Correntropy-Based Spectral Characterization of Respiratory Patterns in Patients With Chronic Heart Failure

• Published in: IEEE transactions on biomedical engineering Vol. 57; no. 8; pp. 1964 - 1972
• Main Authors: Garde, Ainara, Sörnmo, Leif, Jané, Raimon, Giraldo, Beatriz F.
• Format: Journal Article Publication
• Language: English
• Published: United States IEEE 01.08.2010; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Accuracy; Adult; Algorithms; Autoregressive (AR) modeling; Autoregressive processes (cardiology); Cardiology; Cardiovascular disease; Chronic Disease; chronic heart failure (CHF); Classification; Computer Simulation; Cor; correntropy; correntropy spectral density (CSD); Demodulation; Density; Density measurement; Diagnòstic; Electrònica biomèdica; Engineering and Technology; Enginyeria biomèdica; Failure; Female; Frequency bands; Frequency modulation; Government; Heart; Heart failure; Heart Failure - physiopathology; Humans; Information technology; linear classification; Malalties; Male; Medical Engineering; Medical signal processing; Medical treatment; Medicinteknik; Modulation; Nonlinear Dynamics; Patients; Pattern Recognition, Automated - methods; periodic breathing (PB); Peumodynamics; Reproducibility of Results; Respiratory Function Tests - methods; Respiratory Mechanics - physiology; Signal Processing, Computer-Assisted; Sleep; Spectra; spectral density (CSD); Teknik; Ventilation; Àrees temàtiques de la UPC
• ISSN: 0018-9294; 1558-2531; 1558-2531
• DOI: 10.1109/TBME.2010.2044176

A correntropy-based technique is proposed for the characterization and classification of respiratory flow signals in chronic heart failure (CHF) patients with periodic or nonperiodic breathing (PB or nPB, respectively) and healthy subjects. The correntropy is a recently introduced, generalized correlation measure whose properties lend themselves to the definition of a correntropy-based spectral density (CSD). Using this technique, both respiratory and modulation frequencies can be reliably detected at their original positions in the spectrum without prior demodulation of the flow signal. Single-parameter classification of respiratory patterns is investigated for three different parameters extracted from the respiratory and modulation frequency bands of the CSD, and one parameter defined by the correntropy mean. The results show that the ratio between the powers in the modulation and respiratory frequency bands provides the best result when classifying CHF patients with either PB or nPB, yielding an accuracy of 88.9%. The correntropy mean offers excellent performance when classifying CHF patients versus healthy subjects, yielding an accuracy of 95.2% and discriminating nPB patients from healthy subjects with an accuracy of 94.4%.