Work

Continuous quantification of spectral coherence using quadratic time-frequency distributions: Error analysis and application

Year: 2009

Type: conference-paper

Abstract: Quadratic time-frequency (TF) distributions have an excellent joint TF resolution, but their applicability is limited by the presence of interferences.In this communication, a methodology for robustly estimating TF coherence (TFC), based on signal-dependent smoothing of the Wigner Ville distribution, is shown to provide a reliable continuous quantification of cardiovascular interactions during non stationary conditions.Bias, standard deviation and tracking capability of the TFC estimator have been quantified in different physiological contexts.Linear coupling between HRV and SPV during tilting has been assessed.It is observed that orthostatic stress provokes a significant increase (p ≤0.02) of TFC in both LF and HF range.

Source: Virtual Community of Pathological Anatomy (University of Castilla La Mancha)

Authors: Michele Orini, Raquel Bailón, LT Mainardi, Ana Mincholé, Pablo Laguna

Institutions: Universidad de Zaragoza, Instituto de Investigación en Ingeniería de Aragón, Politecnico di Milano

Language: English

Topic: Heart Rate Variability and Autonomic Control

Subfield: Cardiology and Cardiovascular Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funder: Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina

OpenAlex ID: W2120736923