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Modulus maxima derived from the continuous wavelet transform offers an enhanced time-frequency analysis technique for ECG signal analysis. Features within the ECG can be shown to correspond to various morphologies in the Continuous Modulus Maxima domain. This domain has an easy interpretation and offers a good tool for the automatic characterization of the(More)
Human immunodeficiency virus-1 (HIV-1) infection disrupts the intestinal immune system, leading to microbial translocation and systemic immune activation. We investigated the impact of HIV-1 infection on the intestinal microbiome and its association with mucosal T-cell and dendritic cell (DC) frequency and activation, as well as with levels of systemic(More)
HIV-1-associated disruption of intestinal homeostasis is a major factor contributing to chronic immune activation and inflammation. Dendritic cells (DCs) are crucial in maintaining intestinal homeostasis, but the impact of HIV-1 infection on intestinal DC number and function has not been extensively studied. We compared the frequency and(More)
Cardiovascular disease is the commonest cause of death in Western society. For this reason much effort has been dedicated to the study of its origins, prevention and treatment. Our group has a specific interest in the analysis of the Electrocardiogram (ECG) in life threatening cardiac arrhythmias and its antecedents, with a view to providing diagnostic(More)
Ventricular Tachyarrithmias are one of the most dangerous cardiac pathologies often causing sudden death. Studies for the prediction of these events are based on feature extraction prior to their initiation. Ventricular Late Potentials are considered a marker of abnormality in ventricular function which can cause Ventricular Tachycardia and Ventricular(More)
Reassignment, a technique which sharpens the time frequency information within the time-frequency plane, can be applied to the wavelet transform to produce a more succinct, highly focused, representation. In this paper this technique is applied to interrogate and represent heart rate variation recorded by means of temporary reprogramming of a volunteer's(More)
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