Assessment of spatial organization in the atria during paroxysmal atrial fibrillation and adrenergic stimulation
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Valentina D.A. Corino
Abstract
Non-linear parameters were computed to assess the extent of spatial organization in the atria in terms of coupling/synchronization between electrograms recorded in different atrial sites. Recordings of 9 patients suffering from paroxysmal atrial fibrillation were tested during four clinical experimental conditions: sinus rhythm and atrial fibrillation, both before and after isoproterenol infusion, a drug mimicking adrenergic activation. Two non-linear metrics were investigated: an index of non-linear association (NLA) and a synchronization (S) index based on the cross-conditional entropy. Results evidence the presence of reduced coupling after drug infusion in both sinus rhythm and atrial fibrillation. Moreover, passing from the NLA to the S index, the capability of the parameter to capture the subtle changes due to isoproterenol administration increased.
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©2006 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
- ESGCO 2006 Conference and Meeting of the European Study Group on Cardiovascular Oscillations, Jena, Germany, May 15–17, 2006
- Cardiovascular Oscillations: from methods and models to clinical applications
- Circadian and ultradian rhythms in heart rate variability
- Influence of age, body mass index, and blood pressure on the carotid intima-media thickness in normotensive and hypertensive patients
- Multivariate and multidimensional analysis of cardiovascular oscillations in patients with heart failure
- Multivariate and multiorgan analysis of cardiorespiratory variability signals: the CAP sleep case
- Role of the autonomic nervous system in generating non-linear dynamics in short-term heart period variability
- Non-linear dynamic analysis of the cardiac rhythm during transient myocardial ischemia
- Complex autonomic dysfunction in cardiovascular, intensive care, and schizophrenic patients assessed by autonomic information flow
- Low HRV entropy is strongly associated with myocardial infarction
- Revisiting the potential of time-domain indexes in short-term HRV analysis
- Fractal dimension in health and heart failure
- Spatiotemporal correlation analyses: a new procedure for standardisation of DC magnetocardiograms
- Changes in heart rate variability of athletes during a training camp
- The missing link between cardiovascular rhythm control and myocardial cell modeling
- Model of the sino-atrial and atrio-ventricular nodes of the conduction system of the human heart
- Modelling long-term heart rate variability: an ARFIMA approach
- Clinical correlates of non-linear indices of heart rate variability in chronic heart failure patients
- Recurrence analysis of nocturnal heart rate in sleep apnea patients
- Normalized correlation dimension for heart rate variability analysis
- Complexity of heart rate fluctuations in near-term sheep and human fetuses during sleep
- Differences between heart rate and blood pressure variability in schizophrenia
- Influence of sympathetic vascular regulation on heart-rate scaling structure: spinal cord lesion as a model of progressively impaired autonomic control
- Increase in regularity of fetal heart rate variability with age
- Fetal heart rate variability in growth restricted fetuses
- Frequency modulation between low- and high-frequency components of the heart rate variability spectrum
- Mixed predictability and cross-validation to assess non-linear Granger causality in short cardiovascular variability series
- Assessment of spatial organization in the atria during paroxysmal atrial fibrillation and adrenergic stimulation
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