renin-angiotensin system activity strongly modulates the amplitude of the spectral peak located at 0.04 hertz.
Journal ArticleDOI
Power spectral analysis of heart rate and arterial pressure variabilities as a marker of sympatho-vagal interaction in man and conscious dog.
Massimo Pagani,Federico Lombardi,Stefano Guzzetti,Ornella Rimoldi,Raffaello Furlan,Paolo Pizzinelli,Giulia Sandrone,Gabriella Malfatto,Simonetta Dell’Orto,E Piccaluga +9 more
TL;DR: The spontaneous beat-to-beat oscillation in R-R interval during control recumbent position, 90° upright tilt, controlled respiration and acute and chronic β-adrenergic receptor blockade was analyzed, indicating that sympathetic nerves to the heart are instrumental in the genesis of low-frequency oscillations in R -R interval.
Journal Article
Assessment of autonomic function in human by heart rate spectral analysis
B. Pomeranz,Robert J.B. Macaulay,M. A. Caudill,I. Kutz,Dan Adam,Deborah M. Gordon,K. M. Kilborn,A. C. Barger,Daniel C. Shannon,Richard J. Cohen,Herbert Benson +10 more
TL;DR: In this paper, the authors assessed spontaneous heart rate fluctuations by use of autonomic blocking agents and changes in posture, and found that low-frequency fluctuations (below 0.12 Hz) in the supine position are mediated entirely by the parasympathetic nervous system.
Journal ArticleDOI
Assessment of autonomic function in humans by heart rate spectral analysis
B. Pomeranz,Robert J.B. Macaulay,M. A. Caudill,I. Kutz,Dan Adam,Deborah M. Gordon,K. M. Kilborn,A. C. Barger,Daniel C. Shannon,Richard J. Cohen +9 more
TL;DR: In this paper, the authors assessed spontaneous heart rate fluctuations by use of autonomic blocking agents and changes in posture, and found that low-frequency fluctuations (below 0.12 Hz) in the supine position are mediated entirely by the parasympathetic nervous system.
Journal ArticleDOI
Heart Rate Variability as an Index of Sympathovagal Interaction After Acute Myocardial Infarction
Federico Lombardi,Giulia Sandrone,Silvia Pernpruner,Roberto Sala,Mario Garimoldi,S. Cerutti,Giuseppe Baselli,Massimo Pagani,Alberto Malliani +8 more
TL;DR: Data indicate that the sympathetic predominance that is detectable 2 weeks after AMI is followed by recovery of vagal tone and a normalization of sympathovagal interaction, not only during resting conditions, but also in response to a sympathetic stimulus.