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  1. Medical and Biological Engineering and Computing
  2. Medical and Biological Engineering and Computing : Volume 36
  3. Medical and Biological Engineering and Computing : Volume 36, Issue 1, January 1998
  4. Quantifying electrocardiogram RT-RR variability interactions
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Medical and Biological Engineering and Computing : Volume 55
Medical and Biological Engineering and Computing : Volume 54
Medical and Biological Engineering and Computing : Volume 53
Medical and Biological Engineering and Computing : Volume 52
Medical and Biological Engineering and Computing : Volume 51
Medical and Biological Engineering and Computing : Volume 50
Medical and Biological Engineering and Computing : Volume 49
Medical and Biological Engineering and Computing : Volume 48
Medical and Biological Engineering and Computing : Volume 47
Medical and Biological Engineering and Computing : Volume 46
Medical and Biological Engineering and Computing : Volume 45
Medical and Biological Engineering and Computing : Volume 44
Medical and Biological Engineering and Computing : Volume 43
Medical and Biological Engineering and Computing : Volume 42
Medical and Biological Engineering and Computing : Volume 41
Medical and Biological Engineering and Computing : Volume 40
Medical and Biological Engineering and Computing : Volume 39
Medical and Biological Engineering and Computing : Volume 38
Medical and Biological Engineering and Computing : Volume 37
Medical and Biological Engineering and Computing : Volume 36
Medical and Biological Engineering and Computing : Volume 36, Issue 6, November 1998
Medical and Biological Engineering and Computing : Volume 36, Issue 5, September 1998
Medical and Biological Engineering and Computing : Volume 36, Issue 4, July 1998
Medical and Biological Engineering and Computing : Volume 36, Issue 3, May 1998
Medical and Biological Engineering and Computing : Volume 36, Issue 2, March 1998
Medical and Biological Engineering and Computing : Volume 36, Issue 1, January 1998
Editorial: Cellular engineering and the future
Gastric emptying of solids measured by means of magnetised iron oxide powder
Computer simulation of the impact of different dimensions of the stomach on the validity of electrogastrograms
Linear servo-controlled pressure generator for forced oscillation measurements
Hot-wire anemometer for spirography
Cardiokymograph system with a capacitance transducer and its preliminary application in the measurement of heart wall movement
Quantifying electrocardiogram RT-RR variability interactions
Performance assessment of standard algorithms for dynamic R-T interval measurement: comparison between R-T$_{apex}$ and R-T$_{end}$ approach
Continuous arterio-venous haemodiafiltration: hydraulic and diffusive permeability index of an AN-69 capillary haemofilter
Ultrasonic determination of the elastic modulus of human cortical bone
Ultrasonic characterisation in determining elastic modulus of trabecular bone material
CT analysis of the use of the electrical impedance technique to estimate local oedema in the extremities in patients with lymphatic obstruction
Transverse tripolar stimulation of peripheral nerve: a modelling study of spatial selectivity
Robust supervised classification of motor unit action potentials
New method for the analysis of multiple positron emission tomography dynamic datasets: an example applied to the estimation of the cerebral metabolic rate of oxygen
Biological effects of static magnetic fields on the microcirculatory blood flowin vivo: a preliminary report
Comparative quantification of gastric electrical activity and electrogastrograms
Dynamic model of airway pressure drop
Fast 3D registration of MR brain images using the projection correlation registration algorithm
Estimation of myocardial glucose utilisation with PET using the left ventricular time-activity curve as a non-invasive input function
Exercise tricycle for paraplegics
Effect of flow direction on the morphological responses of cultured bovine aortic endothelial cells
Investigation into the tensile properties of collagen/chondroitin-6-sulphate gels: the effect of crosslinking agents and diamines
Microstamp patterns of biomolecules for high-resolution neuronal networks
Medical and Biological Engineering and Computing : Volume 35

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Quantifying electrocardiogram RT-RR variability interactions

Content Provider SpringerLink
Author Porta, A. Baselli, G. Caiani, E. Malliani, A. Lombardi, F. Cerutti, S.
Copyright Year 1998
Abstract A dynamic linear parametric model is designed to quantify the dependence of ventricular repolarisation duration variability on heart period changes and other immeasurable factors. The model analyses the beat-to-beat series of the RR duration and of the interval between R- and T-wave apexes (RT period). Directly from these two signals, a parametric identification procedure and spectral decomposition techniques allow RT variability to be divided into RR-related and RR-unrelated parts and allow the RT-RR transfer function to be calculated. RT variability is driven by RR changes at low frequency (LF, around 0.1 Hz) and high frequency (HF, at the respiratory rate), whereas, at very low frequencies, the RR-unrelated contribution to the total RT variability is remarkable. During tilt at LF the RR-related RT percentage power increases (p<0.02), the RR-unrelated RT percentage power remains unchanged, the gain of the RT-RR relationship largely increases (p<0.001), and the phase is not significantly modified. Both the RR-related and the RR-unrelated RT percentage powers at LF are not affected by controlled respiration, and an increase in the RT-RR gain at HF is observed (p<0.02). The proposed analysis may help to describe the regulation of the ventricular repolarisation process and to extract indexes quantifying the coupling between heart period and ventricular repolarisation interval changes.
Starting Page 27
Ending Page 34
Page Count 8
File Format PDF
ISSN 01400118
Journal Medical and Biological Engineering and Computing
Volume Number 36
Issue Number 1
e-ISSN 17410444
Language English
Publisher Kluwer Academic Publishers
Publisher Date 1998-01-01
Publisher Place Dordrecht
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword RT variability RR variability RT-RR interaction model RT-RR transfer function Parametric identification Spectral decomposition Human Physiology Neurosciences Imaging Radiology Computer Applications Biomedical Engineering
Content Type Text
Resource Type Article
Subject Biomedical Engineering Computer Science Applications
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